摘要
研究了田间条件下旱作水稻半腐解秸秆覆盖、蚕豆秆覆盖、地膜覆盖、纸膜覆盖、生稻草覆盖 5种覆盖方式的吸氮特征 ;水稻水作与旱作的产量及其构成因素 ;水稻水作与旱作条件下灌溉水的利用效率。结果表明 ,旱作条件下水稻各部位的含氮量均大于水作 ;旱作水稻的氮素吸收、累积主要在拔节期以后 ,而水作水稻从移栽后就大量吸收氮素 ,灌浆期后很少吸收氮素 ;旱作水稻的产量以半腐解覆盖处理的最高 ,为 8415kg/hm2 ;旱作水稻耗水量只占水作耗水量的 7 14% ,旱作水稻的水分利用效率是水作的
Field experiments were carried out on upland rice mulched with semi decomposed rice straws,horsebean stems,plastic film,paper film or raw rice straws to study their respective effect on N absorption of the crop.In the experiment comparison was also made between paddy rice and upland rice in yield,yield components and utilization efficiency of irrigation water.It was found that the upland rice was higher than the paddy rice in N content in almost every organ.In the upland rice N absorption and accumulation occurred mainly after the jointing stage,whereas in paddy rice the absorption of large amount of N started right after transplantation and then little N was absorbed after the filling stage.The highest yield of upland rice was found in the treatment with semi decomposed rice straws as mulching,reaching 8 415 kg/hm 2,but its water consumption was only 7 14% of that of the paddy rice,about 12 times as high in water use efficiency.
出处
《农村生态环境》
CSSCI
CSCD
北大核心
2001年第2期22-25,44,共5页
Rural Eco-Environment
基金
国家自然科学基金 !(3 9970 449)
