山西农业大学学报（自然科学版）2017，Vol.37Issue(8)：540-546,7.
一年一作旱地麦田休闲期地膜覆盖保水对植株氮素利用的影响
Effects of film mulching in fallow period on water conservation and nitrogen utilization of dryland wheat in the winter-summer fallow cropping system
摘要
Abstract
[Objective]To study the effects of plastic film mulching during fallow period with great soil water storage before sowing on nitrogen (N) utilization and N use efficiency of dryland wheat conventionally cultivated as a single crop every year, and to seek the best film mulching to achieve water and nitrogen use efficiency.[Methods]The field experiment was conducted at Qiujialing village, Wenxi County, Shanxi Province from 2011 to 2012, under the conditions of full mulching (FM), ridge half mulching (RM), no ridge half mulching (NRM), no mulching (NM), to study the effects of different mulching modes on soil water and nitrogen utilization.[Results]After plastic film mulching during fallow period, the soil water storage from sowing to booting stage in 0~1 m soil layer significantly improved. Compared with NRM and NM treatments, FM and RM could improve soil water storage at sowing stage significantly, reaching 14 mm, 42 mm and 12 mm, 40 mm, respectively, and water use efficiency also increased, and FM was better. After plastic film mulching during fallow period, N accumulation amount in plant at different growth stages increased, especially middle and late stages, it was also conducive to N translocation amount before anthesis (NTBA) to N in grains to promote the grain N accumulation, and which increased N uptake efficiency, N harvest index and N productive efficiency reaching 9%~32%, 2%~10% and 11%~30%, respectively, and FM was better.[Conclusion]Plastic film mulching during fallow period was conducive to store precipitation into the soilresult ing in the increase of soil water storage before sowing. Full mulching had better effects on promoting water use efficiency, N uptake efficiency and N productive efficiency.关键词
旱地小麦/地膜覆盖/0~1m土壤水分/氮素利用Key words
Dryland wheat/Plastic film mulching/Soil water storage at the depth of 0~1 m/Nitrogen utilization分类
农业科技引用本文复制引用
雷妙妙,孙敏,高志强,任爱霞,薛玲珠..一年一作旱地麦田休闲期地膜覆盖保水对植株氮素利用的影响[J].山西农业大学学报（自然科学版）,2017,37(8):540-546,7.基金项目
国家现代农业产业技术体系建设专项经费(CARS-03-01-24)、国家公益性行业(农业)科研专项(201303104)、山西省科技创新团队项目(201605D131041)、山西省回国留学人员重点科研资助项目(2015-重点4) （CARS-03-01-24）
