Effects of urea-N fertilizer dosage supplemented with Ipil-Ipil tree litter on yield of rice and insect prevalence
Effects of urea-N fertilizer dosage supplemented with Ipil-Ipil tree litter on yield of rice and insect prevalence作者机构:Former graduate student Department of Agroforestry Bangladesh Agricultural University Mymensingh Mymenisngh-2202 Bangladesh Department of Agroforestry Faculty of Agriculture Bangladesh Agricultural University Mymenisngh-2202 Bangladesh
出 版 物:《Journal of Forestry Research》 (林业研究(英文版))
年 卷 期:2006年第17卷第4期
页 面:335-338页
核心收录:
学科分类:090101[农学-作物栽培学与耕作学] 09[农学] 0901[农学-作物学]
主 题:Nitrogen fertilizer dosage Insect prevalence Rice Ipil-ipil Leucaena leucocephala
摘 要:The present study was undertaken to determine the effects of different levels of urea-N fertilizer in addition to ipil-ipil tree litter on yield of rice and insect prevalence. The field study was conducted at the Agroforestry Field Laboratory, Bangladesh Agricultural University, Mymensingh during July-December 2004. The treatments included 0, 90, 180, and 270 kg urea per hectare. All four treatments received five tons ipil-ipil tree litter per hectare. The experiment was laid out in a randomized complete block design (RCBD) with four replications. The results showed that the different treatments significantly influenced the yield and yield component viz. total tillers/hill, effective tillers/hill, filled grains and unfilled grains/panicle. The highest yield of 4.62 t·h^m-2 with an increase of 21.57% over the control was recorded in treatment 180 kg urea·h^m-2, which was statistically similar to treatment 90 kg urea·h^m-2. The prevalence of insects viz. green leafhopper, brown plant hopper, rice bugs, leaf folder and stem borers were mostly correlated with N-levels. The prevalence of insects in general gradu- ally increased with the increase of N. Therefore, this study suggests that the combined application of organic materials (tree litter of ipil-ipil) and N-fertilizer of 90 kg·h^m-2 may oroduce good yield while minimizine insect arevalence in the rice field.