甘肃景泰灌区玉米收籽与收刈青贮临界适期的研究  

Optimal Timing of Corn Harvest for SilageandGrain Uses inJingtai Irrigated Area of Gansu Province

作　　者：武得礼[1] 葛文华[1] 何世炜[1] 

机构地区：[1]甘肃省草原生态研究所

出　　处：《草业学报》1999年第2期65-70,共6页Acta Prataculturae Sinica

基　　金：甘肃省科委"八五"攻关项目

摘　　要：研究了甘肃景泰灌区玉米灌浆期间籽粒增重和含水量的变化以及不同营养器官不同部位含水量的变化规律。结果表明，籽粒增重过程符合Ｌｏｇｉｓｔｉｃ曲线，籽粒含水量变化符合二次多项式；植株含水量变化随器官和部位的不同而异，其平均含水量变化也呈二次多项式。根据籽粒增重曲线方程、灌浆速度方程、植株含水量变化方程及其玉米秸秆青贮所需的适宜含水量进行综合分析，得出该地区玉米收籽、青贮临界收刈适期为吐丝后３７～４８ｄ。The changes in the moisture content of seeds and vegetative organs of corn crop were studied during the milk stage of the plant. It was found that the changes in the weight of seeds were consistent with a Logistic growth curve, and both the moisture content in seeds and the mean values of moisture in various vegetative organs could be described by a quadratic polynomial equation. Based on the curve and the equations derived, the optimal time for harvesting was determined as 3748 days after the showing of style, when the seeds are suitable for grain use, while the quality of stalk is still good enough for making silage.

关 键 词：玉米 籽粒产量 植株含水量 青贮饲料 

分 类 号：S513.091[农业科学—作物学] S816