关键词: 稻&mdash, 麦栽培模式, 周年高产, 温室气体, 农田

Abstract: In order to explore the suitable management approaches for lowcarbon agricultural production in Zhejiang Province， the effects of rice varieties and planting pattern on CH4， N2O and CO2 emission were investigated. It was shown that the cultivation method of wheat and rice significantly influenced greenhouse gas emission during the rice season. Under the management of no tillage， the greenhouse gas emission was the largest， and was significantly higher than the management of rotary tillage. Rice varieties also influenced greenhouse gas emission. The total emissions of CH4， N2O， CO2 and emissions per unit grain yield of hybrid rice varieties were significantly lower than the conventional rice varieties in the tilling stage， jointingbooting stage and filling stage. Besides， soil water potential could impact greenhouse gas emission. Reducing rice irrigation decreased CH4 and CO2 emission in the rice field. But， the excessive lowered irrigation would significantly increase N2O emission yet decrease the grain yield. In conclusion， the greenhouse gas emission in rice field could be significantly reduced by the combined management approaches， including applying hybrid rice variety and rotary tillage， and keeping the soil water potential at -20～-30 kPa.

Key words: ricewheat planting pattern, annual yield; , greenhouse gases, field