磷酸二氢钾叶面不同喷施时期对紫花苜蓿的影响  

The Influences of KH_2PO_4 Sprayed on Leaves on the Alfalfa

作　　者：肖艳云[1] 杨恒山[1] 张宏宇[1] 田立双[1] 张丽妍[1] 

机构地区：[1]内蒙古民族大学,内蒙古通辽028000

出　　处：《中国草地学报》2008年第1期61-65,共5页Chinese Journal of Grassland

基　　金：内蒙古自然科学基金项目"农区与奶牛饲养相适应的饲草优化种植模式研究"(200508010316)

摘　　要：以五年生紫花苜蓿阿尔冈金为试验材料,在内蒙古民族大学农场以4g/kg磷酸二氢钾(KH2PO4)水溶液进行叶面喷施试验。结果表明:喷施效果最好的时间组合是刈后第7d喷施+刈后第21d喷施,其次为刈后当日喷施+刈后第21d喷施,而刈后第14d喷施+刈后第21d喷施增产甚少。刈后第7d喷施+刈后第21d喷施在株高、节间数、节间距和分枝数等各指标上均具有优势。Using five-year Medicago sativa L. cv. Algonquin as experiment materials, the leaf blades were sprayed with the KH2PO4 in the farm of Inner Mongolia University For Nationalities in the year 2006. The results showed that the optimal spraying time is the 7th day after cutting and the 21st day after cutting. The second was the spraying the same day after cutting and spraying after 21 days of cutting. The last is the spraying after the 14 days of cutting and spraying after the 21 days of cutting. Alfalfa sprayed with KH2PO4 on 7th day and 21st day after cutting takes advantage in the height of plant, the internode number, the internode length , the branches and so on.

关 键 词：紫花苜蓿 磷酸二氢钾 生物学性状 草产量 

分 类 号：S812.4[农业科学—草业科学]