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

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

表4 土壤理化性状的三因素方差分析

Table 4 Results (P-value) of three-way repeated-measures ANOVAs on soil properties

变异来源 Source of variation pH 含水量 Water content 全氮 TN 铵态氮 NH4+-N 硝态氮 NO3--N 总无机氮 ION 有机碳 SOC 碳氮比 C/N 刈割Mowing NS NS <0.001 NS NS NS 0.029 NS 施氮Nitrogen application <0.001 <0.001 NS <0.001 <0.001 <0.001 NS NS 年份Year 0.036 <0.001 NS — — — <0.001 0.007 刈割×施氮M×N NS NS 0.044 NS NS NS NS NS 刈割×年份M×Y NS NS NS — — — NS NS 施氮×年份N×Y 0.025 0.042 NS — — — NS NS 刈割×施氮×年份M×N×Y NS NS NS — — — NS NS