干旱地区农业研究Issue(2)：152-158,7.DOI:10.16302/j.cnki.1000-7601.2015.02.025
促腐条件下小麦玉米秸秆还田土壤养分变化特征研究
Dynamic characteristics of fertilized soil with wheat and corn straws under decomposition conditions
摘要
Abstract
Dingxi City Lee Town is a typical dry farming area in the Loess Plateau .In this area ,agricultural pro-duction usually uses a planting method ,named whole film double furrow sowing .In this research ,to investigate the dy-namic characteristics of soil nutrients and soil microbial biomass during the process of decomposing wheat and corn straw for 120 d ,a pot cultivation method ,simulating the actual planted production in this area ,was employed by adding differ-ent kinds of straws .The results showed that after 120 days of decomposition ,the increasing rates of soil organic matter and nitrogen with each treatment tended to increase in the early time ,and then became decreased .The rates of soil phos-phorus and potassium appeared an increase - decrease - increase - decrease trend .Fields with straw return by adding de-composition accelerators could improve the increasing rates of soil nutrients .The soil nutrients using different straws with the decomposition accelerator F3 (including Bacillus ,filamentous fungi ,actinomycetes and yeasts with special features ) were higher than those with other treatments .The soil nutrients using different straw treatments with the same decomposi -tion accelerator performance in an order of the following :WF1 > CF1 ,WF2 ≥ CF2 ,and WF3 < CF3 .It was concluded that among three different decomposition accelerators ,F1 (obtained through multiple aerobic complex strains with a strong ability to decompose cellulose ,hemicelluloses ,lignin and other organic ingredients of organic wastes ) was the best in promoting the decomposition of wheat ,and F2 (rich in microbial flora which contains straw decomposing ingredient such as cellulose ,hemicelluloses ,lignin and other bio - organic substances) played a same role in promoting wheat and corn straw decompositions .关键词
秸秆还田/小麦秸秆/玉米秸秆/腐解剂/土壤养分/动态特征Key words
straw returning/wheat straw/corn straw/decomposed agent/soil nutrients/dynamic characteristics分类
农业科技引用本文复制引用
牛怡,张仁陟,蔡立群,张军,岳丹,周欢..促腐条件下小麦玉米秸秆还田土壤养分变化特征研究[J].干旱地区农业研究,2015,(2):152-158,7.基金项目
国家自然基金项目（31160269）；“十二?五”《循环农业科技工程》（2012BAD14B03）；甘肃省干旱生境作物学重点实验室-省部共建国家重点实验室培育基地开放基金课题（GSCS －2013－13）；甘肃省高等学校研究生导师科研项目计划 （）
