摘要
利用自动称重式蒸渗仪进行了寒地黑土区玉米喷灌灌溉制度的研究。结果表明,玉米喷灌区蒸腾蒸发量随灌水量的增大而增大,水分生产率降低,适度减少灌水定额,不影响玉米产量,且减少蒸腾蒸发量,提高水分生产率,达到节水的目的;在玉米苗期适度减少灌水量可使玉米得到耐旱锻炼,对后期水分吸收产生补偿效应,提高了玉米抗逆性;在玉米需水关键期增加灌水次数,可增加玉米产量。
Irrigation schedule of corn in cold area was studied using automatic weighing lysimeter. The evapotraspiration increased with the irrigation rate increasing, and the water productivity decreased, lower irrigation rate has not effect the yield, on the contrary, it could reduce the evapotraspiration, give a higher water productivity and save the water. Meanwhile, lower irrigation rate in the seedling stage could be a hardening for drought resistance for the maize seedling, it could produce a compensation effect in the later period, heighten the stress resistance of the corn, adding irrigation frequency in the water need critical period would increase the yield.
出处
《黑龙江大学工程学报》
2013年第3期14-18,共5页
Journal of Engineering of Heilongjiang University
基金
水利部科技推广计划项目(TG1201)
关键词
玉米
喷灌
蒸腾蒸发
产量
corn
sprinkling irrigation
evapotraspiration
yield
