作物学报2012，Vol.38Issue(6)：1107-1114,8.DOI:10.3724/SP.J.1006.2012.01107
施氮量对垄作小麦氮肥利用率和土壤硝态氮含量的影响
Effect of Nitrogen Application Level on Nitrogen Use Efficiency in Wheat and Soil Nitrate-N Content under Bed Planting Condition
摘要
Abstract
The variation of nitrate-N content in soil was investigated in winter wheat under bed planting, and the N use efficiency and yield were compared between cultivation patterns of bed planting and flat planting. The amount of N accumulation in wheat plant, N harvest index, and grain yield of wheat were increased with the increase of N application rate, but the N use efficiency and the soil N contribution tended to decrease. At low N application rate (0-66 kg ha-1), the possibility of nitrate-N leaching was declined with no massive accumulation at 0-100 cm soil layer. At high N application rate (165-264 kg ha-1), the content of nitrate-N in 60-100 cm soil layer increased and began to move down in the soil. Cultivation patterns had an effect on N use efficiency, which of bed planting showed higher N use efficiency and wheat yield than flat planting. In flat planting pattern, nitrate-N was mostly accumulated in soil of 60-80 cm depth, which was shallower than that in flat planting (80-100 cm). Cultivation patterns had larger effect on N use efficiency than N application rate; whereas, N application had larger effect on N harvest index, grain yield, and harvest index than cultivation patterns. Under the experimental condition, high N use efficiency and N harvest index were observed in N application treatment of 165 kg ha-1, and the N use efficiency of wheat was significantly higher in bed planting (45.32-47.25%) than in flat planting (35.75-36.41%). The highest grain yields were 8 078.31 kg ha-1 in flat planting and 8 212.27 kg ha"1 in bed planting, which were both obtained in N application treatment of 264 kg ha-1.关键词
种植方式/冬小麦/施氮量/氮肥利用率/土壤硝态氮Key words
Cultivation pattern/ Winter wheat/ Nitrogen application level/ Nitrogen use efficiency/ Nitrate-N in soil引用本文复制引用
冯波,孔令安,张宾,司纪升,李升东,王法宏..施氮量对垄作小麦氮肥利用率和土壤硝态氮含量的影响[J].作物学报,2012,38(6):1107-1114,8.基金项目
本研究由国家公益性行业(农业)科研专项(201203079),国家现代小麦产业技术体系建设项目(nycytx-03)和"十二五"农村领域国家科技计划项目(2011BAD16B15)资助. （农业）
