水土保持通报2016，Vol.36Issue(5)：85-90,6.DOI:10.13961/j.cnki.stbctb.2016.05.022
还田秸秆及其腐解产物的吸水能力研究
Water Absorption Capacity of Straw Returns and Its Decomposing Matters
摘要
Abstract
Objective] The objective of this study is to study the relationships between straw decomposition period and water absorption capacity of rice ,wheat and rape straw in order to provide the theoretical basis for effective utilization of straw resources and field water management .[Methods] The method of nylon net bag under moisture saturation incubation was used .[Results] The decomposition rate of three crop straws was much faster at the early period than the following periods .The cumulative decomposing rates were 67.8% , 55 .5% and 49 .2% for rice ,wheat and rape straw after 110 days ,respectively .The light microscopy and infrared radiation(IR) analysis indicated that the composition ,chemical structure and morphology of rice straws changed greatly compared to control treatment after 110 days incubation .The results of water absorp‐tion capacity showed that the saturated water of dried rice ,wheat and rape straw were 3 .87 ,2 .51 and 3 .61 g/g ,respectively .After 15 days incubation ,the saturation water absorption of rice straw reached to the lar‐gest value of 5 .17 g/g ,then gradually decreased and tended to be stable .While the saturated water absorp‐tion of wheat and rape straw reached to the lowest ,which were 1 .87 and 2 .59 g/g ,respectively ,after a 5 days incubation ,and then increased gradually .The results of water absorption effects showed that the crop straw had the largest water retention capacity in the early decomposition period ,and the water retention capacity decreased with the extension of the decomposing process .In brief ,the water retention capacity of crop straw was influenced by both decomposition period and straw quality .[Conclusion] In the implement of straw returning to filed ,especially for straw incorporation ,we should pay more attention to straw water con‐tent ,returning period and field moisture ,to reduce the negative effect caused by straw water absorption .关键词
还田秸秆/腐解产物/吸水能力Key words
straw returns/decomposing matter/water retention capacity分类
农业科技引用本文复制引用
李继福,胡敏,鲁剑巍..还田秸秆及其腐解产物的吸水能力研究[J].水土保持通报,2016,36(5):85-90,6.基金项目
公益性行业（农业）科研专项“三熟区耕地培肥与合理轮作制”（201503123），“钾肥高效利用与替代技术研究”（201203013）；人才引进启动基金（801180010140）和长江大学大学生科技创新项目 （）
