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Effects of Soil Amendment Fertilizer on Water and Nutrient Utilization of Winter Wheat
Authors
冯浩
周立峰
Publication date
1 January 2011
Publisher
Abstract
2009-2010年,通过田间试验设置不同灌水与施肥水平,研究了不同施用量新型有机无机复合肥(SAF)对冬小麦水肥利用的影响。结果表明:随着灌水量的增大,新型有机无机复合肥最佳施肥量也随之增大;各灌水施肥处理中,拔节期灌水60 mm、新型有机无机复合肥施肥水平1 350 kg/hm2时,冬小麦产量最大,为8 894.11 kg/hm2。在考虑产投比的前提下,不灌水、灌一水、灌两水下经济最佳SAF施肥量分别为656 kg/hm2、920.13 kg/hm2与872.38 kg/hm2。SAF处理可明显提高小麦生产水分利用效率(WUE)与养分利用效率(PUE),其变化规律与产量变化基本一致。灌水处理下,SAF能显著提高农田土壤有机质含量,并能减缓因灌水增大而引起的小麦农田土壤有机质亏损。SAF较常规施肥能更明显地提高土壤有机质及碱解氮含量。灌水对冬小麦氮肥偏生产力(NPEP)影响不大。在不超量施用SAF的条件下,SAF处理的NPEP高于NF处理,SAF处理间的NPEP随着施肥量的增大逐渐减小
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Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources
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Last time updated on 21/09/2018