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《ACTA PRATACULTURAL SCIENCE》 1999-02
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Optimal Timing of Corn Harvest for SilageandGrain Uses inJingtai Irrigated Area of Gansu Province

Wu DeliGe WenhuaHe Shiwei(Gansu Grassland Ecological Research Institute, Lanzhou 730020)  
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.
【Fund】: 甘肃省科委“八五”攻关项目
【CateGory Index】: S513.09
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