中国生态农业学报2012，Vol.20Issue(6)：723-727,5.DOI:10.3724/SP.J.1011.2012.00723
浮萍对福州平原稻田CH4和N2O排放的影响分析
Effect of azolla on CH4 and N2O emissions in Fuzhou Plain paddy fields
摘要
Abstract
Azolla is a common aquatic fern that floats in paddy fields. It grows rapidly and has the ability to fix N2 into the soil. However, the effects of azolla growth on emissions of greenhouse gases are yet uncertain. This study measured CH4and N2O emissions in two paddy fields in Fuzhou Plain, one with floating azolla and the other with non-floating azolla. The purpose of the study was to draw on the benefits of scientific evaluation of emissions of greenhouse gases in China's paddy fields. The results showed that CR, emissions were in the range of 0.19-26.50 mg·m-2·h-1 and 1.02-28.02 mg·m-2·h-1 and with average values of 9.28 mg·m-2·h-1 and 11.66 mg·m-2h-1 in the azolla treatment and non-azolla treatment, respectively. CH4 emission in azolla plots was significantly lower than that in non-azolla plots at P < 0.01. Peak CH, emission in azolla plots was early by about one week compared with non-azolla plots, after which period it decreased rapidly. N2O emissions were in the range of -50.11~201.82 μg·m-2·h-1 and -28.93-54.42 μg·m-2·h-1 with average values of 40.29 μg·m-2·h-1 and 11.93 μg·m-2·h-1 in azolla plots and non-azolla plots, respectively. N2O emission in azolla plots was significantly higher than that in non-azolla plots at P < 0.05. N2O emission increased rapidly after paddy fields drainage and both plots followed similar trends. Different driving factors of CH4 and N2O emissions were noted in azolla and non-azolla plots. A comprehensive consideration of CH4 and N2O greenhouse gases showed that CH4 was the key contributor to greenhouse effects in paddy fields. Azolla reduced integrated greenhouse effects by 17.3% in the humid sub-tropical Fuzhou Plain region.关键词
浮萍/稻田/甲烷/氧化亚氮/综合温室效应Key words
Azolla, Paddy field, CH4, N2O, Greenhouse effect分类
生物科学引用本文复制引用
马永跃,仝川,王维奇,曾从盛..浮萍对福州平原稻田CH4和N2O排放的影响分析[J].中国生态农业学报,2012,20(6):723-727,5.基金项目
国家自然科学基金项目(31000209)、福建省公益类研究所专项(2011R1037-5)和福建省教育厅项目(JB11030)资助 （31000209）
