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低温天气 蔬菜注意早晚保温

2011-1-10 10:53| 发布者: jyqmaya| 查看: 322459| 评论: 0

摘要: 近一段时间我市气温明显偏低。如何让蔬菜不被冻坏?市蔬菜研究所种育专家陈祖华支招:对设施栽培的蔬菜要加强管理,注意早晚保温,特别是对越冬育苗的茄果类蔬菜要及时盖膜保温,夜间加盖双层膜(双层膜中间必须有空隙 ...
 近一段时间我市气温明显偏低。如何让蔬菜不被冻坏?市蔬菜研究所种育专家陈祖华支招:对设施栽培的蔬菜要加强管理,注意早晚保温,特别是对越冬育苗的茄果类蔬菜要及时盖膜保温,夜间加盖双层膜(双层膜中间必须有空隙,可以在中间夹层盖2至3层遮阳网)以保温防霜冻。
  陈祖华说,目前由于冰冻天气持续时间不长,对半耐寒蔬菜未超过临界低温极限,对于存园蔬菜生产影响有限,但如果气温走低到零下四五度,且持续时间较长,就会明显影响蔬菜生产和上市产量。他建议,对设施栽培的蔬菜,晚上加盖薄膜或保暖物防霜冻,中午气温回升时要放风降湿,防止因湿度过大而使蔬菜致病;对露天种植的易受冻害的蔬菜要加强保温,对部分冻害较轻的露天种植蔬菜种类的田块及时清沟沥水,防止水渍沤根,在天气晴好时,薄施一次液态氮肥或腐熟人粪尿、沼液,促其生长。
  陈祖华还介绍说,对于因冰冻低温幼苗全部损失的苗床要及时采取补播措施,补播时可催芽或直接播干籽都可以。
 
Near effluxion of time my municipality air temperature is obviously low.How let vegetable anti drive frost deterioration?The municipality vegetable kind in the research bureau teaches specialist, Chen Zu Hua, to pay enlist:The vegetable that educates to the facility wants to strengthen a superintendence, note sooner or later heat preservation, especially vs more the winter teaches the Jia fruits vegetable of seedling and shrouds a membrane heat preservation just in time, the nighttime seals a lays membranes(dipeptide lay membrane the medium have to have air space, can betwixt the mezzanine floor shroud the 2-3 F awning net) to defend a frost by heat preservation.
Chen Zu Hua says that currently in order to keeping the weather duration anti captain in deep freeze, half and half the resistant to cold vegetable didn't exceed critical low temperature limit, for place a park vegetable capacity impact finite, but if the air temperature lowers below zero 45 kilowatt hourses, and the duration is longer, will obviously affect vegetable capacity and listing output.He suggests that the vegetable that educates to the facility, seals soapfilm or keeps warm in the evening the res defend a frost, at midday air temperature gravelled want to put wind rose to cut wet, anticipate making a vegetable because of humidity oversize to disease;The vegetable that plants easily to be subjected to frost damage to the open air wants to strengthen a heat preservation and plant the farmland cake of vegetable category to the parts of frost damages lighter open air pure trench Li just in time aqua, anticipate a water stain Ou indogen, fine in the weather like, thin liquidness nitrogen fertilizer of Shi Yi Ci or Fu acquaintance's excrement and urine, Zhao liquid, urge its growth.
Chen Zu Hua also recommends to say, the in re wants to assume revamp to sow performance because of keeping the seedling bed of low temperature young sprout actual total loss in deep freeze just in time, the revamp could accelerate bud or directly sow shank seeds all while sowing can.

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