淠史杭灌区中稻作物系数试验研究(二)  

Study on the Crop Coefficient of Middle- season Rice in Pishihang Irrigation District( Ⅱ)

作　　者：陈卫东[1] 

机构地区：[1]安徽省淠史杭灌区管理总局,安徽六安237016

出　　处：《安徽农业科学》2015年第9期55-56,共2页Journal of Anhui Agricultural Sciences

摘　　要：[目的]研究淠史杭灌区中稻作物系数的估算方法。[方法]利用Penman-Monteith公式计算参考蒸散量,通过观测获得中稻实际蒸散蒸腾量,求出2014年中稻实际作物系数Kc,并利用李艳婷等的研究结果建立的移栽后天数模型和积温模型2种方法估算2014年中稻作物系数Kc1和Kc2,分别比较Kc1、Kc2与Kc之间的RMSE,找出适合淠史杭灌区作物系数的估算方法。[结果]Kc1、Kc2与Kc的RMSE分别为0.106和0.197,移栽后天数法估算的作物系数Kc1与实测作物系数Kc较为接近,即淠史杭灌区的中稻作物系数选用移栽后天数法来估算更为准确。[结论]该研究为淠史杭灌区中稻作物系数的研究提供了一定的科学依据。[Objective]The research aimed to study the estimation method of middle- season rice crop coefficient in Pishihang Irrigation District. [Method]Calculation of reference evapotranspiration by using Penman- Monteith formula,get the rice actual evaporation transpiration through observation,find out the actual 2014 rice crop coefficient Kc,using the research results in Li Yan- ting et al established days after transplantation model and the accumulated temperature model estimated 2014 rice crop coefficients of Kc1 and Kc2,the EMSE between Kc1,Kc2 and Kcwere compared,the estimation method of middle- season rice crop coefficient in Pishihang Irrigation District was found. [Result]Respectively,the EMSE between Kc1,Kc2 and Kcwere 0. 106 and 0. 197. Days after transplanting method to estimate the crop coefficient Kc1 was closer to the measured crop coefficient Kc,that middle rice crop coefficient chosen days after transplanting method to estimate more accurate.[Conclusion]The study provides a scientific method for the middle- rice crop coefficient research of Pishihang Irrigation District.

关 键 词：中稻 作物系数Kc 移栽天数法估算作物系数Kc1 积温法估算作物系数Kc2 

分 类 号：S511[农业科学—作物学]