Jurnal Lahan Suboptimal : Journal of Suboptimal Lands
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Pengaruh Perendaman dan Pemupukan N terhadap Pertumbuhan dan Produksi Padi Toleran Rendaman
No full textIkhwani, 2012. The Effect of Submergence and N fertilizer Application on Plant Growth and Production of  Submerged Tolerant Rice Variety. JLSO 1(1):12-21.This study aimed at analyzing the effect of submergence and N fertilizer application on the plant growth and production of submergence tolerant rice variety. Problems and constrains of  rice production on flood prone and flash flood lowlandbecoming more frequents and more intens, causing submergence of the whole parts of rice crops for certain periods. The experiment was conducted to determine the effect of submergence and N fertilizer application on the growth of two treatment factors using block randomized design with submergence tolerant variety Inpara 4 and 5.  An experiment was conducted in the greenhouse at Muara Experimental Station, Bogor in 2009. The treatments consistedof three replications. The first factor was submergence rice variety Inpara 4 and 5 and the second factor was N management application, whereas (1) 200 kg Urea/ha, (2) 300 kg Urea/ha; (3) 300 kg Ponska/ha + 100 kg Urea/ha; (4) 400 kg Ponska/ha (2x); (5) Briquette Urea (300 kg Urea/ha) dan (6) 300 kg Urea/ha  + Silikat (400 kg SiPPadi HS/ha). Result of the experiment showed that  submergence for 14 to 24 DAP (10 days) on submergence tolerant rice variety combined with Briquette Urea (300 kg urea/ha wrapped in strawpaper) has increased the percentage of tiller number up to 98,9 percent , increased the highest total grain weight  for submergence tolerant rice up to 41,2 gr per pot and increased in the proportion of  wet leave weight growth rate for  submersion treatment up to 1,4g per pot than that  without submergence.Â
Pengaruh Aplikasi Pupuk Kandang dan Sistim Tanam terhadap Hasil Varietas Unggul Padi Gogo pada Lahan Kering Masam di Lampung
No full textBarus, Y. 2012. The Effect of Manure Application and Planting System on the Production of Upland Rice Varieties on Dried Acid Land in Lampung. J. Lahan Suboptimal 1(1):102-106.
Upland rice planted in the dry land is very potential to contribute to the national rice production since upland area is quite large and its cultivation does not require irrigation.. The research was aimed to observe the effect of planting system and the application of organic matter on the production of upland rice. The experiment was carried out in the Buyut Udik village, the Gunung Sugih Subdistrict, the Middle Lampung Regency during the first season 2008/2009. Using Split Plot Design which consisted of two factors, namely: A. Planting System (The tegel system (20 x 20 cm), The planting system legowo 2: 1, and The planting system legowo 4: 1); B. Cow manure(without manure, and with manure 4 t/ha). Inorganic fertilizers applied were Ponska 15:15:15 (200 kg/ha) and urea (200 kg/ha). The highest production of 4,52 t/ha was obtained from the treatment legowo 2:1 with manure 4 ton/ha, followed by the tiles system with manure (4,24 t/ha), and the lowest was obtained from the treatment legowo 4:1 without manure (3,55 t/ha)
Dosmestikasi Ikan Gabus, Channa Striata Blkr, Upaya Optimalisasi Perairan Rawa di Provinsi Kalimantan Selatan
No full textBijaksana, U. 2012. Snakehead Domestication, Channa Striata Blkr, Swamp Water Optimization Efforts in South Kalimantan Province. J. Lahan Suboptimal 1(1):92-101.This research aimed at domesticating snakehead in order to fulfill the consumption without relying on catch. This research was conducted in the Wet Laboratory of the Department of Aquaculture Faculty of Fisheries Banjarbaru from September to October 2006. Snakeheads caught in "beje 'were selected according to weight and size and then kept in concrete tanks. A total of 32 pairs were placed in the experimental tanks.Feed was served as much as 4% of bodyweight/day for 4 times/day. Observations were made at the beginning and end of the experiment which included concentration of E2, egg diameter, IGS, IHS and fecundity. The results obtained were as the followings: water enhancement was associated with the development of the IGS with r2 = 0.92 which was greater than that of the decrease in water with r2=0.55.Greater reduction in water was associated with IHS with r2=0.96 which was greater then that of raising the water with  r2 only 0.74. Increase of water associated with the concentration of estradiol-17 beta with r2=0.82 was greater than that of the decrease of water which was was only 0.55.The decline and rise of water were aasociated with the diameter of each egg with the r2=0.93 and 0.96. Enhancement of water associated with agreater effect on fecundity with the r2=0.74 while decreasing water with the r2=0.36. Several indicators of snakehead reproduction obtained from the experiment were found to be similar with those naturally occured. It was concluded that the snakehead’s gonad could be grown to reach maturity level in the container as a domestication process