摘要
基于辽宁省阜新蒙古族自治县气象站近30年来的气象资料，应用CROPWAT模型对该地区不同降水年型（湿润年、平水年、枯水年和极枯水年）春玉米生长需水规律及灌溉制度进行了研究。结果表明：玉米生长季需水服从生育初期少、中期多、后期偏多的变化规律，需水量为479．5-593．7mm，阶段需水量在抽穗至灌浆期达到峰值；湿润年玉米生长需水与有效降雨的耦合度最大、平水年次之、枯水年较小和极枯水年最小，对应所需补灌量分别为127．6、175．8、296．5和411．6mm，灌溉频率依次为3、4、6和8次。研究结果为该区农业水资源的合理利用及春玉米灌溉管理提供了理论依据，可以有效地指导当地农户针对不同降水年份实施适当的灌溉。
Based on meteorological data from Fuxin Mongolian Autonomous County weather sta- tion in the last 30 years, crop water requirements and irrigation scheduling of spring maize were determined with CROPWAT model in different hydrological years （wet, normal, dry and ex- tremely dry）. The results indicated that crop water requirement of spring maize peaked at mid- season stage, slightly decreased at last stage, and reached the lowest value at initial stage. Crop water requirement during the whole growing cycle was found to be 479.5-593.7 mm and reached its peak from heading stage to milk ripening stage. The coupling degree between spring maize wa- ter requirement and effective precipitation in the wet year was the highest, followed by the normal year, and the lowest in the extremely dry year. The net irrigation quotas were 127.6, 175.8, 296.5 and 411.6 mm in wet, normal, dry and extremely dry years, and the corresponding irriga- tion frequencies 3, 4, 6 and 8, respectively. The obtained results provided a theoretical basis for proper utilizing agricultural water resources and irrigation scheduling of spring maize, and could be used as efficient guidelines for local farmers to apply suitable irrigation scheduling.
出处
《生态学杂志》
CAS
CSCD
北大核心
2016年第12期3428-3434,共7页
Chinese Journal of Ecology
基金
国家"十二五"科技支撑计划项目(2013BAD05B07和2013BAD07B03)
国家公益性行业(农业)专项(201303125)资助
关键词
春玉米
生长需水量
降水年型
耦合度
灌溉制度
spring maize
crop water requirement
hydrological years
coupling degree
irriga-tion scheduling
作者简介
郭金路，男，1990年生，硕士研究生，主要从事农业水土资源利用与管理方面的研究。E-mail：18801031772@163．com
通讯作者E-mail：ygh006@163．com
