Peer Review An. Darlina Tanjung
Analysis Of Reliability Land in Various Systems in Village Tembung Areas Deli Serdang
Darlina Tanjung
University Of Isamic Sumatera Utara
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Enhance Utilization of Bentonite, Lime and Waste Buildings to Increase the Land Capacity Tropical
Darlina Tanjung
University Of Isamic Sumatera Utara.
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AGRILAND VOLUME 4 No. 2 JAN-JUNI 2015 ISSN : 2089-5844
RESPON PERTUMBUHAN DAN PRODUKSI TANAMAN MELON (Cucumis Melo L) TERHADAP PEMBERIAN PUPUK KANDANG KAMBING DAN PUPUK NPK (16-16-16)
Mindalisma1, Meizal2 dan Bardansyah3
1,2Staf Pengajar Program Studi Agroteknologi Fakultas Pertanian UISU
3Alumni Fakultas Pertanian UISU
ABSTRAK
Penelitian ini dilaksnakan pada bulan Pebruari sampai bulan April 2014 di jalan AH.Nasution No.6 Kecamatan Medan Johor dengan ketinggian tempat ± 25 meter di atas permukaan laut dengan topografi datar. Penelitian ini bertujuan untuk mengetahui respon petumbuhan dan produksi tanaman melon dengan menggunakan perlakuan pupuk kandang kambing dan pupuk NPK (16-16-16) pada taraf yang berbeda-beda. Rancangan yang digunakan pada penelitian ini adalah Rancangan Acak Kelompok Faktorial (RAK-F) dengan 2 faktor yang diteliti yaitu faktor pupuk NPK (N) yang terbagi 4 taraf yaitu = Tanpa Pemberian (kontrol), N1 = 5 gram/tanaman, N2 = 10 gram/ tanaman, N3 = 15 gram/tanaman dan Faktor Pupuk Kandang Kambing (K) terdiri dari K0 = Tanpa Pemberian, K1 = 400 gram/tanaman, K2 = 600 gram/ tanaman dan K3 = 800 gr/tanaman sedangkan parameter yang diamati adalah panjang sulur tanaman (cm), jumlah tunas (tunas), jumlah daun (helai), jumlah buah (buah) dan berat buah (gram). Hasil penelitian menunjukkan bahwa konsentrasi pemberian pupuk NPK (16-16-16) berpengaruh nyata terhadap parameter panjang sulur, jumlah tunas dan jumlah daun, namun tidak berbda nyata terhadap parameter jumlah buah dan berat buah. Sedangkan untuk pemberian Pupuk Kandang Kambing berpengaruh nyata terhadap parameter jumlah daun namun berpengaruh tidak nyata terhadap parameter panjang sulur, jumlah tunas, jumlah buah dan berat buah. Intraksi pupuk kandang kambing dan pupuk NPK berpengaruh tidak nyata terhadap semua parameter.
