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4 不同深松频次处理土壤有机碳层化率

Table 4 SOC stratification ratio under different frequency of subsoiling treatments

项目 Item 处理 Treatment 土层深度 Depth 0-10/10-20 cm 10-20/20-30 cm 20-30/30-40 cm 总有机碳 TOC NNS 1.18b 1.16ab 1.68a NS 1.26ab 1.25a 1.33b S 1.35a 1.01b 1.33b 活性有机碳 EOC NNS 2.12a 0.77b 0.98b NS 1.62b 1.00a 0.78b S 1.58b 1.00a 1.37a