文章基本信息

标题：Yield and Nitrogen Use Efficiency of Locally Improved Rice Varieties in Rice Based Tidal Flooded Ecosystem of Bangladesh
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作者：MAA Mamun ; MM Haque ; QA Khaliq 等
期刊名称：Bangladesh Agronomy Journal
印刷版ISSN：2412-5830
出版年度：2017
卷号：19
期号：2
页码：39-49
语种：English
出版社：Bangladesh Society of Agronomy
摘要：An on farm field experiment was conducted to evaluate locally improved aman rice varieties in terms of nitrogen use efficiency and grain yield in southern region of Bangladesh. The treatments were: i. deep placement of urea (UDP) before panicle initiation stage and ii. farmers’ practice (FP/control). The locally popular rice varieties were used as planting materials. Higher panicles m -2 and grains panicle -1 was obtained from UDP application compared to FP. Nitrogen fertilization increases grain and straw nitrogen content significantly. Application of urea before panicle initiation stage gave considerable higher grain yield in all cultivated varieties. Cultivated aman varieties produced 2.0 to 2.5 t ha -1 grain without application of N fertilizer. But, cultivated local variety Razashail, Kutiagoni, Sadachikon, Sadapajam, Lalmota and Sadamota gave 3.0 to 3.5 t ha -1 grain in tidal prone areas with UDP. Hence, application of urea gave yield advantage by 0.5 to 1.0 t ha -1 . The highest internal, agronomic, recovery and physiological efficiency; nitrogen harvest and grain yield efficiency index was obtained from Kutiagoni, Lalpayka, Sadachikon, Sadapajam, Moulata and Lalmota. Based on the yield and nitrogen fertilizer use efficiency, it could be concluded that UDP before panicle initiation stage is an effective option of urea application for rice cultivation in tidal prone areas. Bangladesh Agron. J. 2016 19(2): 39-49
关键词：Grain yield;nitrogen uptake;nitrogen harvest index;rice cultivars;tidal ecosystem