很多種植越夏蔬菜的菜農反映，由於棚內溫度過高（中午時棚內最高氣溫達到40℃左右），導(dao)致(zhi)棚(peng)內(nei)種(zhong)植(zhi)的(de)蔬(shu)菜(cai)生(sheng)長(chang)不(bu)良(liang)，像(xiang)西(xi)紅(hong)柿(shi)葉(ye)片(pian)葉(ye)緣(yuan)出(chu)現(xian)灼(zhuo)燒(shao)狀(zhuang)
，落(luo)花(hua)落(luo)果(guo)現(xian)象(xiang)嚴(yan)重(zhong)

，辣(la)椒(jiao)則(ze)出(chu)現(xian)大(da)量(liang)日(ri)灼(zhuo)果(guo)及(ji)臍(qi)腐(fu)病(bing)果(guo)
，豆(dou)類(lei)蔬(shu)菜(cai)則(ze)表(biao)現(xian)落(luo)花(hua)落(luo)莢(jia)嚴(yan)重(zhong)等(deng)等(deng)，而(er)這(zhe)些(xie)都(dou)是(shi)因(yin)為(wei)棚(peng)內(nei)溫(wen)度(du)過(guo)高(gao)出(chu)現(xian)高(gao)溫(wen)障(zhang)礙(ai)引(yin)起(qi)的(de)。那麼菜農應該如何降低棚內溫度，預防棚內高溫障礙的發生呢
？

shouxian，jiaqiangtongfeng，jiangdipengwen。cainongzaizhongzhiyuexiashucaishi，weilebimianpengneishucaichuxiangaowenzhangai
，yaozhuyijiangdapengdeshangxiafangfengkouquanbudakai，rangpengwaidelengkongqijinrupengneihou，yupengneiderekongqixingchengduiliu，yijiasurekongqidepaichu，congeryouliyupengneiwendudejiangdi。xuyaotixingcainongzhuyideshi，zaifangfengshi，yaozaifangfengkoudexiafangshezhidangfengmo，yifanglengfengzhichuidaoshucaideguomianshang

，daozhiguoshichuxiancunpi、裂口等。

qici，shiyongzheyangwangjiangwen。dangtongguofangfengfangfahaibunengjiangpengneiwendukongzhizaishiyishucaishengchangdeyaoqiufanweizhineishi
，cainongzuihaoshiyongzheyangwangzheyangjiangwen。cainongyingzaishangwupengneiwendujiejinshiyishucaishengchangdezuigaowendushijiangzheyangwangfangxia，zaixiawupengneiwendudiyushiyishucaishengchangdezuigaowendushijiangzheyangwangjuanqijike，danshiyaozhuyizaijiangzheyangwangfangxiashibunengdangzhufangfengkou。zaixuangouzheyangwangshi，cainongkeyixuangouzheguanglvzai60%左右的，因為這種遮陽網即能起到遮光降溫
，預防日灼果的作用，又能讓部分光線照射到大棚內部，有利於蔬菜葉片光合作用的提高。

再zai次ci，中zhong午wu噴pen霧wu降jiang溫wen。在zai夏xia季ji中zhong午wu時shi，因yin為wei棚peng內nei溫wen度du較jiao高gao，葉ye片pian蒸zheng發fa量liang大da，根gen係xi吸xi收shou的de水shui分fen不bu能neng滿man足zu蔬shu菜cai蒸zheng騰teng作zuo用yong的de需xu要yao，而er使shi西xi紅hong柿shi葉ye片pian出chu現xian上shang卷juan現xian象xiang。菜cai農nong可ke以yi在zai棚peng內nei安an裝zhuang微wei噴pen頭tou噴pen霧wu的de方fang式shi來lai降jiang低di棚peng溫wen，這zhe樣yang做zuo還hai能neng起qi到dao增zeng加jia棚peng內nei空kong氣qi濕shi度du，預yu防fang蔬shu菜cai花hua柱zhu柱zhu頭tou幹gan燥zao
，促cu進jin授shou粉fen，預yu防fang蔬shu菜cai落luo花hua落luo果guo的de作zuo用yong。

最後

，菜農還可向棚內蔬菜葉片上噴灑甲殼素、氨基酸、海藻酸等葉麵肥，促進蔬菜健壯生長
，提高其對高溫的抗逆性。