摘要
本文简要介绍了稀土元素在牧草上应用的研究结果。采用合适的稀土溶液浓度和施用方法可提高牧草种子出苗率,增加分蘖数,并能增加牧草的绿叶面积和叶绿素含量,提高光合作用强度。促使豆科牧草根瘤数量增多及增强根瘤的固氮酶活性,并改善牧草生长的土壤环境。从而增加牧草植株高度与干物质积累,改善牧草品质,使牧草产量增加。小区试验平均增产21.5%,大面积试用示范平均增产16%左右。产投比为6.9∶1～35.1∶1,经济效益较明显。
Using proper rare—earth solution concentration and spreading way,the seedling rate can be raised, the tillering number,the green—leafarea and the content of chlorophyll increased and the intensity of pho- tosynthesis can rise.It can make the root nodule increase and the nitrogenatic activity raise for useing rare —earth element.The soil enviroment was changed well.The height of grass increased and the dry matter stored up,the grass quality was improved,the grass yield had increased.The average yields increased 21.5% in small area test and about 16% in large area.The output:input was 6.9:1～35.1:1,the economic profitability is obvious.
出处
《草业科学》
CAS
CSCD
北大核心
1992年第6期48-52,共5页
Pratacultural Science
关键词
稀土
肥料
牧草
应用
Rare-earth element
seedling rate
tillering number
nitrogenatic activity