Kata Kunci : Pupuk, Produksi, Melon
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AGRILAND VOLUME 5 No. 2 JAN-JUNI 2016 ISSN : 2089-5844
PENGARUH PEMBERIAN PUPUK ORGANIK CAIR DAN PUPUK FOSFAT (P) TERHADAP PERTUMBUHAN DAN PRODUKSI TANAMAN TERUNG UNGU (Solanum melongena L)
Mindalisma dan Rahma Dwi Handayani Rambe
Staf Pengajar Program Study Agroekoteknologi Fakultas Pertanian UISU, Medan
ABSTRAK
Penelitian ini telah dilaksanakan pada bulan Maret 2014 di desa Bandar Kalipa Pasar VII Tembung, Kecamatan Percut Sei Tuan, Kabupaten Deli Serdang, dengan ketinggian tempat ±20 meter diatas permukaan laut. Penelitian ini bertujuan untuk mengetahui pengaruh pemberian pupuk organik cair dan pupuk fosfat (P) terhadap pertumbuhan dan produksi tanaman terung ungu (Solanum melongena L). Rancangan yang digunakan adalah Rancangan Acak Kelompok (RAK) Faktorial, terdiri dari dua faktor yang diteliti yaitu Faktor pemberian Pupuk Organik Cair (ABG daun) (A) terdiri dari 4 taraf perlakuan yaitu : A0 = 0 cc/L air/plot (Kontrol), A1 = 2 cc/L air/plot, A2 = 4 cc/L air/plot, A3 = 6 cc/L air/plot dan faktor pemberian Pupuk Fosfat (P) terdiri dari 3 taraf perlakuan yaitu : P1 = 20 g/plot, P2 = 30 g/plot, P3 = 40 g/plot. Parameter yang diamati adalah Tinggi tanaman (cm), Jumlah daun (buah), Umur berbunga (hari), Jumlah bunga (Buah), Panjang buah (cm), Jumlah buah (buah), Berat buah / sampel/panen (g), dan Berat buah /plot/panen (g). Hasil penelitian menunjukan bahwa pemberian pupuk organik berpengaruh tidak nyata terhadap seluruh parameter yang diamati. Pemberian Pupuk Fosfat berpengaruh tidak nyata terhadap semua parameter yang diamati. Interaksi pupuk organik cair dan pupuk fosfat berpengaruh tidak nyata terhadap semua parameter yang diamati.
Kata Kunci : Pupuk Organik Cair, Pupuk Pospat, Pertumbuhan dan Produksi Terung
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Jurnal Penelitian Bidang Ilmu Pertanian
Volume 13 Nomor 2, Agustus 2015
Respon Pertumbuhan dan Produksi Kacang Panjang (Vigna sinensis L.) Terhadap Pemberian EM4 dan Pupuk Kandang Sapi
Mindalisma dan Amri Simangungsong
Fakultas Pertanian Universitas Islam Sumatera Utara
Abstrak
Penelitian ini dilaksanakan pada bulan Maret 2014 di jalan AH. Nasution No. 6 Kecamatan Medan Johor, dengan ketinggian tempat 25 meter diatas permukaan laut dengan topografi datar. Penelitian ini bertujuan untuk mengetahui respon pertumbuhan dan produksi tanaman kacang panjang dengan perlakuan pupuk kandang sapi dan pupuk hayati EM4 pada taraf yang berbeda-beda. Rancangan yang digunakan adalah Rancangan Acak Kelompok Fuktorial (RAK-F) dengan dua faktor yang diteliti,yaitu : faktor pupuk hayati Em4 (E) terbagi 4 taraf yaitu E0 = tanpa pemberian (kontrol), E1 = 5ml, E2 = 10ml, E3 = 15ml dan faktor pupuk kandang sapi (S)terdiri dari 4 taraf yaitu : S0 = tanpa pemberian (kontrol), s1 = 10ton/ha, S2 = 20ton/ha, S3= 30 ton/ha sedangkan parameter yangdiamati adalah panjang.
Kata Kunci : Pupuk EM4. dan polong
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Jurnal Pertanian Bidang Ilmu Pertanian
Volume 16 Nomor 1, April 2018
Respon Pertumbuhan dan Produksi Tanaman Kedelai (Glycine maxx L.) Terhadap Pemberian Pupuk Organik Granul dan NPK Phonska
Mindalisma dan Chairani Siregar
Fakultas Pertanian Universitas Islam Sumatera Utara
Abstrak
Penelitian ini dilaksanakan di Namorambe Komplek Kawilhan, Jl. Namorambe, Kecamatan Namorambe, Kabupaten Deliserdang. Dengan ketinggian tempat 25 mdpl dengan topografi datar. Tujuan penelitian ini untuk mengetahui respon pertumbuhan dan produksi tanaman kedelai terhadap pemberian pupuk organik granul dan npk phonska. Rancangan yang digunakan adalah rancangan acak kelompok (RAK), yang terdiri dari dua faktor yaitu faktor pertama adalah pupuk organik granul yang terdiri atas 4 taraf yaitu G0( kontrol/tanpa perlakuan) , G1 (150 g/plat), G2 (300 g/plat), G3 (450 g/plat). Sedangkan faktor kedua adalah pupuk npk phonska yang terdiri dari 3 taraf perlakuain yaitu N1 (50 g/plat), N2 (100 g/plat), N3 (150 g/plat). Parameter yang diamati adalah tinggi tanaman (cm), jumlah cabang, jumlah polong.
Kata Kunci : kedelai, pupuk organik granul, pupuk npk phonska
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Al Ulum Seri Saintek, Volume IV Nomor 1, Tahun 2016
Respon Pertumbuhan Vegetatif Bibit Kelapa Sawit (Elaesis guineensis JACQ) Terhadap Pemberian ZPT NAA dan Pupuk Kandang Ayam di Main Nursery
Ir. Mindalisma, MM., Ir. Murni Sari Rahayu, MP.
Fakultas Pertanian UISU
Abstrak
Penelitian ini telah dilakukan di Desa Sambirejo Pasar VII Tebung, Kecamatan Percut Sei Tuan, Kabupaten Deli Serdang dengan ketinggian tempat 25 m diatas permukaan laut topografi datar. Penelitian ini bertujuan untuk mengetahui respon pertumbuhan bibit kelapa sawit dengan perlakuan ZPT NAA dan Pupuk kandang ayam pada taraf yang berbeda-beda. Rancangan yang digunakan adalah Rancangan Acak Kelompok (RAK) Faktorial, dengan dua Faktor yang diteliti yaitu Faktor Pemberian ZPT NAA (N) dengan empat taraf N0 = 0 Mg/L Air; N1 = 1,5 Mg/L Air; M2 = 3,0 Mg/L Air; N3 = 4,5 Mg/L Air dan faktor Pupuk Kandang Ayam dengan tiga taraf : A0 = 0 g/Polibek; A1 = 100 g/polibek; A2 = 200g/polibek. Parameter yang diamati adalah : tinggi bibit (cm); diameter batang (mm); jumlah daun (helai); total luasdaun (cm2); berat basah bibit (g) dan berat kering bibit (g). Hasil penelitian menunjukkan bahwa pemberian ZPT NAA berpengaruh nyata terhadap berat basah daun; berat kering daun; berat basah akar; berat kering akar; tetapi berpengaruh tidak nyata terhdap tinggi bibit; diameter batang; jumlah daun dan total luas daun. Pemberian pupuk kandang berpengaruh nyata terhadap berat bsah daun; berat basah akar; berat kering akar.
Kata Kunci : ZPT; Pupuk Kandang Ayam; Pertumbuhan Bibit
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World Journal of Pharmaceutical and Life Sciences
WJPLS
wjpls, 2018, Vol. 4, Issue 12, 13-20
STUDY OF STORAGE PERIOD AND PACKAGING TYPES AGAINST PHYSIOLOGICAL ASPECTS OF SOYBEAN (GLYCINE MAX (L.) MERRILL) SEEDS
Saur Ernawati Manik1, Orleans Ginting2, Yenni Asbur1*, Yayuk Purwaningrum1, Rahmi Dwi Handayani Rambe1, Syamsafitri1, Murni Sari Rahayu1, Arif Anwar1, Indra Gunawan1, Dedi Kusbiantoro3, Khairunnisyah3, Miranti4
1Department of Agrotechnology, Faculty of Agriculture, Universitas Islam Sumatera Utara, Jalan Karya Wisata Gedung Johor, Medan 20144, Indonesia.
2Department of Agroecotechnology, Faculty of Agriculture, Universitas Pembangunan Panca Budi, Jalan Jend. Gatot Subroto Km. 4.5 Sei Sikambing, Medan 20122, Indonesia.
3Department of Agribusiness, Faculty of Agriculture, Universitas Islam Sumatera Utara, Jalan Karya Wisata Gedung Johor, Medan 20144, Indonesia.
4Department of Agricultural Product Technology, Faculty of Agriculture, Universitas Islam Sumatera Utara, Jalan Karya Wisata Gedung Johor, Medan 20144, Indonesia.
