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首页> 外文期刊>Journal of Plant Nutrition >NITROGEN UPTAKE AND RECOVERY FROM N FERTILIZER AND LEGUME CROPS IN WETLAND RICE MEASURED BY 15N AND NON-ISOTOPE TECHNIQUES
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NITROGEN UPTAKE AND RECOVERY FROM N FERTILIZER AND LEGUME CROPS IN WETLAND RICE MEASURED BY 15N AND NON-ISOTOPE TECHNIQUES

机译：用15N和非同位素技术测定湿地水稻氮肥和豆科作物的氮素吸收与吸收。

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摘要

Intensive rice-based cropping systems rely on nitrogenous fertilizer for optimum grain production and legume crops could be used as an alternative nitrogen (N) source for rice. We investigated the fate of N applied to dual cropping wetland rice in the form of legume residue and 15N labeled fertilizer. In 2001-2002, hairy vetch and broad bean accumulated 131 and 352 kg N ha-1 of which 41 and 78% was derived from N2 fixation. In 2002-2003, hairy vetch accumulated 64 kg N ha-1 and broad bean accumulated 320 kg N ha-1 of which 21 to 24% was derived from hairy vetch and 31 to 82% N was derived from broad bean by N difference and 15N-natural abundance method. Our results reveal that hairy vetch and broad bean can supply 50-100% of N required for intensive wetland rice and can be a viable alternative N source to enhance soil fertility.
机译：集约型水稻种植系统依靠氮肥来实现最佳谷物生产，而豆类作物可用作水稻的替代氮（N）源。我们调查了以豆类残留物和15N标记肥料的形式施用于双重作物湿地水稻的N的命运。在2001-2002年间，etch子和蚕豆累积了131和352 kg N ha-1，其中41％和78％来自于固氮。在2002-2003年间，紫云英累积了64 kg N ha-1，蚕豆累积了320 kg N ha-1，其中21％至24％是从hair豆中提取的，而31％至82％的氮素是由蚕豆中的N差和15N自然丰度法。我们的结果表明，多汁的v子和蚕豆可以提供集约化湿地水稻所需的50-100％的氮，并且可以作为可行的替代氮源来增强土壤肥力。

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