凋落物输入变化和氮添加对半干旱草原群落生产力及功能群组成的影响

嘎玛达尔基, 杨泽, 谭星儒, 王珊珊, 李伟晶, 游翠海, 王彦兵, 张兵伟, 任婷婷, 陈世苹

Effect of altered litter input and nitrogen addition on ecosystem aboveground primary productivity and plant functional group composition in a semiarid grassland

GAMADAERJI , YANG Ze, TAN Xing-Ru, WANG Shan-Shan, LI Wei-Jing, YOU Cui-Hai, WANG Yan-Bing, ZHANG Bing-Wei, REN Ting-Ting, CHEN Shi-Ping

表2 凋落物输入变化(C)和氮添加(N)对土壤微环境影响的重复测量方差分析(RANOVA)结果

Table 2 Effects of altered litter input (C) and nitrogen addition (N) on soil microenvironment evaluated using repeated measures analysis of variance (RANOVA)

df DOC含量 DOC content DON含量 DON content df Ts SWC 区组 Block 4 0.86 0.39 4 15.61*** 3.99* 凋落物管理 C 2 0.76 0.77 2 14.44*** 10.49*** 氮添加 N 1 28.13*** 61.81*** 1 10.52** 0.12 年 Year (Y) 2 20.14*** 15.33*** 5 780.49*** 302.17*** C × N 2 0.06 0.36 2 0.09 0.52 C × Y 4 1.19 4.08** 10 1.89# 11.12*** N × Y 2 8.41** 5.18* 5 2.20# 8.42*** C × N × Y 4 0.48 3.18* 10 0.32 4.27***