干旱地区农业研究2017，Vol.35Issue(5)：26-34,9.DOI:10.7606/j.issn.1000-7601.2017.05.05
膨润土对燕麦苗期土壤水分及生物学性状的影响
The effects of bentonite on soil moisture and biological characteristics of oat at seedling stage
摘要
Abstract
To investigate the role of bentonite soil supplement on water retention and soil amelioration as well as seedling protection in the dry farming regions of Inner Mongolia Loess Plateau,a field experiment with (0(CK),and 6 000(D 1),12 000 (D2),18 000(D3),24 000(D4) and 30 000 kg· hm-2 (D5)) of bentonite was applied.Mter one-time application in 2011,the effects of application rates on oat seeding characterization and soil moisture content,microbial biomass carbon,microbial biomass nitrogen and soil enzyme activity were examined in 2012-2015.The results showed that one-time application can improve the emergence rate,in 2012,D2 and D3 were higher than that of control with 11.41％ and 8.93％ respectively;in 2013,D3 and D4 were higher than that of control with 8.39％,5.56％ respectively;performance in 2014,D4 and D5 compared with the control improved (increased) to 10.25％ and 8.32％ respectively;in 2015 D4 and D5,were 8.71％,7.48％ respectively higher than the control.One-time application of bentonite raised soil water content in the soil profile (0～ 100 cm),with the most significant increase of 1.21％ ～40.76％ at the 10 ～ 20 cm layer.Compared to the CK treatment,bentonite increased soil microbial biomass carbon (2.92 ％ ～ 31.42 ％),nitrogen (5.05 ％ ～ 47.15 ％),catalase (4.75 ％ ～ 45.89 ％),invertase (2.73 ％ ～ 49.91％),urease (6.67％ ～70.00％) in the top 10 cm soil.It was concluded that the application of bentonite can obviously improve soil water retention,water holding capacity and soil biological traits in the plough layer during the oat seedling growth period.With time,the long-lasting effect of higher application rates of bentonite became more evident.关键词
膨润土/出苗率/土壤含水量/生物学性状Key words
bentonite/rate of emergence/soil moisture content/biological characteristics分类
农业科技引用本文复制引用
孙梦媛,刘景辉,马斌,张翼超,严威凯,马保罗..膨润土对燕麦苗期土壤水分及生物学性状的影响[J].干旱地区农业研究,2017,35(5):26-34,9.基金项目
国家科技计划课题(2015BAD22B04-02) （2015BAD22B04-02）
国家自然科学基金项目(31160276) （31160276）
内蒙古自治区“草原英才”创新团队-“燕麦种质资源创新与利用创新人才团队” （）
内蒙古自治区科技创新团队-“内蒙古自治区燕麦种质资源创新与利用科技创新团队” （）
全国农业科研杰出人才及其创新团队-“燕麦种质资源创新与利用科技创新团队” （）
