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1.连续阴天温度控制比晴天低2—3℃,不可加温过高而造成徒长虚弱,在保证秧苗不受冻害的情况下,要尽量揭开草帘,使秧苗见光。 2.大风天气白天把透明覆盖物固定好,以免被风吹跑,夜间盖严,把草苫子压好,否则,一旦被风刮掉,秧苗极易受冻。中、后期遇南风天气,虽然气温升高,但要避免冷风从通风口直接吹入畦内,损伤秧苗。必要时,可在畦子的里口通风,通风时要由小到大,让秧苗有一个适应过程,大风天不通风。 3.中午前后云多天气中午前后,太阳光照相对较强,畦温变化快,若空中出现云层,要随时关注畦温变化:云遮日,畦温降低,要关好通风口;云过日出,畦温快速升高,应及时打开通风口,防止烤伤秧苗。尤其是在秧苗顶部触及
1. Continuous cloudy day temperature control 2-3 ℃ lower than the sunny, can not be overheated and caused the growth is weak, in ensuring the case of seedlings from frost damage, as far as possible to uncover the straw curtain so that seedlings see the light. Windy daytime transparent coverings fixed, so as not to run away by the wind, nocturnal cover, the grass prickly heat pressure, otherwise, once the wind scraped off, the seedlings vulnerable to cold. In the latter part of the South Southerly weather, although the temperature increased, but to avoid cold air directly into the vent from the vent, damage seedlings. If necessary, can vent in the mouth of the shuttlecock, ventilation from small to large, so that there is a seedling adaptation process, windy days are not ventilated. 3. Around noon before and after cloudless weather Before and after noon, the sun is relatively strong, the temperature changes rapidly, if the clouds appear in the sky, we must pay attention to the temperature changes: cloud cover, lower temperature, to close the vent; Out, 畦 temperature rapid rise, should promptly open the vent, to prevent bake seedlings. Especially at the top of the seedling