秸秆还田对水溶性有机碳的影响  

Study on effect of stock return to soil on water soluble organic carbon

作　　者：郑立臣[1] 解宏图[1] 何红波[1] 陈盈[1] 白震[1] 张旭东[1] 

机构地区：[1]中国科学院沈阳应用生态研究所

出　　处：《辽宁工程技术大学学报（自然科学版）》2006年第B06期330-332,共3页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助重点项目(40535028);中国科学院知识创新重要方向项目(KZCX3-SW-433)

摘　　要：水溶性有机碳对农业土壤中的碳循环有着重要的作用。通过持续6年的田间试验来研究玉米秸秆还田对土壤水溶性有机碳的影响,共有3种处理:(1)对照;(2)粉碎还田;(3)覆盖还田。结果表明,在6年的秸秆还田试验中,秸秆还田能够增加土壤有机碳和水溶性有机碳的含量(P<0.05),主要是增加了大团聚体组分中有机碳和水溶性有机碳的含量。秸秆不同还田方式对土壤有机碳和水溶性有机碳并没有显著的影响,土壤水溶性有机碳和土壤有机碳有很好的相关性(R2=0.512)。Water soluble organic carbon （WSOC） plays an important role in carbon cycling to agriculture soil, a six continuous years＇ field experiment was conducted to study the effect of corn stock on soil water soluble organic carbon. There were three treatments： （1） control; （2） crushing stock; （3） mulching stock. The results show that the concentrations of soil organic carbon （SOC） and WSOC in plots which received yearly applications of corn stock were significantly higher （P〈0.05） than those of the control in the 6 years, and the concentrations of SOC and WSOC increased mainly in large aggregates. The concentrations of SOC and WSOC were not significantly affected by the different treatments, WSOC concentration was significantly correlated with SOC concentration （R^2= 0.512）.

关 键 词：玉米秸秆 水稳性团聚体 土壤有机碳 水溶性有机碳 

分 类 号：S153[农业科学—土壤学]