摘要
以中苜2号紫花苜蓿为研究对象,采用"3414"试验设计,在内蒙古土默特左旗沟子板村蒙草抗旱苜蓿试验基地进行施肥试验,结果表明:适量的N、P肥能促进苜蓿产量增加,K肥抑制苜蓿产量增加。施肥处理中P_3K_2N_2产量最高,为14204kg/hm^2。施肥处理的干草产量表现为:无K处理>NPK处理>无P处理>无N处理>不施肥处理,产量比不施肥处理分别高31.18%、30.21%、5.21%、3.60%。苜蓿产量与N肥、P肥、K肥的一元二次拟合方程为:Y=10181+46.089394N-0.166307N^2、Y=10598+126.921295P-1.178216P^2和Y=12923+20.824437K-0.261471K^2,根据方程得到N、P、K最大施肥量分别为138.57kg/hm^2、53.86kg/hm^2、39.82kg/hm^2。
Medicago sativacv.Zhongmu No.2was taken as the object,3414 experiment design was adopted,fertilizing experiment was conducted in Tumotezuoqi,Inner Mongolia.The results showed that：The yields of alfalfa were increased under appropriate nitrogenous and phosphorus fertilizer,but decreased when the potassium were used.The highest yield was 14204 kg per hectare in the treatment of P_3K_2N_2.The yield from high to low was potassium fertilizer deficiency treatment,phosphorus fertilizer deficiency treatment,nitrogenous fertilizer deficiency treatment,which increased by 31.18%,5.21% and 3.60% respectively than no fertilizer treatment.The equations between yield and N,P,K were Y=10181＋46.089394N-0.166307N^2,Y=10598＋126.921295P-1.178216P^2 and Y=12923＋20.824437K-0.261471K^2,respectively.According to these equation,the largest N,P and K were 138.57kg/hm^2,53.86kg/hm^2,39.82kg/hm^2,respectively.
作者
李星月
米福贵
孟凯
肖燕子
韩亚琼
LI Xing-yue MI Fu-gui MENG Kai XIAO Yan-zi HAN Ya-qiong(College of Grassland and Resources and Environment, Inner Mongolia Agricultural University, Hohhot 010019, China Inner Mongolia M-Grass Ecology and Environment （Group） Co. , Ltd. , Hohhot 010010, China)
出处
《中国草地学报》
CSCD
北大核心
2017年第2期26-32,共7页
Chinese Journal of Grassland
基金
国家自然科学基金项目(31460110)
内蒙古农业大学教育部草业与草地资源重点实验室资助
