为了解黄河下游地区的热量资源并设计青贮-子粒新型双季玉米种植模式,基于位于黄河下游灌区的中科院禹城综合试验站1961-2020年逐日平均气温资料,对玉米可能生长期日数、初始日序、终止日序、活动积温、有效积温的历史趋势变化特征以及不同熟期青贮-子粒玉米的组合模式进行系统分析和预测,比较青贮-子粒新型双季玉米种植模式与传统双季玉米种植模式。结果表明,禹城地区玉米积温与可能生长期日数在近60年内的年际增加趋势显著。根据可利用热量资源与玉米品种熟期,禹城地区双季玉米适宜的种植模式为早熟青贮-早熟子粒玉米、早熟青贮-中熟子粒玉米和中熟青贮-早熟子粒玉米,夏播子粒玉米的可调整弹性播期有显著增加趋势。

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 comprehensive 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 number of days in the possible growth period, the initial date sequence, the ending date sequence, the active accumulated temperature, and the effective accumulated temperature of corn, as well as the combination mode of different maturity 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. According to the available heat resources and the maturity type of corn varieties, the suitable planting modes of double cropping corn in Yucheng area are early silage early maturing grain corn, early silage medium maturing grain corn and medium silage early maturing grain corn.

S513.01

国家自然科学基金面上项目(31870421)