干旱地区农业研究2011，Vol.29Issue(6)：25-30,6.
南方季节性干旱区再生稻降水资源高效利用研究
Improving rainfall use efficiency of ratoon rice in seasonal drought areas of South China
摘要
Abstract
This study is to investigate the strategies for high rainfall use efficiency of ratoon rice in seasonal drought areas of southern China. Crop evapotranspiration( ETc) was calculated by means of the Penman - Monteith equation using meteorological and crop data from 69 counties of five provinces ( Sichuan, Hubei, Jiangxi, Chongqing and Guangxi) . According to the spatial and temporal distribution and its congruence between rainfall and ETC, strategies for rainfall management of different areas are outlined as follows: (1) In most counties of Sichuan and Chongqing, amount of rainfall match to that of ETC during rice growing season. Drying paddy field in sunshine at early stage and alternate drying and wetting at middle and late stage are suggested as the rainfall management practices for these areas; (2) Most counties, except three in Hubei, are not suitable for ratoon rice production; And (3) Guangxi and Jiangxi are similar in rainfall temporal distribution, with the majority of rainfall occurring in the early rice growing season. Therefore, drying paddy field in sunshine at early stage is strongly recommended, while alternate drying and wetting at middle and late stage are not suitable for these areas. At the end of this paper, the importance of high rainfall use efficiency for reducing methane emission in ratoon rice field is highlighted according to our experiences of field experiments.关键词
再生稻/季节性干旱区/降水资源利用Key words
ratoon rice/ seasonal drought area/ rainfall use efficiency分类
农业科技引用本文复制引用
刘正辉,毕俊国,江德权,林赵淼,李侠,丁艳锋..南方季节性干旱区再生稻降水资源高效利用研究[J].干旱地区农业研究,2011,29(6):25-30,6.基金项目
公益性行业(农业)科研专项经费(200903002) （农业）
教育部新世纪优秀人才支持计划(NCET-10-0472) （NCET-10-0472）
教育部博士点新教师基金(200803071017) （200803071017）
