免耕秸秆覆盖对半干旱区土壤团聚体稳定性和玉米产量的影响

马小明, 齐翔鲲, 谭雪, 史孟豫, 王玉凤, 付健, 杨克军

Effects of No-tillage with Straw Mulching on Soil Aggregate Stability and Maize Yield in Semi-Arid Region

Ma Xiaoming, Qi Xiangkun, Tan Xue, Shi Mengyu, Wang Yufeng, Fu Jian, Yang Kejun

表2 不同年限免耕秸秆覆盖还田下各粒径团聚体中有机碳含量的变化

Table 2 Changes of organic carbon content in aggregates with different particle sizes under no-tillage with straw mulching and returning over different years g/kg

土层深度 Soil depth (cm) 处理 Treatment 粒径Particle size (mm) >5.00 (2.00,5.00] (1.00,2.00] (0.50,1.00] (0.25,0.50] ≤0.25 0~10 CK 15.38±0.51b 14.27±0.32c 14.10±0.39b 11.86±0.50b 9.89±0.26c 9.57±0.43c T1 16.59±0.48b 15.98±0.69b 15.07±0.26b 15.30±1.07a 14.54±0.31b 13.14±0.50b T2 18.27±0.61a 16.80±0.31b 15.23±0.56b 15.21±0.31a 14.63±0.24b 13.64±0.52b T3 19.16±0.34a 18.59±0.55a 16.77±0.29a 16.34±0.53a 16.00±0.60a 15.37±0.48a 10~20 CK 12.63±0.46b 12.30±0.26b 10.84±0.50c 9.86±0.36c 9.75±0.32b 9.67±0.31b T1 13.14±0.31b 12.48±0.35b 12.47±0.12b 11.57±0.27b 10.94±0.18a 10.55±0.61ab T2 13.23±0.46b 13.22±0.35b 12.90±0.38b 11.84±0.46b 11.68±0.26a 11.26±0.52ab T3 16.05±0.48a 15.79±0.57a 14.28±0.43a 13.59±0.50a 11.74±0.52a 11.54±0.43a 20~30 CK 10.71±0.51c 10.67±0.47b 10.36±0.45b 9.40±0.27b 9.38±0.31a 9.03±0.35b T1 11.18±0.35bc 11.21±0.51b 11.10±0.70b 10.38±0.41b 9.51±0.43a 9.78±0.16ab T2 12.11±0.21b 11.39±0.47b 11.15±0.71b 11.21±0.92b 10.63±0.54a 10.04±0.23ab T3 15.02±0.42a 14.46±0.39a 13.90±0.35ab 13.16±0.47a 10.99±0.68a 10.51±0.48a