长江中游地区双季稻安全生产日期的变化
艾治勇1, 郭夏宇1, 刘文祥1, 马国辉1, 青先国2,*

Changes of Safe Production Dates of Double-season Rice in the Middle Reaches of the Yangtze River
AI Zhi-Yong1, GUO Xia-Yu1, LIU Wen-Xiang1, MA Guo-Hui1, QING Xian-Guo2,*
图7 主要双季稻区杂交晚籼稻安全齐穗温度指标出现在8月份的年份频次
Fig. 7 Number of years existing the index temperature 23℃ in August for safe fill heading of late-season hybrid indica rice in main double-season rice planting area