草甸草原区退耕地的牧草-水分-氮肥耦合机制

李达,方华军,王笛,徐丽君,唐雪娟,辛晓平,聂莹莹,乌仁其其格

Coupling Mechanism of Herbage-Water-Nitrogen Fertilizer in Abandoned Farmland in Meadow Steppe

LI Da,FANG HuaJun,WANG Di,XU LiJun,TANG XueJuan,XIN XiaoPing,NIE YingYing,Wuren qiqige

表2 方差分析评估氮水平、补水、牧草类型及其相互作用对牧草生物量的影响

Table 2 Summary of ANOVA evaluating the effects of N, I , P, and their interactions on dry weight

Source of variation 2016 2017 F P F P 氮 Nitrogen 0.200 n.s. 6.281 *(0.034) 水 Irrigation 0.067 n.s. 4.951 n.s. 牧草 Pasture 1.738 n.s. 21.827 **(0.002) 氮×水 Nitrogen×Irrigation 0.090 n.s. 0.875 n.s. 水×牧草 Irrigation×Pasture 0.752 n.s. 19.640 **(<0.01) 牧草×氮 Pasture×Nitrogen 0.438 n.s. 23.888 **(0.001) 水×牧草×氮Irrigation×Pasture×Nitrogen 1.099 n.s. 4.270 *(0.022)