水肥耦合对高冰草干物质积累和生物产量的影响  

The Influence of the Water and Nitrogen Integrated Condition to the Agropyron Elonglumon's Dry Matter Acculmulationunder and Biological Yield

作　　者：刘静[1] 张淑艳[1] 徐舶[1] 张庆昕[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）》2015年第3期231-234,239,共5页Journal of Inner Mongolia Minzu University：Natural Sciences

基　　金：内蒙古自然科学基金项目(2012MS0505)

摘　　要：设土壤田间持水量的40%、60%、80%3个水分梯度(分别记为W1、W2和W3),0kg/hm2、60kg/hm2、120kg/hm2、180kg/hm2、240 kg/hm2(纯氮量)5个氮肥梯度(分别记为N1、N2、N3、N4和N5),对1年龄高冰草进行水分和氮肥组合处理,研究水氮耦合对高冰草干物质积累和生物产量的影响.结果表明,W1干物质积累的快速期较短,而W2和W3则干物质快速积累期较长;N1比施氮各处理表现为干物质积累慢,曲线上升较缓.第一次刈割地上生物量以W3N3处理最高,为643.33g/㎡,W2N4次之;第二次刈割地上生物量以W2N4最高,为613.33g/㎡,W2N3次之.全年生物量以W2N4处理最高,为1227.76g/㎡,与W2N3处理无显著差异,但显著高于其他处理组合,W2N4比W2N3高3.2%.This study was carried on in the farm of Inner Mongolia university for nationalities. In order to analyze the influence of water and nitrogen management to agropyron elonglumon’s dry matter acculmulationunder and biologi-cal yield, deal with the water and nitrogen fertilizer combination for the one year old agropyron elonglumon ,we set three moisture gradients about soil field capacity by 40%, 60%, 80%and 0 kg/hm2, 60 kg/hm2, 120 kg/hm2, 180 kg/hm2, 240 kg/hm2(pure nitrogen)5 nitrogen gradient.(marked by N1,N2,N3,N4,N5), the result showed that the peri-od of dry matter accumulation was short in W1 level, but W2 and W3 level were in contrary. And the period of dry matter accumulation was longer in N1 level than other levels . When we got the biomass in the first time ,W3N3 level get the highest biomass ,the quality is 643.33g/㎡,the quality of W2N4 followed W3N3 level .When the second time we got the biomass ,W2N4 level is in the highest quality ,the number was 613.33g/㎡,W2N3 followed it .But as the analysis for the year around ,the highest biomass is in the level of W2N4,the number is 1227.76/㎡,this number is ob-vious higher than other levels ,and another level W2N3’s number is very nearly to W2N4, W2N3’s number was just lower 3.2%than W2N4.

关 键 词：高冰草 水氮耦合 干物质积累 生物量 

分 类 号：S543[农业科学—作物学]