降水量对半干旱沙质草地土壤胞外酶活性的影响

降水量对半干旱沙质草地土壤胞外酶活性的影响

景家琪, 刘新平, 何玉惠, 丰洁, 胡鸿姣, 徐远志, 张尧

Influence of precipitation on soil enzyme activity in sandy grasslands

Jiaqi Jing, Xinping Liu, Yuhui He, Jie Feng, Hongjiao Hu, Yuanzhi Xu, Yao Zhang

表1 降水变化对土壤理化性质的影响

Table 1 Effect of precipitation change on soil physical and chemical index

土壤理化指标	处理
土壤理化指标	P+60%	P+30%	CK	P-30%	P-60%
容重BD/(g·cm⁻¹)	1.533±0.026^ab	1.569±0.018^ab	1.503±0.020^a	1.587±0.017^b	1.540±0.010^ab
酸碱度pH值	7.276±0.072^a	7.208±0.091^a	7.146±0.030^a	7.214±0.051^a	7.340±0.089^a
电导率EC/(S·m⁻¹)	28.20±0.819^a	27.16±1.951^a	27.00±0.804^a	36.60±2.888^b	33.22±2.659^ab
全碳TC/(g·kg⁻¹)	0.276±0.043^a	0.191±0.034^a	0.249±0.047^a	0.295±0.049^a	0.258±0.039^a
全氮TN/(g·kg⁻¹)	0.033±0.008^a	0.025±0.004^a	0.032±0.005^a	0.030±0.003^a	0.037±0.009^a
全磷TP/(g·kg⁻¹)	0.024±0.001^a	0.023±0.001^a	0.025±0.003^a	0.026±0.003^a	0.026±0.003^a
土壤碳氮比C∶N	13.199±5.563^a	7.920±1.740^a	7.685±0.860^a	10.342±1.718^a	8.555±1.671^a
土壤碳磷比C∶P	11.416±1.607^a	8.135±1.290^a	10.738±2.683^a	11.273±1.478^a	9.951±1.607^a
土壤氮磷比N∶P	1.362±0.343^a	1.080±0.122^a	1.382±0.319^a	1.197±0.212^a	1.379±0.366^a