不同灌溉条件下吉林省玉米绿水足迹研究

Research on Green Water Footprint for Maize Production in Jilin Province under Different Irrigation Scenarios

为了探讨不同灌溉情景下丰水年、平水年、枯水年玉米的生产需水及水分来源的变化规律,对吉林省玉米生产绿水足迹进行细分。通过研究,不同灌溉条件下不同降水年型吉林省玉米生产需水中均以绿水消耗为主,占77%以上。在玉米绿水足迹中,以有效降水量为主,枯水年土壤水消耗量最大。吉林省单位质量玉米绿水足迹地域分异明显,西部地区以土壤水消耗为主,中部地区以有效降水量为主,而东部地区全部为有效降水量,单位质量玉米土壤水足迹均表现出从西向东递减的趋势。

In order to estimate the water requirement and resources of maize production under the different irrigation scenarios in wet,normal and dry years,this paper divided the green water footprint for maize production in Jilin Province. The results indicated that： 1The major portion of water footprint for maize production was green water under the different irrigation scenarios in different precipitation years,which accounted for more than 77%. 2The effective precipitation comprised the largest proportion,the soil water consumption was the biggest in dry years. 3The spatial difference of per unit mass of green water was obvious,which was soil water as the main in the west region,effective precipitation as the main in the middle region and all of effective precipitation in the east region. 4The per unit mass of soil water showed a decreasing trend from west to east.