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(一) 我省水稻的冷害损失比较普遍,除重灾的八月低温年份,如一九七四年,稻产损失以亿斤计,常年的冷害损失,由于地势、气候和前作的影响,一般都不免有以下三种损害:(一)稻田缺水和前作迟熟,水稻移栽过迟,因而错过了当地高温时段,使水稻分蘖、生长不旺,抽穗延至不安全的低温时期,以致引起严重空秕。(二)倒春寒频繁,水稻播种育秧发生烂种、死苗,或则秧苗生长过于缓慢,不能育成及时壮秧;(我省部分双季稻区育成冬秧,就是为了解决这个问题)甚至严重缺秧,不能保证满栽满插,引起单产、总产下降。(三)水稻低温敏感时期(花粉母细胞减数分裂期),遭受低温为害,使水稻花粉发育不良,丧失授粉能力,不能正常结实。早稻于五月下旬孕
(1) The loss of rice chilling injury in our province is relatively common. In addition to heavy losses in August of low temperature, such as in 1974, the loss of paddy rice was estimated to be 100 million kilograms, and the perennial loss of chilling damage due to the influence of topography, climate and pre- Generally can not help but have the following three kinds of damage: (a) paddy fields lack of water and before the late, rice transplanted too late, thus missing the local high temperature period, so that rice tillering, growth is not flourishing, heading to unsafe low temperature period, resulting Cause serious empty stomach. (B) In late spring cold frequent, seed sowing rice seedlings rotten, dead seedlings, or the growth of seedlings is too slow, can not be bred in a timely manner Zhuang seedlings; (some double cropping rice in our province bred winter seedlings, is to solve this problem) or even a serious shortage Seedlings, can not guarantee full planting full insert, causing yield, total output decline. (C) rice during low temperature sensitivity (meiosis of pollen mother cells), suffering from low temperature damage to rice pollen dysplasia, loss of pollination, can not be normal and strong. Early rice is pregnant in late May