ABSTRACT
Soybeans are one of the agricultural commodities that are economically strategic sectors in Indonesia. The main limiting factor for soybean production is the availability of quality seeds because soybean seeds rapidly deterioration in storage. This study aimed to determine the effect of packaging type and storage period on the physiological aspects of soybean seed viability. The study was conducted at the Balai Benih Induk Laboratory, Medan, North Sumatra, Indonesia from January to September. The study used factorial Randomized Completely Design with 3 replications. The first factor is the packaging type (P) consisting of 4 levels: container (P1); plastic bags (P2), pots (P3), wooden box (P4). The second factor is the save period (S) consists of 3 levels: 2 months (S1), 4 months (S2), 6 months (S3). Variables observed were seed water content, germination, germination rate index, anaphase index, and chromosome aberration. The results showed that soybean seeds stored in container were able to maintain the quality of their seeds for 6 months in the storage period based on a decrease in water content, germination, and anaphase index. Soybean seeds stored in container can reduce the rate of deterioration of seed viability based on the germination rate index. Although the germination of soybean seeds stored in container for 6 months is still above 90%, they have experienced chromosome aberration.
KEYWORDS: Soybean seed, packaging, storage period, water content, seed viability.
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CHILEAN JOURNAL OF AGRICULTURAL RESEARCH 79(3)
JULY -SEPTEMBER 2019
Latex quality and yield parameters of Hevea brasiliensis (Willd. ex A. Juss.) Müll. Arg. clone PB 260 for different tapping and stimulant application frequencies
Yayuk Purwaningrum1*, Yenni Asbur1, and Junaidi2
1North Sumatera Islamic University, School of Agriculture, Department of Agrotechnology, Jl. Karya Wisata Gedung Johor, Medan 20144, Indonesia. *Corresponding author (yayuk.purwaningrum@fp.uisu.ac.id).
2Sungei Putih Research Center, Indonesian Rubber Research Institute, PO. Box 1415 Medan 20001, Indonesia.
Received: 7 December 2018; Accepted: 29 March 2019; doi:10.4067/S0718-58392019000300337
ABSTRACT
Tapping and stimulant applications are an attempt to increase latex yield. A combination of stimulants with low intensity tapping systems was expected to reduce tapping costs. In addition, it was necessary to regulate the stimulant application frequency based on type and potential clone production. The objective was to determine the effect on physiological parameters and latex yield of Hevea brasiliensis (Willd. ex A. Juss.) Müll. Arg. clone PB 260 for different tapping and stimulant application frequencies. The study design was split block in randomized complete block plots with three replicates and two factors. The main plot was the tapping system consisting of four levels: quarter-spiral downward tapping (S/4 d3), quarter-spiral upward tapping (S/4U d3), half-spiral downward tapping (S/2 d3), and half-spiral upward tapping (S/2U d3). The subplots were four stimulant application frequencies consisting of ethephon 2.5% applied once every 15 d (ET 15d) and gas stimulant (equal to ± 100% ethylene) applied once every 9 d (ETG 9d), once every 18 d (ETG 18d), and once every 27 d (ETG 27d). The highest sucrose levels (3.62 mM) were obtained in S/2 d3 and ET/15d combination. The highest inorganic P content (27.68 mM) was in S/2 d3 and ETG/18d. The highest yield (2418.53 kg ha-1 yr-1) was in S/4d3 and ETG/18d. The tapping system S/4d3 and ETG/18d combination was able to increase production by 102.26% compared with the conventional tapping system (S/2 d3 and ET/15d). After the 1-yr trial, all treatments showed 0.47 to 0.54 mM thiol content, which indicated that plants did not experience over-exploitation stress.
Key words: Ethephon, ethylene gas, inorganic phosphorus, rubber tree, sucrose, thiol.
