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长江中游双季稻产区,早稻播种育秧时节常有冷空气入侵,造成阴雨低温天气,烂种、烂秧现象屡有发生。江汉平原的烂秧时段,主要出现在3月下旬至4月中旬,其频率达88%,而且烂秧年份几乎三年一遇。对于烂秧天气的抗御,人们虽已充分注意,但对于烂秧年份(俗称冷年)和有利于育秧的年份(俗称暖年)与早稻产量的关系以及对应未来的农业气候特点,却尚未加以研究。如何趋利避害地因天施策,夺取早稻高产?多年来笔者在这方面作了一些探讨。
Double-cropping paddy areas in the middle reaches of the Yangtze River, cold rice planting seedling planting season often have cold air intrusion, resulting in rainy weather, rotten seedlings, rotten seedling phenomenon often occur. Rotten transplanting in the Jianghan Plain occurred mainly between late March and mid-April, with a frequency of 88%. In addition, rotten transplanting took place in almost every three years. Although sufficient attention has been paid to the weather resistance of rotten seedlings, the relationship between the rotten seedling years (commonly known as cold years) and the year favorable for seedling (commonly known as warm years) and the yield of early rice and the corresponding agro-climatic characteristics have not yet been the study. How to advantage and avoid disadvantages due to policy days to win early rice high yield? Over the years I made some discussion in this regard.