玉米与蚕豆秸秆配施对秸秆分解及土壤养分含量的影响  

Effects of combined application of maize-and horsebean straws on the straws decomposition and soil nutrient contents

作　　者：夏志敏[1,2] 周建斌[2] 梅沛沛[3] 王平[4] 桂林国[4] 李隆[4] 

机构地区：[1]西北农林科技大学林学院,陕西杨凌712100 [2]西北农林科技大学资源环境学院,陕西杨凌712100 [3]中国农业大学资源与环境学院,北京100094 [4]宁夏农林科学院资源与环境研究所,银川750002

出　　处：《应用生态学报》2012年第1期103-108,共6页Chinese Journal of Applied Ecology

基　　金：国家"十一五"科技支撑计划项目(2007BAD89B02);国家自然科学基金项目(40571087);西北农林科技大学创新团队项目资助

摘　　要：采用室内培养试验研究了禾本科作物玉米秸秆和豆科作物蚕豆秸秆单施及其不同比例配施后的秸秆分解及土壤养分含量.结果表明:单施玉米秸秆,土壤有机碳的矿化量和秸秆有机碳的矿化速率都较低,土壤矿质态氮被固持的时间也最长;玉米秸秆与蚕豆秸秆配合施用促进了秸秆有机碳和土壤固持矿质态氮的矿化.两种秸秆单施和配施均显著增加土壤微生物生物量碳、氮含量.禾本科作物秸秆与豆科作物秸秆配合施用,可以加快秸秆的分解,协调养分供应.A laboratory incubation experiment was conducted to study the straw decomposition and soil nutrient contents after single and combined applications of maize- and horsebean straws. With the single application of maize straw, the mineralization rates of the straw and soil organic C were lower, and the immobilization of soil mineral N sustained longest. Combined application of maize- and horsebean straws promoted the mineralization of the straws organic C and soil immobilized N. Both single and combined application of the straws increased the contents of soil microbial biomass C and N significantly. It was suggested that a combined application of gramineous and leguminous straws could promote the straws decomposition and harmonize the soil nutrient supply.

关 键 词：玉米秸秆 蚕豆秸秆 有机碳矿化 土壤微生物生物量碳、氮 矿质氮 

分 类 号：S158[农业科学—土壤学]