地膜覆盖与施肥对秸秆碳氮在土壤中固存的影响
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王淑颖,李小红,程娜,付时丰,李双异,孙良杰,安婷婷,汪景宽
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Effects of Plastic Film Mulching and Fertilization on the Sequestration of Carbon and Nitrogen from Straw in Soil
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WANG ShuYing,LI XiaoHong,CHENG Na,FU ShiFeng,LI ShuangYi,SUN LiangJie,AN TingTing,WANG JingKuan
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表1 不同处理土壤（0—20 cm）基本性质（2019年）
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Table 1 Basic soil properties at 0-20 cm depth in various treatments (in 2019)
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栽培模式
Cultivation mode | 施肥处理
Fertilization treatment | 土壤总有机碳
Total soil organic carbon (g·kg-1) | δ13C值
δ13C value (‰) | 全氮
Total nitrogen (g· kg-1) | δ15N值
δ15N value (‰) | 碳氮比
C/N ratio | 不覆膜
No mulching | CK | 8.78±0.05 e | -18.04±0.02 a | 1.05±0.02 cd | 5.68±0.03 c | 8.37±0.11 c | | N4 | 8.52±0.01 f | -18.10±0.03 a | 1.06±0.02 cd | 4.04±0.02 e | 8.00±0.17 d | | M2N2 | 13.11±0.02 a | -19.65±0.02 e | 1.49±0.04 a | 6.94±0.04 b | 8.80±0.20 b | 覆膜
Mulching | CK | 9.16±0.03 d | -18.26±0.04 b | 1.03±0.02 d | 5.62±0.01 c | 8.88±0.15 b | | N4 | 10.57±0.03 c | -19.20±0.03 d | 1.11±0.02 c | 5.13±0.02 d | 9.54±0.10 a | | M2N2 | 12.75±0.04 b | -19.12±0.04 c | 1.42±0.02 b | 14.26±0.05 a | 8.96±0.10 b |
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