草业学报2018，Vol.27Issue(1)：53-61,9.DOI:10.11686/cyxb2017265
呼伦贝尔人工栽培草地土壤微生物对无芒雀麦不同播种密度的响应
Effect of sowing density of Bromus inermis on soil microbial characteristics and enzyme activities
摘要
Abstract
In this study,an experiment with different sowing densities of Bromus inermis:W1 (7.5 kg · ha-1),W2 (15 kg · ha 1),W3 (22.5 kg · ha-1),W4 (30 kg · ha-1) and W5 (37.5 kg · ha-1) was conducted to investigate the effect of sowing density on soil microbial characteristics and enzyme (urease,phosphatase and catalase) activities.The aboveground biomass of B.inermis increased with sowing density to W4 (30.0 kg · ha-1),and then was decreased at W5 compared to W4.There was no significant difference between the sowing densities in belowground biomass.For microbial biomass-C,the lowest values occurred at medium sowing densities.Microbial biomass-N in the 0-10 cm soil layer barely changed with sowing density,while in the 10-20 cm soil layer it decreased with increasing sowing density.The soil enzyme activity in the first cutting period was significantly higher than that in the second cutting period,but there was no significant difference among sowing densities within the same regrowth period.Soil microbial characteristics and enzyme activities were optimized at W4 (30.0 kg · ha-1).关键词
无芒雀麦/播种密度/微生物特性/酶活性Key words
Bromus inermis/sowing density/microbiologic properties/enzymatic activity引用本文复制引用
李达,王笛,陈金强,辛晓平,徐丽君,杨桂霞,唐雪娟,郭明英..呼伦贝尔人工栽培草地土壤微生物对无芒雀麦不同播种密度的响应[J].草业学报,2018,27(1):53-61,9.基金项目
“重点研发计划”(2016YFC0500603),“973”人工草地生产力形成机理与调控途径(2015CB150800),现代农业产业技术体系建设专项资金(Cars-35)和中央级公益性科研院所基本科研业务费专项(647-53)资助. （2016YFC0500603）
