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一年只有365天,而三熟制作物的全生育期共需420～430天,这就带来了很大的季节矛盾。由于这个矛盾的存在,往往造成后季稻产量不稳定,影响全年粮食高产稳产。三熟制,既要满足作物的生育期,又要不误农时,争取时间抢季节,做到一早带三早,夺取全年高产。因此,用化学药剂处理,使麦子提早成熟,提早收割,早稻就可以早栽、早熟,后季稻就能按期插秧,避过九月中旬的低温,安全抽穗,稳产高产。为此,我们于75年进行了“乙基黄原酸钠”催熟试验。结果如下:
There are only 365 days a year, while the whole growth period of the three cooked crops takes 420 to 430 days, which brings a lot of seasonal conflicts. Due to the existence of this contradiction, the output of the latter season rice tends to be unstable and affects the high and stable grain output throughout the year. Three cooked system, it is necessary to meet the growing season of crops, but also not wrong farming, for the time to seize the season, so early in the morning with three to win the full-year high yield. Therefore, with chemical treatment, wheat early maturity, early harvest, early rice can be planted early, early maturity, seasonal rice can be planted on time, avoiding the cold in mid-September, safe heading, stable and high yield. To this end, we carried out the “ethyl xanthate sodium” ripening test in 75 years. The result is as follows: