摘要
为了系统分析玉米整个生育期不同时期水分亏缺对产量的影响,适时开展灌溉影响评估,基于Jensen模型和水量平衡方程,利用水分试验数据和历史观测资料研究了河套灌区玉米水分敏感指数、玉米需水量和最高产量,建立了需水量和水分敏感指数时间变化方程,包括三项式和Logisitic两种形式,在旬尺度上二者的模拟结果十分接近;通过回代和实例检验,估算产量与实测产量有较好的一致性,回代结果的相关系数在0.92以上,相对误差小于15%的样本占到80%;实例检验的相关系数在0.63~0.69之间,相对误差低于20%的样本占到80%~100%,模拟效果基本符合实际。
In order to systematically analyze the effects of water deficit in different growth stages to the yield of maize in whole growth period,carried out the assessment on timely irrigation. Based on the Jensen model and water balance equation,using the moisture test data and history mearured information,researched the water sensitive index,water requtrements and maximal yield of maize in Hetao ID,established the time change equation of water requirements with the water sensitive index,inclued two forms as Three Parameters Formular and Logistic Equation,on 10 days scale,the simulated results by both of them were very close. Through the back and instance test,there was a good consistence between estimated yield and measured yield,the correlation coefficient of return result was above 0. 92,the samples with relative error less than 15% were accounted for 80%. The correlation coefficients tested by the instances were between 0. 63 to 0. 69,the samples with relative error less than 20% were accounted for 80% to 100%,the simulated results were basically conformed to the reality.
出处
《干旱地区农业研究》
CSCD
北大核心
2016年第3期84-89,共6页
Agricultural Research in the Arid Areas
基金
国家公益性行业(气象)科研专项(GYHY201206021)
关键词
水分敏感指数
JENSEN模型
春玉米
需水量
水分生产函数
评估
water sensitive indexes
Jensen model
spring maize
water requirements
water production function
assessment
