刈割频率对杂交狼尾草生长和产量的影响  

Effect of defoliation frequency on the growing characteristics and yield of Pennisetum americanum × P. purpureum

作　　者：林永辉[1] 唐龙飞[1] 黄秀声[1] 冯德庆[1] 陈钟佃[1] 

机构地区：[1]福建省农业科学院农业生态研究所,福建福州350013

出　　处：《福建农业学报》2006年第4期389-392,共4页Fujian Journal of Agricultural Sciences

基　　金：福州市科技局科研攻关项目(2004-45)

摘　　要：在地力中等、两种施肥水平条件下研究了刈割频率对杂交狼尾草生长性状的影响。结果表明,30 d、45 d和60 d刈割周期处理的杂交狼尾草全年生物量分别为193.48 t.hm-2、269.75 t.hm-2和237.77 t.hm-2。刈割促进杂交狼尾草的分蘖,但频繁刈割(30 d)造成杂交狼尾草地上部生物量下降,根系衰竭;60 d刈割周期造成生物量减少、茎/叶比增加;45 d刈割周期处理的杂交狼尾草产量和生长性状对草食动物的畜牧利用比较理想。Effect of defoliation frequency on the growing characteristics and yield of Penniseturn americananm × P. purpureurn were studied under the condition of middle soil fertility and two fertilization rates. The results showed that the annual biomass amounts in the treatments of 30 d, 45 d and 60 d defoliation interval were 193.48 t · hm^-2 , 269.75 t · hm^-2 and 237.77 t · hm^-2 respectively. Defoliation stimulated the tillering trend of Pennisetum americanum × P. purpureum, however, frequent defoliation （30 d） reduced the up-ground biomass, caused the exhaustion of root system. Defoliation in long-term recycle （60 d） resulted in a reduction of biomass production, an increase of stem/leaf ratio, The biomass and growing characteristics of Pennisetum americanum × P. purpureum in the treatment of 45d defoliation interval were more ideal for its husbandry utilization of grass-eating animals.

关 键 词：杂交狼尾草 刈割周期 茎叶比 生物量 

分 类 号：S543.9[农业科学—作物学]