施磷深度对紫花苜蓿生长及草产量的影响  

Effects of Phosphorus Depth on Growth and Yield of Alfalfa

作　　者：刘晶[1] 白晓艳 葛选良[1] 杨恒山[1] 张丽妍[1] 毕文波[1] 

机构地区：[1]内蒙古民族大学农学院,内蒙古通辽028043 [2]呼和浩特市第十一中学,内蒙古呼和浩特010000

出　　处：《内蒙古民族大学学报（自然科学版）》2010年第1期59-61,共3页Journal of Inner Mongolia Minzu University：Natural Sciences

基　　金：内蒙古自然科学基金(20080404MS0306)

摘　　要：2007年5-9月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,研究了施磷深度对紫花苜蓿生长及产量的影响.结果表明:在6cm、12cm和18cm 3个施磷深度处理下,株高差异不显著;1级分枝数在第1茬的差异不显著,在其它各茬的差异较大;处理间节间数差异不显著,节间距在第3茬、第4茬差异亦不显著;叶绿素a和叶绿素b差异显著,而类胡萝卜素差异不显著;年总草产量以6cm施磷处理下最高,且与其它2个施磷处理的差异达到极显著水平;返青率随施磷深度的增加而降低,这与深施磷肥对根系的伤害较重有关.从持续高产的角度来看,紫花苜蓿施磷以浅施为宜.Study on effects of phosphorus depth on growth and yield was carried on with six-year alfalfa on experimental farm of the Inner Mongolia University for Nationalities in Xiliaohe Plain from May to September in 2007. The results showed that： under the three phosphorus depth （6cm, 12cm and 18cm）, differences of plant heights were not obvious; differences of the number ~ft first branch in the first stubble were not obvious but differences in the other three stubble were a little more obvious; differences of node number were not obvious and so did the distance between leaves in the third and fourth stubbles; differences of chlorophyll a and b were obvious but opposite for carotinoid; the whole year yield of 6cm phosphorus treatment was the highest and was significantly different from the other two phosphorus treatments; rates of green returning decreased with the increasing of phosphorus depth, which could be related with root damage in the course of phosphorus fertilizing. Alfalfa phosphorus fertilizing should be shallow from sustainable high yield.

关 键 词：紫花苜蓿 施磷深度 农艺性状 草产量 

分 类 号：S143.2[农业科学—肥料学]