深松与免耕频次对黄土旱塬春玉米田土壤团聚体与土壤碳库的影响

张琦,王淑兰,王浩,刘朋召,王旭敏,张元红,李昊昱,王瑞,王小利,李军

Effects of Subsoiling and No-Tillage Frequencies on Soil Aggregates and Carbon Pools in the Loess Plateau

ZHANG Qi,WANG ShuLan,WANG Hao,LIU PengZhao,WANG XuMin,ZHANG YuanHong,LI HaoYu,WANG Rui,WANG XiaoLi,LI Jun

表5 不同深松频次处理土壤碳库组成变化

Table 5 Change of SOC fractions under different frequency of subsoiling treatments.

土层 Depth (cm) 处理 Treatment 活性有机碳/总有机碳 EOC/TOC (%) 非活性有机碳/总有机碳 HOC/TOC (%) 氧化稳定系数 Kos 0-10 NNS 0.33a 0.67b 1.99b NS 0.25b 0.75a 2.96a S 0.26b 0.74a 2.91a 10-20 NNS 0.19a 0.81a 4.38a NS 0.20a 0.80a 4.11a S 0.22a 0.78a 3.57b 20-30 NNS 0.28a 0.72a 2.56b NS 0.23b 0.77a 3.29a S 0.22b 0.78a 3.55a 30-40 NNS 0.48a 0.52c 1.08b NS 0.40a 0.60b 1.53b S 0.21b 0.79a 3.70a AVG NNS 0.32a 0.68b 2.50b NS 0.27b 0.73ab 2.97ab S 0.23b 0.77a 3.43a