【作者】 张鹤山； 刘洋； 田宏； 蔡化； 王凤； 陈明新；

【Author】 ZHANG He-shan,LIU Yang,TIAN Hong,CAI Hua,WANG Feng,CHEN Ming-xin (Institude of Animal Science,Hubei Academy of Agricultural Science,Wuhan 430064,China)

【机构】 湖北省农业科学院畜牧兽医研究所；

【摘要】 通过不同刈割处理对白三叶生长状况和越夏性能进行了研究。结果表明:白三叶根干重、茎节数及越夏率随留茬高度和刈割周期的增加而升高,牧草产量只随留茬高度先增后减,受刈割周期影响不显著。留茬7cm且刈割周期不低于30d最利于白三叶根系、茎节的生长和越夏力的提高,与其他处理差异极显著(P<0.01);留茬高度是影响牧草产量的主效因子,其中以留茬4cm处理为佳,且显著高于其他留茬处理(P<0.01),但同一留茬水平下不同刈割周期间差异不显著。根系的生长状况和茎节数量多少是影响白三叶越夏性强弱的直接因子,相关性分析表明,越夏率具有和茎节数与根干重一致的变化趋势,量极显著相关,相关系数分别为0.966和0.930。更多还原

【Abstract】 The growth status and heat-resistance capability of White clover treated by different cutting regimes was studied.The results showed that the dry root weight,amount of cauline burl and heat-resistance enhanced gradually with the increase of stubble height and cutting interval.The total herbage yield increased,and then decreased with the hoist of stubble height. Meanwhile,the herbage yield was affected by stubble height only.The treatment that stubble height and cutting interval are 7cm and 30～45d,respectively not only enhanced root weight and quantity of cauline burl,but also improved the heat-resistance of White clover,and it was significant difference from other treatments(p<0.01).The stubble height was a main factor to influence herbage yield of White clover.The herbage yield under the treatment of 4cm exceed markedly other one(p<0.01)but the difference was not significant between different cutting interval under the same stubble height.The heat-resistance of White clover was attributed directly to the root’s growth status and the quantity of alive cauline burl.The resuits of relativity analysis indicated that the heat-resistance was relative greatly to the root weight and cauline burls,and the coefficient was 0.930 and 0.966,respectively,which made their values change in the same trend.更多还原