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(
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Effects of Various Paddy-Upland Crop Rotations and Nitrogen Fertilizer Levels on CH4 Emission in the Middle and Lower Reaches of the Yangtze River
LIU ShaoWen,YIN Min,CHU Guang,XU ChunMei,WANG DanYing,ZHANG XiuFu,CHEN Song()
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图4. 2016（A、C和E）和2017（B、D和F）年度不同轮作模式及氮肥梯度下水稻不同生育阶段CH4累积排放量
Ⅰ、Ⅱ和Ⅲ分别代表分蘖期、孕穗期和灌浆期。同一生育阶段不同小写字母表示不同轮作模式间差异显著（P<0.05）
Fig. 4. CH4 accumulation emissions at different rice growth periods under different rotation systems and N fertilizer rates in 2016 (A, C and E) and 2017 (B, D and F)
Ⅰ, Ⅱ and Ⅲ represent tillering stage, booting stage and filling stage; respectively. Different small letters in the same growth period indicated significant difference among different rotation systems at P<0.05
