农业环境科学学报2017，Vol.36Issue(10)：2080-2085,6.DOI:10.11654/jaes.2017-0379
土壤微生物与有机物料对盐碱土团聚体形成的影响
Combined effects of soil microbes and organic matter on aggregate formation in saline-alkali soil
摘要
Abstract
Saline-alkali soil is widely distributed in China.The saline-alkali properties of this soil are the primary factors affecting agricultural management.Promoting the formation of soil macro-aggregates is a key step for the improvement of saline-alkali soil.In this study,experiments were conducted to investigate the effects of adding various microbial communities and multiple types of organic matter on formation of soil aggregates in saline-alkali soil.The microbial communities were prepared in soil suspension of saline-alkali and yellow brown soil.In addition,decomposed organic or semi-decomposed organic matter were provided by inoculating maize straw and cow dung.Soil samples were cultured at room temperature for 45 or 90 days.The results showed that treatment with indigenous microorganisms plus semidecomposed organic matter(SS+MS-CD) resulted in the greatest improvement in aggregate formation among all treatments.For example,aggregates of more than 2 mm were increased to 0.62％,whereas no aggregates of more than 2 mm formed in the other treatments.Additionally,the contents of 0.25～2 mm aggregates increased to 14.3％～23.9％ from 0.5％ of CK.Moreover,the pH value decreased around 0.6 pH units,and the population of microorganisms was significantly elevated.Furthermore,the treatment significantly improved the soil enzyme activities and soil respiration intensities.These findings provide insights into the promising applications of saline-alkali soil in agriculture.关键词
青海盐碱土/改良/土壤团聚体/土壤微生物/有机物料Key words
saline-alkali soil in Qinghai/improvement/soil aggregates/soil microorganism/organic matter分类
农业科技引用本文复制引用
杨华,陈莎莎,冯哲叶,邓照亮,李真,王世梅..土壤微生物与有机物料对盐碱土团聚体形成的影响[J].农业环境科学学报,2017,36(10):2080-2085,6.基金项目
国家重点基础研究发展计划(973计划)项目(2015CB150504) （973计划）
国家自然科学基金项目(41671256)The National Basic Research Program of China(2015CB150504):The National Natural Science Foundation of China(41671256) （41671256）
