人工草地土壤有机碳组分与微生物群落对施氮补水的响应

徐梦,徐丽君,程淑兰,方华军,卢明珠,于光夏,杨艳,耿静,曹子铖,李玉娜

Responses of Soil Organic Carbon Fractionation and Microbial Community to Nitrogen and Water Addition in Artificial Grassland

XU Meng,XU LiJun,CHENG ShuLan,FANG HuaJun,LU MingZhu,YU GuangXia,YANG Yan,GENG Jing,CAO ZiCheng,LI YuNa

表4 3种牧草种植模式下不同水氮处理后的土壤酶化学计量比

Table 4 Responses of enzyme stoichiometric ratios to N and water treatment under three forage cultivation types

处理 Treatment 土壤酶C/N比 Enzyme C/N 土壤酶C/P比 Enzyme C/P βG/NAG CB/NAG βG/AP CB/AP 苜蓿单播 Alfalfa monoculture CK 6.5±0.6c 0.33±0.11b 0.58±0.05a 0.033±0.004a N 12.4±0.6a 0.65±0.11a 0.75±0.06a 0.035±0.006a W 10.2±1.6ab 0.30±0.02b 0.77±0.14a 0.037±0.006a N+W 7.7±1.3bc 0.15±0.04b 0.61±0.13a 0.032±0.001a 无芒雀麦单播 Smooth bromegrass monoculture CK 7.7±0.3a 0.30±0.05a 0.84±0.07a 0.057±0.010a N 6.4±0.1a 0.32±0.01a 0.70±0.07a 0.052±0.009a W 8.0±1.0a 0.32±0.07a 1.47±0.33a 0.069±0.006a N+W 6.8±0.6a 0.28±0.08a 1.25±0.27a 0.087±0.027a 苜蓿-无芒雀麦混播 Mixed cultivation CK 9.9±0.7a 0.32±0.03ab 0.86±0.12a 0.034±0.003b N 9.0±0.4a 0.26±0.05b 0.75±0.08a 0.036±0.002b W 9.5±1.5a 0.40±0.05a 0.91±0.10a 0.038±0.006ab N+W 8.9±0.5a 0.40±0.04a 1.15±0.20a 0.059±0.012a