滇南喀斯特地区不同季节土壤和灌木叶片化学计量特征及对水分添加的响应

敬洪霞,孙宁骁,Muhammad UMAIR,刘春江,杜红梅

Stoichiometric characteristics of soils and dominant shrub leaves and their responses to water addition in different seasons in degraded karst areas in Southern Yunnan of China

JING Hong-Xia,SUN Ning-Xiao,Muhammad UMAIR,LIU Chun-Jiang,DU Hong-Mei

表1 滇南喀斯特地区不同水分处理组旱季(4月)和雨季(8月)的土壤相关指标(平均值±标准误差)

Table 1 Soil variables under different water treatments and in different months in degraded karst areas in Southern Yunnan of China (mean ± SE)

指标 Index 4月 April 8月 August Pr CK T1 T2 T3 CK T1 T2 T3 f1 f2 f1 × f2 pH 6.25 ± 0.07 6.38 ± 0.13 6.26 ± 0.07 6.32 ± 0.12 6.13 ± 0.12 6.27 ± 0.11 6.23 ± 0.06 6.31 ± 0.06 VWC (%) 3.11 ± 0.39 5.79 ± 0.40 8.09 ± 0.21 6.59 ± 0.72 10.33 ± 0.19 19.72 ± 0.25 26.81 ± 0.32 26.19 ± 0.32 Temperature (℃) 18.96 ± 0.17 18.64 ± 0.16 19.49 ± 0.19 18.82 ± 0.15 21.91 ± 0.07 21.89 ± 0.07 22.11 ± 0.08 22.15 ± 0.07 C (mg·g-1) 86.76 ± 6.03 98.75 ± 2.47 114.86 ± 6.47 98.85 ± 5.24 99.04 ± 4.31 89.68 ± 2.88 101.40 ± 4.73 113.68 ± 8.00 0.01 0.76 0.02 H (mg·g-1) 24.32 ± 0.32 24.28 ± 0.88 24.52 ± 0.66 23.94 ± 1.30 25.56 ± 0.46 23.60 ± 0.51 24.98 ± 0.44 25.90 ± 0.86 0.50 0.17 0.34 N (mg·g-1) 7.52 ± 0.18 7.38 ± 0.16 8.60 ± 0.37 9.60 ± 0.41 7.66 ± 0.36 7.15 ± 0.10 7.96 ± 0.35 8.98 ± 0.31 0.00 0.12 0.52 S (mg·g-1) 2.62 ± 0.15 2.51 ± 0.14 2.55 ± 0.15 2.37 ± 0.09 2.17 ± 0.08 2.09 ± 0.06 2.20 ± 0.07 2.01 ± 0.19 0.35 0.00 0.98 P (mg·g-1) 0.89 ± 0.06 0.94 ± 0.03 0.97 ± 0.02 1.02 ± 0.06 0.91 ± 0.06 0.91 ± 0.04 0.97 ± 0.02 0.92 ± 0.07 0.33 0.48 0.65 Fe (mg·g-1) 58.82 ± 3.31 58.59 ± 1.67 61.63 ± 2.85 58.97 ± 3.49 55.56 ± 3.40 62.35 ± 3.00 61.25 ± 2.44 56.77 ± 0.85 0.27 0.60 0.81 Al (mg·g-1) 54.76 ± 2.62 54.05 ± 1.85 53.40 ± 3.25 54.25 ± 2.23 55.78 ± 0.88 53.54 ± 2.50 53.36 ± 2.18 51.18 ± 1.95 0.70 0.58 0.82 K (mg·g-1) 6.07 ± 0.15 6.87 ± 0.38 6.42 ± 0.36 7.03 ± 0.69 7.15 ± 0.50 6.60 ± 0.34 6.38 ± 0.40 5.99 ± 0.70 0.91 0.84 0.18 Ca (mg·g-1) 5.84 ± 0.62 7.83 ± 0.43 6.87 ± 0.66 6.02 ± 0.67 6.01 ± 0.68 5.28 ± 0.46 6.28 ± 0.20 7.36 ± 0.90 0.59 0.35 0.02 Na (mg·g-1) 2.62 ± 0.05 2.18 ± 0.08 2.19 ± 0.05 2.02 ± 0.09 1.95 ± 0.07 1.89 ± 0.08 1.90 ± 0.03 1.59 ± 0.08 0.00 0.00 0.03 Mn (mg·g-1) 1.52 ± 0.09 1.63 ± 0.01 1.64 ± 0.07 1.68 ± 0.10 1.55 ± 0.12 1.52 ± 0.12 1.61 ± 0.04 1.56 ± 0.10 0.71 0.37 0.78 Mg (mg·g-1) 1.01 ± 0.04 1.56 ± 0.13 1.24 ± 0.08 1.36 ± 0.14 1.24 ± 0.12 1.21 ± 0.08 1.30 ± 0.14 1.39 ± 0.21 0.16 0.92 0.16 Zn (mg·g-1) 0.35 ± 0.03 0.39 ± 0.04 0.43 ± 0.03 0.46 ± 0.03 0.42 ± 0.04 0.42 ± 0.02 0.44 ± 0.03 0.43 ± 0.05 0.34 0.36 0.63 Cu (mg·g-1) 0.108 ± 0.002 0.111 ± 0.004 0.105 ± 0.004 0.105 ± 0.002 0.107 ± 0.003 0.107 ± 0.003 0.106 ± 0.004 0.095 ± 0.004 0.09 0.20 0.50