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白天仍需覆蓋遮陽網,並注意加強通風 立(li)秋(qiu)後(hou),白(bai)天(tian)天(tian)氣(qi)仍(reng)很(hen)炎(yan)熱(re),光(guang)照(zhao)仍(reng)較(jiao)強(qiang)。因(yin)此(ci),晴(qing)天(tian)的(de)中(zhong)午(wu)仍(reng)需(xu)在(zai)棚(peng)頂(ding)覆(fu)蓋(gai)遮(zhe)陽(yang)網(wang),以(yi)防(fang)幼(you)苗(miao)被(bei)強(qiang)光(guang)灼(zhuo)傷(shang)。同(tong)時(shi)注(zhu)意(yi)加(jia)強(qiang)通(tong)風(feng),控(kong)製(zhi)好(hao)棚(peng)內(nei)的(de)溫(wen)度(du),嚴(yan)防(fang)高(gao)溫(wen)危(wei)害(hai),一(yi)般(ban)茄(qie)果(guo)類(lei)蔬(shu)菜(cai)育(yu)苗(miao)期(qi)棚(peng)內(nei)的(de)溫(wen)度(du)白(bai)天(tian)應(ying)控(kong)製(zhi)在(zai)30℃左右,瓜類蔬菜育苗期棚內的溫度白天應控製在32℃,當棚內溫度超過35℃時應加大通風力度。
大棚夜間應注意保溫,避免幼苗受低溫冷害 秋(qiu)季(ji)溫(wen)差(cha)較(jiao)大(da),夜(ye)間(jian)溫(wen)度(du)常(chang)會(hui)降(jiang)低(di)。因(yin)此(ci),正(zheng)處(chu)在(zai)育(yu)苗(miao)期(qi)的(de)蔬(shu)菜(cai)要(yao)注(zhu)意(yi)在(zai)傍(bang)晚(wan)關(guan)嚴(yan)大(da)棚(peng)通(tong)風(feng)口(kou),以(yi)防(fang)幼(you)苗(miao)夜(ye)間(jian)遭(zao)遇(yu)冷(leng)風(feng)侵(qin)襲(xi),生(sheng)長(chang)不(bu)良(liang)。一(yi)般(ban)茄(qie)果(guo)類(lei)蔬(shu)菜(cai)育(yu)苗(miao)期(qi)棚(peng)內(nei)的(de)溫(wen)度(du)夜(ye)間(jian)應(ying)控(kong)製(zhi)在(zai)16℃,瓜類蔬菜育苗期棚內的溫度夜間應控製在12℃~18℃,低於此標準應及時采取保溫措施。
陰雨天注意加強管理 秋(qiu)季(ji)陰(yin)雨(yu)天(tian)較(jiao)多(duo),應(ying)注(zhu)意(yi)采(cai)取(qu)綜(zong)合(he)措(cuo)施(shi),加(jia)強(qiang)管(guan)理(li),促(cu)進(jin)幼(you)苗(miao)正(zheng)常(chang)生(sheng)長(chang)。首(shou)先(xian),在(zai)陰(yin)雨(yu)天(tian)裏(li),對(dui)處(chu)於(yu)育(yu)苗(miao)期(qi)的(de)蔬(shu)菜(cai)應(ying)加(jia)強(qiang)通(tong)風(feng),盡(jin)量(liang)避(bi)免(mian)澆(jiao)水(shui)和(he)噴(pen)藥(yao),必(bi)須(xu)用(yong)藥(yao)時(shi)應(ying)選(xuan)用(yong)粉(fen)塵(chen)劑(ji),以(yi)免(mian)增(zeng)加(jia)棚(peng)內(nei)濕(shi)度(du),誘(you)發(fa)病(bing)害(hai);其次,棚內要保持充足的光照,為防高溫強光而在棚麵噴泥漿的棚,應擦拭幹淨,以免影響蔬菜的光合作用;第三,久陰暴晴後應及時用遮陽網遮陽,以防蔬菜“閃苗”;第四,下雨時應關嚴棚頂的通風口,以防雨水進入,導致蔬菜感染病害。
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