摘要
研究黄土高原长期种植紫花苜蓿地的土壤酶活性季节性变化,同时测定紫花苜蓿种植1、2、4、11和16年土壤中的脲酶、碱性磷酸酶、蔗糖酶和过氧化氢酶的活性。结果表明:土壤脲酶、碱性磷酸酶、过氧化氢酶和蔗糖酶的活性受到紫花苜蓿的种植年限、季节和土层深度的影响。不同种植年限紫花苜蓿地土壤酶活性与季节呈显著相关,土壤脲酶和碱性磷酸酶的活性表现为6月较高,蔗糖酶活性3月较高,而过氧化氢酶活性差异不显著。紫花苜蓿地土壤酶活性具表层富集性,在0～5cm土层中脲酶、蔗糖酶和磷酸酶活性高于5～10cm土层的1～3倍,而过氧化氢酶酶活性在土层之间差异不显著。种植4年紫花苜蓿地土壤酶活性较高,种植11、16年的土壤酶活性显著下降。可见,种植紫花苜蓿达10年以上土壤酶活性下降明显,需加强人工牧草地管理。
The seasonal dynamics of soil enzyme activity in alfalfa field with different planting ages in Loess Plateau were studied.The activity change of soil urease,alkaline phosphatase,invertase and catalase were measured in alfalfa fields with 1,2,4,11 and 16 planting ages.The results showed that the soil enzyme activity changed seasonally with different planting ages,the activity of soil urease,alkaline phosphatase and catalase was the highest in June,the invertase activity was the highest in March;the soil enzyme activity when alfalfa was planted for 4 years increased obviously,and it significantly decreased in 16 years.The activity of soil invertase,urease and phosphatase in 0~5 cm soil layer was 1 to 3 times higher than that in 5 to 10 cm,while catalase activity did not significantly change between 0~5 cm and 5~10 cm layer.
作者
韩国君
何明珠
黄海霞
马乐元
陈年来
HAN Guo-jun;HE Ming-zhu;HUANG Hai-xia;MA Le-yuan(College of Resources and Environmental Sciences,Gansu Agricultural University,Lanzhou 730070, China;Northwest Institute of Eco-environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China)
出处
《草原与草坪》
CAS
CSCD
2018年第5期59-64,共6页
Grassland and Turf
基金
甘肃农业大学科技创新基金(GSAUXKJS-2018209)
国家自然科学基金(41671103)资助
作者简介
韩国君(1977-),男,副教授,主要研究方向为植物水分和养分生理生态。E-mail:hangj@gsau.edu.cn;陈年来为通讯作者。E-mail:chennl@gsau.edu.cn。
