生态学杂志2013，Vol.32Issue(6)：1497-1503,7.
休闲期深翻覆盖对旱地小麦水氮利用效率和产量的影响
Effects of deep plowing and mulching in summer fallow period on dryland wheat yield and water-and nitrogen use efficiency
摘要
Abstract
A field experiment was conducted to study the effects of deep plowing at different time and of mulching with different materials in summer fallow period on the nitrogen absorption,translocation,and allocation,and on the water-and nitrogen use efficiency of dryland wheat.As compared with the deep plowing and mulching after 15 days of previous wheat harvest,the deep plowing and mulching after 45 days of previous wheat harvest improved the plant nitrogen content at elongation,booting,and mature stages,increased the plant nitrogen accumulation and nitrogen uptake at each growth stage,increased the nitrogen transfer amount and transfer rate in preanthesis,increased the contribution rate of nitrogen transfer to grain nitrogen in pre-anthesis under liquid film mulching and no-mulching,and increased the accumulation amount and rate of grain nitrogen while decreased the accumulation rate of nitrogen in leaf,steam,and glume + spike stem,with the better effects under seepage plastic mulching.Deep plowing and mulching after 45 days of previous wheat harvest,as compared with that after 15 days of previous wheat harvest,increased the yield and water use efficiency and the nitrogen uptake efficiency and production efficiency.In sum,deep plowing and mulching after rain in fallow period increased the plant nitrogen uptake and accumulation,and was conducive to the transfer of pre-anthesis stored nitrogen to grain,increased the accumulation of grain nitrogen,decreased the nitrogen accumulation of vegetative organ,and ultimately,improved the yield,water use efficiency,nitrogen uptake efficiency,and nitrogen production efficiency.Among the mulching measures,seepage plastic mulching had better effects.关键词
旱地小麦/休闲期/深翻覆盖/产量/水氮利用效率Key words
dryland wheat/ fallow period/ deep plowing and mulching/ yield/ water-and nitrogen use efficiency分类
农业科技引用本文复制引用
白冬,高志强,孙敏,赵维峰,邓妍,李青..休闲期深翻覆盖对旱地小麦水氮利用效率和产量的影响[J].生态学杂志,2013,32(6):1497-1503,7.基金项目
公益性行业科研专项经费(201303104)、现代农业产业技术体系建设专项经费(CARS-03-01-24)、国家自然科学基金项目(31101112)、山西省回国留学人员科研项目(2009037)和山西省青年基金项目(2010021028-3)资助. （201303104）
