摘要
农作物秸秆是一种含碳、氮丰富的可再生生物质资源。我国大部分地区农作物秸秆仅作为燃材或就地焚烧,不仅严重污染环境,而且引起土壤微生物数量减少,减缓肥料转化速度,降低肥效。已有研究表明,秸秆还田后,可有效增加土壤有机质、活性有机碳、碱解氮含量,还对促进磷素循环有积极作用。因此,秸秆还田成为当今世界上普遍重视的一项农业耕作措施。笔者就近年来秸秆还田对土壤碳、氮、磷含量影响的研究进行总结,并分析目前秸秆还田技术存在的问题,提出进一步研究方向及发展前景,以期为该项技术的应用提供参考。
Crop straws are one of renewable material resources rich in carbon and nitrogen. In most areas of China, crop straws are used as firewood or burned, not only cause serious environmental pollution, but also reduces soil microorganism number, slow down speed conversing to fertilizers, and reduce fertilizing efficiency. Research shows that straw returning to the fields can effectively increase soil organic matter, active organic carbon, and alkali-hydrolyzable nitrogen contents, and also can promote phosphorus circulation. Therefore, straw returning into fields has drawn worldwide attention. The influence of straw returning into fields on soil carbon, nitrogen, phosphorus contents over the past years were concluded in this paper,along with problems and research direction, in view of providing reference on this technology.
出处
《宁夏农林科技》
2016年第2期12-15,共4页
Journal of Ningxia Agriculture and Forestry Science and Technology
基金
宁夏国际合作项目-宁夏引黄灌区免耕作关键技术的引进与研发
关键词
秸秆还田
土壤有机质
活性有机碳
碱解氮
磷素循环
Straw returning to field
Soil organic matter
Active organic carbon
Alkali-hydrolyzable nitrogen
Phosphorus cycling
