摘要
为了明确农业利用对土壤的黏粒矿物组成差异及养分的影响;通过在东北黑土定点和历时8年的现代农业开垦利用,以研究东北黑土的黏粒矿物组成差异及养分的影响;经过8年的农业开垦利用后,东北黑土的风化进程加强,0.002～0.02 mm粉粒含量显著降低(F=5.84>P0.01=0.026),而黏粒含量因水土流失,增加未达到显著;土壤交换性离子活性较强,酸化程度加重,有机质含量降低,对养分保蓄能力明显下降。土壤中的伊利石含量极显著降低(F=11.25>P0.01=0.003),而高岭石和蒙脱石含量极显著增加(F=11.67>P0.01=0.003;F=13.89>P0.01=0.001),S/I混层矿物含量也较8年前的高;土壤黏粒矿物是极为敏感的胶体类型,它的改变会影响土壤肥力特征。
In order to identify the effect of agricultural use on clay minerals and nutrient of soil,the study of modern agriculture use of black soil in Northeast China has lasted for 8 years.Clay mineral composition and nutrient of black soil were investigated.The results showed that the weathering process of the black soil was strengthened.The content of silt fraction between 0.002 and 0.02mm was significantly decreased,while the content of clay fraction increase was not significant for soil erosion.Soil exchangeable ion activity was strong,degree of acidification was increased,organic matter content decreased,and the nutrient holding capability decreased.The content of illite in soil was significantly lower,while the content of kaolinite and montmorillonite were significantly increased.The content of S / I mixed-layer mineral is higher than before 8 years.Soil clay minerals were a very sensitive type colloid,and its changes affected soil fertility characteristics.
出处
《吉林农业科学》
CSCD
2011年第5期29-32,共4页
Journal of Jilin Agricultural Sciences
基金
国家沃土工程项目(2006BAD25B05)
粮食丰产工程项目(2006BAD02A10)
863项目(2006AA10A309)
国家公益性行业(农业)科研专项经费项目(200903001)
内蒙古民族大学博士硕士启动资金项目(BS262)
关键词
黏粒矿物
黑土
农业利用
养分
Clay Minerals
Black Soil
Agricultural Use
Nutrient
