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Journal : Jurnal Lahan Suboptimal

Bamboo Floated-cultivation Model for Upland Kangkong (Ipomoea reptans Poir.) in Tidal Lowland Area Bernas, Siti Masreah; Pohan, Alamsyah; Fitri, Siti Nurul Aidil; Kurniawan, Edi
Jurnal Lahan Suboptimal Vol 1, No 2 (2012)
Publisher : Jurnal Lahan Suboptimal

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Abstract

Bernas et al. 2012. Bamboo Floated-cultivation Model for Upland Kangkung (Ipomoea reptans Poir.)  in Tidal Lowland Area. JLSO 1(2):177-185. South Sumatra Province has a high potential of swampland for expansion of floating agriculture system. Swampland in Palembang, for instance, can be adapted for floating vegetable cultivation.  The experiments on floating agricultural system have been done by using wasted plastic glass, bamboo for rice and glutinous rice with the application of Hycinth and water Fern compost.  The purpose of this research was to build bamboo rafts which were suitable for growing kangkong (Ipomoea reptans).  Previous rafts which contained water saturated soil for rice growing needed to be adjusted for kankong cultivation which prefer unsaturated soil.  Two bamboo rafts were built using four plastic containers in bottom corners.The first raft was filled with soil plus compost (ratio 1:1) and the other was filled only with swamp soil.  Kankong seeds were planted with the distance of 25 cm by 25 cm.  Data were collected weekly and analysed statistically using t-test.  Results showed that when the rafts were supported by two bamboos, plants were died due to excessive water.  Plants grew well after the rafts were supported by plastic containers.   Composting significantly increased plant height, number of leaves, plants fresh and dried weight.  Plant height treated with compost was 38 cm compared to that without compost treatment which was 28 cm. Fresh plant weight was 149 g/bunch with compost treatment and 25 g/bunch without.  Thus, low fertility of swamp soil only required compost to increase nutrients content for plant growth.This research concluded that plant can be cultivated cheaply and environmentally safe in swampland.  Further experiments such as replacing plastic container in raft construction and growing other vegetables on the raft were proposed.
Kandungan Hara N, P, K pada Gawangan dan Jalan Panen Perkebunan Kelapa Sawit Nuryenti, Ismi; Sulistyani, Dwi Probowati; Bernas, Siti Masreah
Jurnal Lahan Suboptimal Vol 5, No 2 (2016): JLSO
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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Nuryenti, et al. Content of Hara N, P, K on Gawangan and Harvest Road Oil Palm Plantation. JLSO 5(2):219-224. Differences in the location of oil palm plantations cause differences in nutrient content contained in the soil. This study aims to analyze the nutrient content of N, P, K of soil on gawangan and harvest road in PT. Sawit Mas Sejahtera. The method used is a detailed survey method with an observed area of 3 ha. Soil analysis results in nutrient content of N, P, K on harvest road showed higher yield compared to gawangan. N-total value on gawangan 0.11% and 0.16%  harvest road, P-bray value on gawangan 6.15 ppm and 15 ppm harvest road, K-dd value on gawangan 0.10 me/100 g and 0.41 me/100 g harvest road. Soil pH on harvest road and gawangan is a very low pH soil ranging from 3.84 to 4.22. Palm oil production may increase by adding calcification first before the application of N, P, K fertilizer especially on harvest road to improve soil fertility and produce optimal production.
Populasi Bakteri Tanah pada Padi Pasang Surut dengan Aplikasi Pupuk Cair Neptunia Prostrata Aksani, Dila; Aidil Fitri, Siti Nurul; Bernas, Siti Masreah
Jurnal Lahan Suboptimal Vol 5, No 2 (2016): JLSO
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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Abstract

Aksani, et al. Soil Bacteria Population in Paddy Tidal Land by Application of Liquid Fertilizer Neptunia prostrata. JLSO 5(2):170-177. High soil acidity in tidal lowland influences soil bacteria population. This research aimed to determine soil bacteria population with liquid fertilizer application made by Neptunia prostrata for paddy grown in tidal lowland. This research using factorial completely randomized design with two factors and three replications. The first factor was liquid fertilizer rate, consisting of three levels: 96 mL pot-1(P1), 120 mL pot-1(P2) and 144mL pot-1(P3). The second factor was application period consisting of three times: once time at the planting time (W1), two times at the planting time and harvesting time and three times at the planting time, primordial stage and harvesting time. The result showed that the highest soil bacteria population was 10,94 log spk g-1with the treatment of  144 mL pot-1 liquid fertilizer and given once time at the planting time (P1).