施氮与刈割留茬高度对草场生产力及植物群落组成的影响
王开丽,杨合龙,肖红,孙伟,戎郁萍(
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Effects of Nitrogen Application and Clipping Height on Vegetation Productivity and Plant Community Composition of Haying Meadow Steppe
WANG KaiLi,YANG HeLong,XIAO Hong,SUN Wei,RONG YuPing()
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图2. 施氮量和刈割留茬高度对草地主要植物类群重要值的影响
数据为均值±标准误,不同的字母代表不同施氮量间差异显著（P<0.05）。*,**和***分别代表不同刈割留茬高度间显著性差异水平为P<0.05,P<0.01,P<0.001
Fig. 2. Effects of nitrogen addition rate and mowing height on the important value (IV) of crucial species
Values (Mean ± SE) followed by different letters represent significantly different within each N gradient at P<0.05. *, ** and *** represent significantly different within mowing height at P<0.05, P<0.01 and P<0.001, respectively
