刈割频度对王草再生性能及营养价值的影响  

The influence of mowing frequency on grazing regrowth and nutrition of pennisetum xP.americanum cv.No.4

作　　者：张明忠[1] 朱红业[1] 冯光恒[1] 张映翠 龙会英[1] 金杰[1] 史亮涛[1] 江功武[1] 杨洪祥[1] 

机构地区：[1]云南省农业科学院热区生态农业研究所,云南元谋651300 [2]楚雄州烟草科学研究所,云南楚雄675000

出　　处：《西南农业学报》2006年第B09期222-224,共3页Southwest China Journal of Agricultural Sciences

基　　金：国家“十五”科技攻关项目“干热河谷生态恢复技术与示范”（2001BA606A-07-01）;云南省环境保护局“元谋干热河谷生态恢复技术示范”（云财建2005年144号）.

摘　　要：以不同生长周期进行刈割新建植的热带牧草-王草，对其生物学特性和牧草产量的影响试验，得出干热区雨养条件下王草再生性能达最佳时的生长期和刈割次数。试验结果表明：作为青刈饲喂或青贮的牧草，王草生长期一般在3545d，经济性状较好；作为种苗生长期保持在90d产量较高。高频率刈割可减少王草生长期的拔节数，提高生长期分蘖数和粗壮度。The biological characteristic and yield ofpennisetum xP.americanum cv.No.4 was studied, which is a new planted tropic pasture through different growing cycle cutting. The best growing period and cutting times ofpennisetum xP.americanum cv.No.4 for it＂ s regrowth under rain-mowing in dry hot area was get. The result showed that as a greenness for forage depasturing or silage, the better economic quality was in it＇s 33-45 growing days; as a seedling period in it＇s 90 growing days, the yield was highest. The high frequent cutting could decrease the jointing number and improve the tiUering number and sturdiness degree in growing period.

关 键 词：王草 刈割频度 再生性能 雨养型 干热区 

分 类 号：S812.8[农业科学—草业科学]