施磷水平对紫花苜蓿生长及草产量的影响  

Effects of Phosphorus Level on Growth and Hay Yield of Alfalfa

作　　者：葛选良[1] 杨恒山[1] 刘晶[1] 王俊慧[1] 张丽妍[1] 

机构地区：[1]内蒙古民族大学农学院,内蒙古通辽028043

出　　处：《内蒙古民族大学学报（自然科学版）》2009年第5期509-513,共5页Journal of Inner Mongolia Minzu University：Natural Sciences

基　　金：内蒙古自然科学基金(20080404MS0306)

摘　　要：2007-2008年在地处西辽河平原的内蒙古民族大学试验农场以6年生紫花苜蓿为试验对象,研究了施磷水平对紫花苜蓿生长及草产量的影响.结果表明:在CK、60 kg/hm2和120 kg/hm2 3个施磷处理下,株高、1级分枝数、节间数和节间距均随施磷水平的升高而增加.施肥当年与第2年,60kg/hm2施磷处理的叶绿素a的含量与120kg/hm2施磷处理的差异显著,且二者与CK的差异达到极显著水平;除施肥第2年的CK处理类胡萝卜素含量显著低于其余2个处理外,不同施磷水平处理的叶绿素b与类胡萝卜素含量差异均不显著.施肥当年,60kg/hm2和120kg/hm2施肥水平下净光合速率差异不大,但均高于CK;施肥第2年,净光合速率总体上随施磷水平的增加而增加.草产量随着施磷水平的升高而增加,施肥当年较第二年更为明显.Using six-year alfalfa as experimental material, researches on effects of phosphorus level on growth and yield of alfalfa were studied on experimental farm of Inner Mongolia University for Nationalities in Xi Liao He Plain in 2007 and 2008. The results showed that： Plant height,number of first branch,internode number and length all increased with the increasing of-phosphorus level. There were obvious differences between phosphorus treatment of 120kg/hm2 and 60kg/ hm2 in content of Chl a, and the two treatments both had significant differences with CK in the first and second fertilizering year; Except for CK in the second fertilizering year, there were no obvious differences content of Chl b and Cxc of different phosphorus level treatments.There were no obvious differences between phosphorus treatment of 120kg/hm2 and 60kg/hm2 in net photosynthetic rate in the first fertilizing year, and the two treatments were both higher than CK; net photosynthetic rate increased with the increasing of phosphorus level in the second fertilizing year. Hay yield increased with the increasing of phosphorus level, especially in the second year.

关 键 词：紫花苜蓿 施磷水平 光合特性 农艺性状 草产量 

分 类 号：S54[农业科学—作物学]