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Jurnal Penelitian Karet, 2019, 37 (1) : – Indonesian J. Nat. Rubb. Res. 2019, 37 (1)
KARAKTER FISIOLOGI LATEKS DAN HUBUNGANNYA DENGAN PRODUKSI LATEKS KLON GT 1 DI KEBUN KARET RAKYAT KABUPATEN LANGKAT
Physiological Character of Latex and Its Relationship to GT 1 Latex productivity at Rubber Smallholder in Langkat District
Yayuk PURWANINGRUM* dan Yenni ASBUR
Departemen Agroteknologi, Fakultas Pertanian, Universitas Islam Sumatera Utara Jalan Karya Wisata Gedung Johor, Medan 20144, Sumatera Utara *E-mail : yayuk.purwaningrum@fp.uisu.ac.id
Diterima : 13 Juni 2019 / Disetujui : 25 Juni 2019
Abstract
Sucrose levels, inorganic phosphate and thiol are physiological characteristics of rubber plants that are closely related to the ability of plants to produce latex. This study aimed to determine the correlation between physiological characters and latex production of GT1 clone latex, and the timing of proper stimulant application without disturbing the health of rubber plants. The research was carried out in smallholder rubber plantations. The research was carried out in Harapan village, Sei Lapang, Langkat District, North Sumatra Province and Physiology Laboratory of Sungei Putih Research Institute. The clones tested in this study were GT1 clones at the age of 20 years. This study used the method of statistical analysis Correlation and Regression Test. Based on statistical analysis. The results of correlation analysis show that sucrose levels were negatively correlated with latex production, where high sucrose levels of low latex production were the opposite. In June the production of high latex was influenced by physiology of latex as much as 57.25%. This condition was appropriate time for stimulant application on GT 1 clones.
Keywords: Hevea brasiliensis; phosphate inorganic; sucrose; thiol
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Agriland Vol. 7 No. 1 Januari-Juni 2019, hal 1-8
Aplikasi pupuk organik cair kulit pisang dan pupuk kandang ayam pengaruhnya terhadap pertumbuhan dan produksi tanaman mentimun (Cucumis Sativus L.)
The application of liquid organic fertilizer of banana skin and chicken manure affects the growth and production of cucumber (Cucumis Sativus L.)
Mahyuddin1, Yayuk Purwaningrum1*, Rangga Tri Anggi Sinaga2
1Dosen Program Studi Agroteknologi, Fakultas Pertanian, Universitas Islam Sumatera Utara, Jl. Karya Wisata Gedung Johor, Medan 20144, Indonesia
2Program Studi Agroteknologi, Fakultas Pertanian, Universitas Islam Sumatera Utara, Jl. Karya Wisata Gedung Johor, Medan 20144, Indonesia *Corresponding Author: yayuk.purwaningrum@fp.uisu.ac.id
Abstract
The enzyme content of banana xylase contains chemical elements such as magnesium, sodium, phosphorus, sulfur so that banana skin has good potential to be used as organic fertilizer. The purpose of this study was to determine the effect of giving banana skin liquid organic fertilizer and chicken manure, as well as knowing the most optimal dosage against the growth and production of cucumber. This study used a Randomized Block Design (RBD) with two factors, namely the dose of liquid organic fertilizer and manure. The dose of banana organic fertilizer used is (0 mL/plant), P1 (20 mL/plant), P2 (40 mL/plant), and P3 (60 mL/plant). The doses of chicken manure used are A0 (0 kg/plot), A1 (2 kg/plot), A2 (4 kg/plot) and A3 (6 kg/plot). The results showed that banana peel liquid organic fertilizer had an effect on the number of productive branches, giving chicken manure affected the number of productive branches but did not fall on the weight of the fruit per sample and the weight of the fruit per plot. The most optimal dose for banana skin organic liquid fertilizer is P2 (40 mL/plant) and the most optimal dose for chicken manure is A3 (6 kg/plot).
Keywords: Doses, organic fertilizers, animal fertilizers, organic waste
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wjpls, 2019, Vol. 5, Issue 5 93-100
World Journal of Pharmaceutical and Life Sciences
DRY LAND MANAGEMENT SYSTEM THROUGH PLANTING PATTERNS IMPROVEMENT IN BERASTAGI, KARO REGENCY, INDONESIA
Saur Ernawati Manik1, Orleans Ginting2, Yenni Asbur1*, Yayuk Purwaningrum1, Rahmi Dwi Handayani Rambe1, Syamsafitri1, Arif Anwar1, Indra Gunawan1, Murni Sari Rahayu1, Mindalisma1, Mahyuddin1, Dedi Kusbiantoro3, Khairunnisyah3, Dian Hendrawan3, Miranti4, Mahyu Danil4, and M. Nuh4
1Department of Agrotechnology, Faculty of Agriculture, Universitas Islam Sumatera Utara, Jalan Karya Wisata Gedung Johor, Medan 20144, Indonesia.
