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

张学林,周亚男,李晓立,侯小畔,安婷婷,王群

Effects of Nitrogen Fertilizer on Crop Residue Decomposition and Nutrient Release Under Lab Incubation and Field Conditions

ZHANG XueLin,ZHOU YaNan,LI XiaoLi,HOU XiaoPan,AN TingTing,WANG Qun

表4 大田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

Table 4 Comparison of wheat and maize residue decay constant and their nutrient release among treatments under field conditions

处理Treatment 分解常数(k) Decay constant (%) 有机碳释放量 C release (g C ·kg-1) 全氮释放量 N release (g N·kg-1) 全磷释放量 P release (g P· kg-1) 0 cm soil layer 20 cm soil layer 0 cm soil layer 20 cm soil layer 0 cm soil layer 20 cm soil layer 0 cm soil layer 20 cm soil layer 小麦 Wheat CK 1.9±0.08a 4.6±0.2a 173.9±11.2b 351.2±5.2a 1.9±0.4a 3.7±0.4a 3.4±0.2a 3.8±0.3a N180 1.8±0.09a 4.7±0.2a 166.2±4.7b 356.1±9.4a 2.2±0.02a 4.2±0.4a 3.5±0.3a 3.8±0.3a N360 1.7±0.07a 4.9±0.1b 136.1±1.5a 365.8±6.0a 1.7±0.2a 4.2±0.3a 3.4±0.2a 3.9±0.3a D 3246.1*** 3547.2*** 211.5*** 9.3*** F 1.9 4.7* 2.5 0.07 D×F 8.6** 22.4*** 1.5 0.03 玉米 Maize CK 0.7±0.04a 1.6±0.1b 198.9±14.3a 376.93±11.6b 4.5±0.5a 7.2±0.5b 1.8±0.2a 2.6±0.1b N180 0.8±0.06a 1.50.03a 210.6±10.5a 366.14±9.5b 5.2±0.3a 5.1±0.1a 1.9±0.2a 2.3±0.1a N360 0.7±0.07a 1.43±0.03a 226.7±22.2a 341.78±2.6a 5.1±0.5a 5.7±0.6a 2.3±0.10b 2.2±0.2a D 772.5*** 582.2*** 25.89*** 23.4*** F 3.9* 0.2 3.86* 2.2 D×F 5.9* 8.8** 17.28*** 12.6***