Feasibility Analysis on Heat Resources of Silage Grain Double Crop Corn Planting Model in the Lower Reaches of the Yellow River
In order to understand the heat resources in the lower reaches of the Yellow River and design a new double cropping corn planting model of silage grain.Based on the daily average temperature data of Yucheng com-prehensive experimental station of Chinese Academy of Sciences located in the irrigation area of the lower Yellow River from 1961 to 2020.This paper systematically analyzes the historical trend change characteristics of the num-ber of days in the possible growth period,the initial date sequence,the ending date sequence,the active accumulat-ed temperature,and the effective accumulated temperature of corn,as well as the combination mode of different ma-turity types of silage grain corn,and compare the new dual season corn planting mode of silage grain corn with the traditional dual season corn planting mode.The results showed that the interannual increasing trend of accumulated temperature and days of possible growth period of corn in Yucheng area was significant in recent 60 years.Accord-ing to the available heat resources and the maturity type of corn varieties,the suitable planting modes of double crop-ping corn in Yucheng area are early silage early maturing grain corn,early silage medium maturing grain corn and medium silage early maturing grain corn.
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