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5 大田条件下小麦和玉米秸秆分解期间干重剩余率（L）变化

Table 5 Dynamics of biomass remaining rate during wheat and maize residues decomposition periods under field conditions

Tr 小麦Wheat 玉米Maize 30 d 60 d 90 d 120 d 60 d 120 d 150 d 180 d 210 d 地表 处理Surface CK 67.3±2.0a 63.8±0. 8a 60.4±0.4a 56.2±1.1a 87.2±1.6a 81.5±2.3a 76.6±1.9a 71.0±1.6a 65.3±1.1a N180 67. 6±1.6a 63.4±0.4a 61.4±2.7a 57.5±0.3ab 86.3±1.7a 81.0±2.1a 75.2±1.7ab 70.6±2.4a 64.9±1.6a N360 64.9±1.0a 63.4±1.9a 60.8±1.3a 58.8±1.0b 88.4±1.4a 81.5±1.3a 77.7±0.7a 69.7±1.1a 64.9±2.1a 20 cm 处理 20 cm Depth CK 50.6±0.5c 38.0±1.2b 28.0±0.3b 24.5±0. 9b 63.7±1.6a 55.5±2.2a 48.5±2.1a 40.1±1.2a 39.2±1.5a N180 49.0±0.6b 36.4±0.9ab 27.0±0.6b 23.9±1.0b 64.9±1.6a 60.4±1.3b 50.4±2.0ab 44.0±1.1b 42.3±0.7b N360 47.7±0.5a 34.9±0.7a 24.5±0.9a 21.9±0.4a 69.1±1.8b 56.9±0.9ab 51.5±1.6b 46.0±1.4b 44.1±1.5b t-test -27.2*** -42.5*** -38.2*** -38.0*** -32.1*** -28.2*** -51.2*** 27. 9*** -33.0***