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6 作物地上部还田量与SBD、SOC、SCS、MWD和TCPC之间的相关系数
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Table 6 Correlation coefficients of SIR with SBD, SOC, SCS, MWD, and TCPC
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土层深度 Soil depth | 指标 Indictor | 秸秆还田量 SIR | 土壤容重 SBD | 平均重量直径 MWD | 土壤有机碳含量 SOC | 土壤有机碳储量 SCS | 0-10 cm | SBD | -0.75* | | | | | | MWD | 0.81** | -0.63* | | | | | SOC | 0.79* | -0.56** | 0.59* | | | | SCS | 0.41 | -0.05 | 0.26 | 0.80* | | | TCPC | 0.75** | -0.93** | 0.66* | 0.61* | 0.05 | 10-20 cm | SBD | -0.70** | | | | | | MWD | 0.72** | -0.49 | | | | | SOC | 0.81** | -0.56* | 0.72** | | | | SCS | 0.58* | -0.12 | 0.89** | 0.89* | | | TCPC | 0.82** | -0.26 | 0.69** | 0.80** | 0.80* | 20-30 cm | SBD | -0.70* | | | | | | MWD | 0.83** | -0.53 | | | | | SOC | 0.57* | -0.45** | 0.71* | | | | SCS | 0.41* | -0.19 | 0.62* | 0.96** | | | TCPC | 0.85** | -0.58* | 0.87** | 0.79** | 0.69 | 30-40 cm | SBD | -0.56 | | | | | | MWD | -0.77** | 0.35 | | | | | SOC | -0.02 | 0.19 | 0.28 | | | | SCS | 0.12 | 0.37 | 0.33 | 0.98** | | | TCPC | 0.59* | -0.13 | -0.25 | 0.23 | 0.20 |
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