Abstract Enhancing rice yield is a great challenge for rice growers in the tidal flooded ecosystem, where poor agronomic management is one of the major constrains. Improve management practice (IMP) was compared with traditional farmers’ practice (TFP) in evaluating rice productivity, nutrient uptake, translocation and farm income in tidal flooded ecosystem. Results revealed that, IMP significantly produced higher number of panicles m−2, more grain panicle−1 and better grain filling. The rice cultivars produced 2.0 to 2.5 t grain ha−1 with TFP, while 3.0 to 4.0 t ha−1 with IMP. In different rice cultivars, the grain yield in IMP increased 12 to 60% over TFP. Similarly, the grains in IMP treatment absorbed 21.41 to 57.03 kg N ha−1 whereas only 15.85 to 46.94 kg N ha−1 in TFP plot. However, higher nitrogen (N) transfer from shoot to grain in IMP also suggests that the amount of N in soil was too low to meet the plant demand in TFP. Although, the IMP involved additional cost, but it gave significantly higher gross return (438 to 954 US$ha−1) and margin (397 to 913 US$ha−1) which added farm income upto 225 US$ha−1 over TFP. Hence, it could be concluded that IMP is a potential option for increasing grain yield and farm income during aman season in the tidal flooded ecosystem.

中文翻译：

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潮汐淹没水稻生态系统中氮素的管理策略、吸收和转运

摘要 在潮汐淹没的生态系统中，提高水稻产量是水稻种植者面临的巨大挑战，其中农艺管理不善是主要制约因素之一。改进管理实践 (IMP) 与传统农民实践 (TFP) 在评估潮汐淹没生态系统中水稻生产力、养分吸收、易位和农场收入方面进行了比较。结果表明，IMP显着产生了更多的穗数m-2、更多的穗数-1和更好的籽粒灌浆。水稻品种用 TFP 生产 2.0 到 2.5 t 谷物 ha-1，而用 IMP 生产 3.0 到 4.0 t ha-1。在不同的水稻品种中，IMP 的籽粒产量比 TFP 增加了 12% 到 60%。类似地，在 IMP 处理中的谷物吸收了 21.41 至 57.03 kg N ha-1，而在 TFP 图中仅吸收了 15.85 至 46.94 kg N ha-1。然而，在 IMP 中，较高的氮 (N) 从芽到谷物的转移也表明土壤中的氮含量太低，无法满足植物对 TFP 的需求。虽然，IMP 涉及额外成本，但它提供了显着更高的总回报（438 至 954 美元公顷-1）和利润（397 至 913 美元公顷-1），使农场收入比 TFP 增加了 225 美元公顷-1 . 因此，可以得出结论，在潮汐淹没的生态系统中，IMP 是增加粮食产量和农业收入的潜在选择。