夏季,隨著氣溫、光照等環境因素的變化,絲瓜植株莖葉生長快,根係老化快,若管理不當,極易造成植株早衰。這時建議菜農做好采取以下幾項措施:
巧施肥水 絲瓜喜潮濕,不耐幹旱,適宜土壤含水量為70-85%,yingjishijiaoshui,fangzhisiguazhizhuyinganhanzaoshuai。cainongyingzaitianqishihedetiaojianxia,zaizhaixinhoujiaoyishui,zhanguahouliangtianjiaoyishui,zhaiguaqianliangtianjiaoyishui,zhejiukeyicujinguatiaohezhizhushengchang,yufangzaoshuai。jieguoqi,yingyangshengchangheshengzhishengchangdouhenwangsheng,duiyangfenxuqiulianghenda,suoyicainongyaozhuyijishizhuifei,baozhengyingyanggongyingchongzu。
合理留瓜 越yue夏xia絲si瓜gua種zhong植zhi時shi,由you於yu植zhi株zhu生sheng長chang快kuai,菜cai農nong一yi般ban都dou是shi三san四si片pian葉ye留liu一yi個ge瓜gua,但dan菜cai農nong一yi定ding要yao注zhu意yi植zhi株zhu長chang勢shi,根gen據ju長chang勢shi決jue定ding留liu瓜gua。在zai生sheng長chang旺wang盛sheng的de棵ke子zi上shang,可ke以yi三san四si片pian葉ye留liu一yi個ge瓜gua;在生長較弱的棵子上,則應該適當減少留瓜,改為五六片葉留一個瓜,否則會導致植株負擔過重,根係、莖、葉生長發育不良,最終引起植株早衰。建議菜農根據植株生長狀況隨時調整,合理留瓜。
調整棚室溫度 絲瓜植株生長適宜溫度白天25-32℃,夜間15-20℃。lixiahoushineiwenduxunsushenggao,suoyiyaojishicaiqucuoshijiangdipengwen。shouxian,yaojiaqiangtongfeng,zhongwukechangkaipengmen,jiadatongfengkou。qici,shezhizheyangwang,zheyangwangzhuyaoshitongguozhedangbufenyangguang,jianshaorelianglaijiangdipengwen。zaoshang、下午光照弱,為提高光合效率,遮陽網應在上午11點以後到下午3點之前使用。再次,合理澆水降低地溫。水分蒸發會吸收大量的熱,合理澆水也是降低棚內溫度的重要措施,菜農要合理利用。
預防病蟲害 總zong的de來lai說shuo,絲si瓜gua抗kang病bing性xing很hen強qiang,病bing害hai較jiao少shao,但dan夏xia季ji棚peng室shi高gao溫wen高gao濕shi的de環huan境jing,易yi導dao致zhi細xi菌jun性xing病bing害hai和he病bing毒du病bing的de高gao發fa,因yin而er在zai管guan理li上shang還hai應ying加jia強qiang預yu防fang措cuo施shi。細xi菌jun性xing病bing害hai多duo在zai落luo蔓man後hou發fa生sheng,因yin而er在zai落luo蔓man前qian應ying噴pen施shi農nong用yong鏈lian黴mei素su3000倍加以預防。對於病毒病的預防,重點在於傳毒害蟲的防治:設置防蟲網,預防棚室內外傳毒害蟲傳播;懸掛黃色粘蟲板,粘殺棚內害蟲,並觀察蟲情;及時用藥,如啶蟲脒、吡蟲啉等。同時,還要結合噴施施寧南黴素、菇類蛋白等,提高植株抗病能力,預防病毒病。
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