摘要
湿润地区中稻旱作灌溉模式以田间持水率为田间水分上限,以田间持水率的60%为田间水分下限,建立中稻旱作灌溉制度模型,并以Matlab为平台开发出了中稻旱作灌溉制度计算程序。根据高邮地区的气象、降水等资料,模拟计算了高邮地区1991-2010年中稻旱作灌溉模式下的灌溉制度,得到了在中稻旱作灌溉模式下,年平均全生育期灌水量为2 875.50m3/hm2,其中泡田灌水定额为1 455.00m3/hm2,不计泡田年平均灌水次数为3.15次;年平均全生育期排水量为453.00m3/hm2,排水次数为0.95次;年平均深层渗漏量为1204.80m3/hm2。模拟计算结果表明,旱作灌溉模式灌溉和排水量比常规淹灌大幅度减少,有利于减少稻田肥料的流失,减少面源污染。
Based on the domestic and international research of rainfed irrigation on rice, rainfed irrigation methods are presented. Upper limit is the maximum field water holding rate and the lower limit is 60%of the maximum field water holding. According to the established irrigation program model for rice rainfed irrigation, a visual calculation procedure of rice rainfed irrigation system is developed by using Matlab as a platform. Using the collected dates from 1991 to 2010, rice rainfed irrigation programs of Gaoyou region are calculated. Under the rice rainfed irrigation system, the average annual amount of the whole growth period irrigation is 2 875.50 ma/hm2. The average irrigation times are 3. 15 times. An annual average of the whole growth period drainage is 453. 00 ma/hm2. The average irrigation times are 0. 95 times. Deep percolation capacity of the average annual amount of deep percolation is 1 204. 80 ma/hm2. The calculation of the irrigation program can meet the requirements of the non-fully irrigated rice.
出处
《节水灌溉》
北大核心
2013年第5期67-70,73,共5页
Water Saving Irrigation
关键词
中稻
旱作灌溉
土壤含水量
rice rainfed irrigationsoil moisture content
