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温室蔬菜生产使蔬菜生产的效率得到了很大的提高。但是,温室蔬菜的生产由于受空间的影响,其生产过程中的各种危害也比自然生产增加了很多,因此,做好各种危害的防治十分重要。一、肥害肥害是因肥料施用不当对蔬菜秧苗造成的危害。肥害初期表现从下部叶片开始,中午萎蔫早晚可恢复,严重时早晚也难恢复,叶片深绿色,不长新叶,根系不发育。其发生原因是配制营养土时掺人过量化肥或未腐熟的畜禽粪,造成土壤水分渗透压力过大,根系吸水困难而“烧苗”。防治方法应以预防为主。在配制营养土时要使用搓碎过筛、充分腐熟的有机肥,并严格按技术要求配比,追肥一定要结合浇水进行。一旦发生肥害,要立即浇大水,可减轻或缓解症状。
Greenhouse vegetable production has greatly increased the efficiency of vegetable production. However, the production of greenhouse vegetables due to the impact of space, the production of various hazards than natural production has increased a lot, so do a variety of hazards prevention and control is very important. First, fat fertilizer damage due to improper application of fertilizer on the vegetable seedlings caused harm. Early performance of fertilizer from the beginning of the lower leaves, midday wilting sooner or later resume, sooner or later it is difficult to recover in severe morning and evening, dark green leaves, not long new leaves, root development. The reason is that the preparation of nutrition soil mixed with excessive fertilizer or not maturity of livestock and poultry manure, resulting in excessive soil water infiltration pressure, the root of water-absorbing difficulties and “seedling ”. Prevention should be based on prevention. In the preparation of nutrition soil to use graze screening, full maturity of organic fertilizer, and in strict accordance with the technical requirements ratio, top dressing must be combined with watering. In the event of fertilizer damage, immediately pour water, can reduce or relieve symptoms.