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在冬季及早春的蔬菜栽培中,低温的障碍影响及保温防冻是必须引起重视的问题。如果棚室内长期低温,会对蔬菜生长造成障碍影响,应及时采取措施预防。1.棚室低温对蔬菜的危害主要表现在以下四点:(1)造成花芽分化不良。大多数蔬菜花芽分化的温度,一般为20~30℃,棚内温度如果长期低于或高于这一温度,会造成花芽分化不良,出现大量畸形果、空洞果,或落花落果;而且当低温在一定的极值之下,如低于15℃时辣椒的花器就会发育不良,辣椒正常结(2)
In winter and early spring vegetable cultivation, the influence of low-temperature barriers and insulation freeze-thaw are issues that must be taken seriously. If shed long-term low temperature will cause obstacles to the growth of vegetables, should take timely measures to prevent. 1 greenhouse cold damage to vegetables is mainly manifested in the following four points: (1) cause poor differentiation of flower buds. Most vegetable flower bud differentiation temperature, usually 20 ~ 30 ℃, if the greenhouse temperature is below or above this temperature for a long time, will result in poor flower bud differentiation, a large number of deformed fruit, hollow fruit, or drop flowers; and when the low temperature Under certain extremums, for example, when the temperature is lower than 15 ° C, the flower of the peppers will be stunted and the peppers become normal (2)