周年秸秆还田对农田土壤固碳及冬小麦-夏玉米产量的影响
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李昊昱,孟兆良,庞党伟,陈金,侯永坤,崔海兴,金敏,王振林,李勇
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Effect of annual straw return model on soil carbon sequestration and crop yields in winter wheat-summer maize rotation farmland
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Hao-Yu LI,Zhao-Liang MENG,Dang-Wei PANG,Jin CHEN,Yong-Kun HOU,Hai-Xing CUI,Min JIN,Zhen-Lin WANG,Yong LI
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表5 不同秸秆还田模式对0~40 cm土层土壤固碳能力的影响
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Table 5 Effect of straw incorporation on carbon preservation capacity of soil aggregates in 0-40 cm layers
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土层深度 Soil depth | 处理 Treatment | 总固碳能力 TCPC (g kg-1) | 不同粒级团聚体固碳能力 Aggregate-associated CPC (g kg-1) | >5 mm | 5-2 mm | 2-1 mm | 1-0.5 mm | 0.5-0.25 mm | <0.25 mm | 0-10 cm | NS | 5.60 b | 0.22 a | 0.95 a | 0.83 a | 1.10 b | 1.12 a | 1.37 a | | SS | 6.07 a | 0.54 a | 1.10 a | 0.98 a | 1.53 a | 0.94 a | 0.98 ab | | WS | 5.79 ab | 0.42 a | 1.13 a | 0.75 a | 1.44 ab | 1.10 a | 0.96 b | | DS | 6.15 a | 0.61 a | 1.13 a | 0.89 a | 1.60 a | 1.07 a | 0.84 b | 10-20 cm | NS | 5.87 c | 0.22 a | 0.95 b | 0.94 a | 1.50 a | 0.98 a | 1.28 a | | SS | 6.17 b | 0.28 a | 1.05 ab | 1.03 a | 1.70 a | 0.98 a | 1.13 ab | | WS | 6.37 ab | 0.51 a | 1.31 ab | 0.47 a | 1.70 a | 0.82 a | 0.57 c | | DS | 6.61 a | 0.59 a | 1.66 a | 1.41 a | 1.63 a | 0.58 a | 0.74 bc | 20-30 cm | NS | 3.51 c | 0.19 a | 0.35 b | 0.43 b | 0.82 b | 0.75 a | 0.97 a | | SS | 3.82 c | 0.19 a | 0.55 ab | 0.76 ab | 0.84 b | 0.67 a | 0.82 a | | WS | 4.21 b | 0.08 a | 0.81 a | 0.54 b | 1.21 a | 0.77 a | 0.80 a | | DS | 4.73 a | 0.14 a | 0.99 a | 1.01 a | 1.30 a | 0.65 a | 0.64 a | 30-40 cm | NS | 2.13 b | — | 0.14 a | 0.23 a | 0.87 a | 0.41 a | 0.48 a | | SS | 2.17 b | — | 0.09 b | 0.22 a | 0.94 a | 0.46 a | 0.47 a | | WS | 2.59 a | — | 0.13 a | 0.40 a | 0.82 a | 0.57 a | 0.68 a | | DS | 2.57 a | — | 0.08 b | 0.33 a | 0.74 a | 0.73 a | 0.69 a |
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