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3 不同深松频次处理各粒径土壤团聚体固碳能力

Table 3 Carbon preservation capacity of soil aggregates under different frequency of subsoiling treatments

土层深度 Depth (cm) 处理 Treatment 总固碳能力 TOPC (g·kg-1) 不同粒级团聚体固碳能力Aggregate-associated CPC (g·kg-1) >2 mm 2-1 mm 1-0.5mm 0.5-0.25mm 0.25-0.053mm <0.053mm 0-10 NNS 8.60a 0.47a 0.47b 1.09a 1.33a 2.27a 2.98a NS 7.42ab 0.39a 0.36b 0.79b 0.89a 2.05a 2.94a S 6.42b 0.37a 0.85a 1.09a 0.65b 1.82b 1.63b 10-20 NNS 7.92a 0.09c 0.35b 1.73a 0.97a 1.50a 3.27a NS 8.14a 0.63a 0.59a 1.17a 1.14a 1.47a 3.14a S 6.66b 0.26b 0.41b 0.86b 0.77a 1.12b 3.24a 20-30 NNS 4.58b 0.15b 0.27a 0.41b 0.72a 1.35b 1.68b NS 6.77a 0.10b 0.24a 0.36b 0.59b 3.47a 2.01b S 6.93a 0.21a 0.33a 0.50a 0.85a 1.38b 3.65a 30-40 NNS 6.64a 0.15a 0.21a 0.43a 0.64a 1.70a 3.50a NS 6.17a 0.01b 0.15a 0.31a 0.44b 0.96b 4.30a S 4.70b 0.03b 0.09b 0.31a 0.36b 1.19b 2.72b AVG NNS 6.93a 0.21a 0.33b 0.91a 0.92a 1.70a 2.86b NS 7.13a 0.28a 0.30b 0.66b 0.76b 1.99a 3.10a S 6.18b 0.22a 0.42a 0.69b 0.66c 1.38b 2.81b