播量对黄花苜蓿草产量与种子生产的影响  

Effects of Seeding Rates on Forage Yields and Seed Productions of Medicago falcata

作　　者：古琛[1] 刘佳月[2] 杜宇凡 陈万杰[1] 赵萌莉[1] 

机构地区：[1]内蒙古农业大学生态环境学院,内蒙古呼和浩特010019 [2]中国农业科学院草原研究所,内蒙古呼和浩特010010

出　　处：《中国草地学报》2016年第2期86-91,共6页Chinese Journal of Grassland

基　　金：国家科技支撑项目(2012BAD13B00);内蒙古农业大学草业与草地资源重点实验室资助

摘　　要：试验以黄花苜蓿为研究对象,在呼伦贝尔草甸草原进行固定行距为30cm的播量试验,探讨了播量对黄花苜蓿草产量及种子产量的影响规律。结果表明：随着播量的增大,黄花苜蓿的草产量、分枝数、每枝小花数、结荚数和种子粒数均呈先增加后减少的趋势。当播量为10.5kg/hm^2时,分枝数与草产量显著（P〈0.05）高于其他处理,且二者之间呈显著正相关（P〈0.05）,回归方程Y=34.06X＋2064;播量为14kg/hm^2时,每枝小花数、结荚数和种子数最多（P〈0.05）,而且结荚数与种子数呈显著正相关（P〈0.05）,回归方程为Y=2.626X-0.241。若在生产过程中同时兼顾草产量与种子产量,最适的播量范围是10.5-14kg/hm^2。Medicago falcata was taken as the subject to explore the effects of seeding rates on the forage yields as well as seed productions in meadow steppe of Hulunbeir under the fixed row spacing of 30 cm.The results indicated that when the seeding rates increased,the forage yields,numbers of branch,numbers of floret,pod and seed for each branch of Medicago falcata raised at first and then dropped down.There was a significant correlation between forage yields and numbers of branch（P〈0.05）,and the regression equation was Y = 34.06 X ＋ 2064.The numbers of branch and forage yields were significant higher than other treatments under the seeding rate of 10.5kg·hm^-2（P〈0.05）.However,the numbers of floret,pod and seed were maximum when the seeding rate was 14kg·hm^2（P〈0.05）.Meanwhile,the numbers of pod and seed were significantly positively correlated to seed yield and the regression equation was Y = 2.626X- 0.241.If the yields of both forage and seed were taken into consideration at the same time,the optimal range of seeding rate was 10.5-14kg·hm^2.

关 键 词：播量 黄花苜蓿 草产量 种子生产 

分 类 号：S541[农业科学—作物学]