2Department of Agroecotechnology, Faculty of Agriculture, Universitas Pembangunan Panca Budi, Jalan Jend. Gatot Subroto Km. 4.5 Sei Sikambing, Medan 20122, Indonesia.
3Department of Agribusiness, Faculty of Agriculture, Universitas Islam Sumatera Utara, Jalan Karya Wisata Gedung Johor, Medan 20144, Indonesia.
4Department of Agricultural Product Technology, Faculty of Agriculture, Universitas Islam Sumatera Utara, Jalan Karya Wisata Gedung Johor, Medan 20144, Indonesia.
ABSTRACT
The land in Berastagi has a high erosion potential caused the high intensity of rainfall, steep slopes, and the cropping pattern is not good. Long-lasting erosion has lowered soil fertility and even reduced or eliminated soil tillage. This study aimed to obtain the appropriate intercropping pattern in the Berastagi dry land of Karo Regency, Indonesia. This study conducted a non-factorial randomized block design method with 5 replications. The treatment is in the form of farmers planting patterns and improved cropping patterns, namely P1, P2, P3, P4, and P5. The results showed that improved cropping patterns yielded higher rice equivalent yields compared to farmers’ cropping patterns. Improved cropping patterns of P4, P2, and P3 are economically feasible in the Berastagi Karo dry land because they have a marginal B/C ratio above two, while the farmers’ cropping pattern, namely intercropping of upland rice/cassava has the lowest B/C ratio of 1.72.
KEYWORDS: Intercropping, upland paddy, cassava, corn, peanuts, green beans.
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CHILEAN JOURNAL OF AGRICULTURAL RESEARCH 78(4) OCTOBER -DECEMBER 2018
Growth and nutrient balance of Asystasia gangetica (L.) T. Anderson as cover crop for mature oil palm ( Elaeis guineensis Jacq.) plantations
Yenni Asbur1*, Yayuk Purwaningrum1, and Mira Ariyanti2
1Universitas Islam Sumatera Utara, Faculty of Agriculture, Department of Agrotechnology, Jalan Karya Wisata Gedung Johor, Medan 20144, Indonesia. *Corresponding author (yenni.asbur@fp.uisu.ac.id).
2University of Padjajaran, Faculty of Agriculture, Department of Agronomy, Jalan Raya Bandung-Sumedang km 21, Jatinangor, West Java, Indonesia. Received: 2 June 2018; Accepted: 3 October 2018; doi:10.4067/S0718-58392018000400486
ABSTRACT
Nutrient recycling and mineral balance are important factors affecting nutrient budgets in oil palm (Elaeis guineensis Jacq.) plantations. The nutrient budget includes processes such as plant uptake, removal by harvesting, accumulation or storage in the standing plant, and recycling through decomposition of cover crop Asystasia gangetica (L.) T. Anderson can be utilized as cover crops in mature oil palm plantations with appropriate management. This study aimed to examine the growth of A. gangetica in 17 yr old oil palm plantations with different populations, understanding the contribution of A. gangetica to improve available nutrient in the plantation on the nutrient balance, and to study its role as cover crop in the mature oil palm plantation. The experiment was conducted in an experiment field of 17 yr old of mature oil palm at Bogor, Indonesia. Results showed that A. gangetica can be used as cover crops in mature oil palm plantations because it meets several conditions such as rapidly covering the land (11 wk after planting), and able to increase the available N, P, K as much as 18.49%, 9.20%, 38.36%, respectively, based on the nutrient balance with the optimum population is 1 000 000 plants ha-1.
Key words: Cover crop, Elaeis guineensis, nutrient availability of N, P, K, nutrient balance.
