不同形态和水平的氮添加对内蒙古草甸草原土壤净氮矿化潜力的影响

李阳,徐小惠,孙伟,申颜,任婷婷,黄建辉,王常慧

Effects of different forms and levels of N additions on soil potential net N mineralization rate in meadow steppe, Nei Mongol, China

LI Yang,XU Xiao-Hui,SUN Wei,SHEN Yan,REN Ting-Ting,HUANG Jian-Hui,WANG Chang-Hui

表1 不同形态、不同水平氮添加双因素对内蒙古草甸草原土壤理化性质的主效应及其交互效应的方差分析(p值)

Table 1 Results (p-values) of two-way ANOVA on the effects of addition nitrogen forms, nitrogen levels and their interactions on soil physicochemical properties in the meadow steppe in Nei Mongol

pH 速效磷含量 Available P content 全磷含量 Total P content 全氮含量 Total N content 有机碳含量 Organic carbon content d.f. F p d.f. F p d.f. F p d.f. F p d.f. F p 氮形态 N form (F) 4 14.87 <0.001 4 1.93 0.12 4 1.43 0.24 4 0.28 0.89 4 0.72 0.59 氮水平 N level (L) 5 32.21 <0.001 5 14.82 <0.001 5 1.40 0.24 5 3.59 0.007 5 4.23 0.002 F × L 20 2.84 0.001 20 5.13 <0.001 20 0.94 0.54 20 0.80 0.71 20 3.35 <0.001