水分和播种方式对土壤速效氮及酶活性的影响  

Effect of Moisture and Sowing Methods on Soil Available Nitrogen and Enzyme Activity

作　　者：张艺桐 张淑艳[1] 杨若琪 谭国娟 周佳铭 ZHANG Yi-tong;ZHANG Shu-yan;YANG Ruo-qi(College of Agriculture,Inner Mongolia University for Nationalities,Tongliao,Inner Mongolia 028000)

机构地区：[1]内蒙古民族大学农学院,内蒙古通辽028000

出　　处：《安徽农业科学》2024年第8期145-148,151,共5页Journal of Anhui Agricultural Sciences

基　　金：内蒙古民族大学科研项目(SX2X2017005)。

摘　　要：[目的]研究水分和混播对土壤氮供给的影响。[方法]以扁穗冰草(Agropyron cristatum)和黄花苜蓿(Medicago falcata)为材料,以单播为对照,研究土壤水分对禾豆混播牧草土壤速效氮含量和土壤酶活性的影响。[结果]土壤速效氮含量和土壤脲酶活性均随水分增加而升高,在田间最大持水量的85%~95%(W_(4))水分下土壤速效氮含量和土壤脲酶活性最高;混播的速效氮含量小于单播黄花苜蓿,但与单播扁穗冰草间无差异。[结论]水分和播种方式对土壤氮的转化与水解均具有重要影响。[Objective]To study the effect of moisture and mixed sowing on soil nitrogen supply.[Method]Using Agropyron cristatum and Medicago falcata as materials and monosowing as a control,the effect of soil moisture on soil available nitrogen content and soil enzyme activity of grass mixed with beans was studied.[Result]The content of soil available nitrogen and soil urease activity both increase with increasing moisture,and the highest soil fast-acting nitrogen content and enzyme activity were found at W_(4)(85%-95%),the maximum water holding capacity in the field.The available nitrogen content of mixed sowing was lower than that of monosowing Medicago falcata,but there was no difference compared to monosowing Agropyron cristatum.[Conclusion]Moisture and sowing method had important effects on soil nitrogen conversion and hydrolysis.

关 键 词：水分 播种方式 土壤速效氮 酶活性 

分 类 号：X171[环境科学与工程—环境科学]