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wjpls, 2018, Vol. 4, Issue 4, 56-62
World Journal of Pharmaceutical and Life Sciences
RESPONSE OF GROWTH AND YIELD OF OKRA (ALBEMOSCHUS ESCULENTUS (L.) MOENCH) AGAINST VARIOUS COLORS OF PLASTIC MULCH AND GOAT MANURE
Arif Anwar1, Rahmi Dwi Handayani Rambe1, Aldywaridha1, Mahyuddin1, Yenni Asbur1*, Yayuk Purwaningrum1 and Mahyu Danil2
1Department of Agrotechnology, Faculty of Agriculture, Universitas Islam Sumatera Utara, Jalan Karya Wisata Gedung Johor, Medan 20144, Indonesia.
2Departmen of Agricultural Product Technology, Faculty of Agriculture, Universitas Islam Sumatera Utara, Jalan Karya Wisata Gedung Johor, Medan 20144, Indonesia.
ABSTRACT
This study aimed to determine the growth response and okra plant results on various colors of plastic mulch and goat manure. The study was conducted in Namorambe, Deli Serdang District from February 2017 until June 2017. The study used Split Plot Design in a randomized complete block design with three replications and two factors. The main plot is a plastic mulch color (W) consisting of three levels, namely: silver (W1), black (W2), and transparent (W3). The subplot is a dosage of goat manure (K) consisting of four levels, namely: 0 t/Ha (K0), 10 t /Ha (K1), 15 t/Ha (K2), and 20 t/Ha (K3). The results showed the use of plastic mulch colors and goat manure dose did not affect the growth of okra, but affects okra yield. The pattern of the relationship between the growth of okra and the okra yields a quadratic line equation. The yield of okra is more influenced by the height of plant compared with the number of leaves based on the value of its determinant coefficient (R2).
KEYWORDS: Growth response, okra plant, coefficient.
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The Roles of Asystasia gangetica (L.) T. Anderson and Ridge Terrace in Reducing Soil Erosion and Nutrient Losses in Oil Palm Plantation in South Lampung, Indonesia
Yenni Asbur*A, Sudirman YahyaB, Kukuh MurtilaksonoC, SudradjatB, Edy Sigit SutartaD
A Department of Agrotechnology, Islamic University of North Sumatra, Gedung Johor, Medan 20144, Indonesia B Department of Agronomy and Horticulture, Bogor Agricultural University, Darmaga Campus, Bogor 16680, Indonesia C Department of Soil Science and Land Resources, Bogor Agricultural University, Darmaga Campus, Bogor 16680, West Java, Indonesia D Indonesian Oil Palm Research Institute, Kampung Baru, Medan 20158, North Sumatra, Indonesia
*Corresponding author; email: yenniasbur@gmail.com
Abstract
Asystasia gangetica (L.) T. Anderson is a weed commonly found on oil palm plantations and can be used as cover crop for mature oil palm plantations due to its tolerance to shading. The use of cover crop is a soil conservation technique to support sustainable availability of soil nutrients by reducing erosion and nutrients loss, particularly during the rainy seasons. This research aims to determine the roles of A. gangetica as cover crop for measures against erosion and nutrients loss in mature oil palm plantation. This research was conducted in oil palm plantation, Unit Rejosari, PT Perkebunan Nusantara (PTPN) VII, District of Natar, South Lampung Regency from August 2014 to April 2015. The research used split block design in randomized complete block design with two factors and six replications. The main plots were ridge terrace, namely with and without ridge terrace. The sub plots were cover crops, namely with and without cover crops A. gangetica. The results show that using A. gangetica as cover crops in mature oil palm plantations effectively minimized erosion and loss of organic C, N, P, and K by 95.7%, 93.4%, 96.0%, and 90.0 %, respectively. The use of cover crop became more effective when combined with ridge terrace and reduced erosion by 94.1%, and loss of organic C, N, P and K by 99.1%, 99.2%, 90.0% and 98.5%, respectively.
Keywords : carbon-organic, cover crops, kalium, natrium, phosphat
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