长江中下游稻区不同水旱轮作模式和氮肥水平 对稻田CH4排放的影响

刘少文,殷敏,褚光,徐春梅,王丹英,章秀福,陈松

Effects of Various Paddy-Upland Crop Rotations and Nitrogen Fertilizer Levels on CH4 Emission in the Middle and Lower Reaches of the Yangtze River

ShaoWen LIU,Min YIN,Guang CHU,ChunMei XU,DanYing WANG,XiuFu ZHANG,Song CHEN

表1 不同轮作及氮肥水平下土壤基本性质（两年平均）

Table 1 Basic properties of soil under different rotation systems and different N rates（the two years’ average）

轮作 Rotation 肥料 Fertilizer TN (g·kg-1) AN (g·kg-1) SOM (g·kg-1) pH RF N0 2.52g 0.14fc 31.2e 6.18ab N1 3.27cd 0.17e 39. 7bcd 5.87bc N2 2.91ef 0.18cd 39.8cd 5.76c RC-G N0 2.77f 0.19cd 37.8d 6.27a N1 2.87ef 0.19cd 38.1cd 6.12abc N2 3.48abc 0.19bc 41.9b 5.84bc RW N0 3.10de 0.17de 39.7bcd 5.89bc N1 3.29bcd 0.20bc 40.8bc 5.80c N2 3.24cd 0.19cd 38.3bcd 5.78c RP N0 3.40abc 0.21b 45.0a 5.83bc N1 3.52ab 0.25a 46.1a 5.86bc N2 3.58a 0.19bc 46.4a 5.84bc