氮肥对室内和大田条件下作物秸秆分解和养分释放的影响
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张学林,周亚男,李晓立,侯小畔,安婷婷,王群
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Effects of Nitrogen Fertilizer on Crop Residue Decomposition and Nutrient Release Under Lab Incubation and Field Conditions
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ZHANG XueLin,ZHOU YaNan,LI XiaoLi,HOU XiaoPan,AN TingTing,WANG Qun
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表2 室内培养条件下不同处理之间小麦和玉米秸秆分解常数（k）、养分释放量（Dt）比较
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Table 2 Comparison of wheat and maize residue decay constant and their nutrient releases among the treatments under lab incubation conditions
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作物
Crop | 处理
Treatments | 分解常数Decay constant (k) (%) | 碳释放量 C release (g C·kg-1) | 氮释放量N release (g N·kg-1 ) | 磷释放量P release (g P·kg-1) | | 砂姜黑土ST | 潮土FT | 砂姜黑土ST | 潮土FT | 砂姜黑土ST | 潮土FT | 砂姜黑土ST | 潮土FT | 小麦
Wheat | SCK | 3.0±0.2a | 3.6±0.1a | 352.3±2. 5b | 384.1±0.9b | 3.6±0.04c | 4.3±0.06a | 3.6±0.06a | 3.6±0.12a | | SN180 | 3.1±0.1a | 4.1±0.1b | 332.5±3.6a | 379. 6±2.8a | 3.5±0.04b | 4.5±0.07b | 3.6±0.03a | 3.6±0.04a | | SN360 | 3.2±0.1a | 4.3±0.1c | 333.6±6.5a | 393.2±3.7c | 3.4±0.07a | 4.6±0.11b | 3.6±0.03a | 3. 7±0.07a | | t -test | -12.2*** | -12.3*** | -13.9*** | -2.2* | 玉米
Maize | SCK | 5.8±0.04c | 5.7±0.11b | 570.0±1.1c | 563.4±2.2a | 11.4±0.06b | 11.3±0.5a | 3.3±0.07a | 3.3±0.11a | | SN180 | 5.5±0.07b | 5.5±0.04a | 566.9±0.7b | 564.4±5.01a | 11.1±0.04a | 11.1±0.1a | 3.3±0.04a | 3.3±0.03a | | SN360 | 5.2±0.06a | 5. 5±0.03a | 563.8±2.5a | 564.6±9.6a | 11±0.02a | 11.1±0.2a | 3.3±0.08a | 3.2±0.05a | | t -test | NS | NS | NS | NS | | Cr | 5289.8*** | 27956.9*** | 24276.1*** | 281.9*** | | S | 310.3*** | 318.7*** | 115.6*** | 1.6 | | F | 0.1 | 9.9*** | 3.6* | 0.1 | | Cr×S | 249.7*** | 406.5*** | 104.6*** | 4.0 | | Cr×F | 86.4*** | 7.7** | 6.5** | 0.9 | | S×F | 18.9*** | 17.5*** | 4.4* | 0.42 | | Cr×S×F | 2.0 | 5.9** | 1.9 | 1.26 |
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