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3 不同年限免耕秸秆覆盖还田下各粒级土壤团聚体的有机碳贡献率

Table 3 Contribution rate of organic carbon in soil aggregates of different particle sizes under no-tillage cover measures %

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 16.88±1.99b 11.16±0.45a 11.92±1.08a 15.52±0.89a 14.70±0.30b 29.03±1.84a T1 18.24±1.58ab 10.22±1.68a 9.98±1.59a 16.29±1.56a 17.92±0.95a 27.46±1.85ab T2 21.85±0.68a 10.37±0.93a 9.80±1.39a 16.11±0.42a 17.55±0.81a 23.68±0.77b T3 22.25±0.69a 10.94±0.57a 9.94±0.72a 15.92±0.33a 17.81±0.80a 22.81±0.92b 10~20 CK 13.60±0.86c 9.17±1.29a 9.46±1.04a 13.60±1.41a 14.48±1.13a 38.32±2.74a T1 17.12±1.35bc 9.13±0.63a 10.09±0.73a 14.95±0.76a 15.14±0.26a 34.22±2.35ab T2 18.54±0.57ab 9.67±0.77a 9.97±0.33a 15.13±0.81a 16.23±1.03a 30.61±1.78bc T3 21.67±1.65a 10.56±1.43a 10.07±0.75a 15.87±1.30a 15.34±0.88a 26.58±1.39c 20~30 CK 14.08±2.02c 8.45±0.23b 8.94±0.81a 14.60±1.04a 15.74±0.44a 37.89±2.60a T1 16.69±1.49bc 8.90±0.64b 9.24±0.70a 15.96±0.45a 15.98±0.47a 33.39±2.25ab T2 19.03±0.55ab 8.73±0.11b 8.87±0.75a 16.33±0.62a 17.26±1.77a 28.82±0.30bc T3 22.98±0.79a 10.57±0.61a 10.32±0.71a 17.39±1.22a 16.41±1.14a 25.97±1.61c