需要正確施肥,第一,3年以上的大棚,雞、牛糞的施用都應控製在2500千克以內,化學肥料減50%左右。第二,鹽濃度大的地塊,要多施牛糞、腐殖酸肥和EM菌肥,以提高土壤碳氮比,鬆土透氣。第三,補充硼、鋅、鎂肥等微量元素,平衡土壤營養,降低投入,爭取持續高產。
誤區二:留liu苗miao越yue多duo,產chan量liang越yue增zeng許xu多duo菜cai農nong在zai疏shu苗miao時shi往wang往wang為wei高gao產chan而er多duo留liu苗miao。其qi實shi,由you於yu秋qiu冬dong季ji節jie氣qi溫wen低di,光guang照zhao弱ruo,光guang合he作zuo用yong差cha,碳tan水shui化hua合he物wu合he成cheng少shao,因yin此ci隻zhi有you合he理li的de密mi度du才cai能neng高gao產chan。越yue冬dong茬cha蔬shu菜cai以yi合he理li稀xi植zhi為wei好hao,為wei了le充chong分fen利li用yong空kong間jian,還hai可ke采cai取qu前qian期qi密mi植zhi,中zhong期qi疏shu株zhu,後hou期qi疏shu枝zhi的de管guan理li辦ban法fa,以yi葉ye枝zhi不bu擁yong擠ji為wei準zhun,提ti高gao總zong產chan量liang和he總zong效xiao益yi。
誤區三:溫度越高,長得越快蔬菜生長過程中對溫度有上限要求,一般為25℃~32℃。溫wen度du過guo高gao,呼hu吸xi作zuo用yong大da,機ji體ti生sheng理li活huo動dong就jiu會hui紊wen亂luan,植zhi株zhu徒tu長chang,產chan量liang反fan而er會hui下xia降jiang。最zui好hao在zai大da棚peng設she置zhi兩liang道dao放fang風feng口kou,及ji時shi降jiang溫wen。按an各ge種zhong蔬shu菜cai生sheng長chang期qi所suo需xu溫wen度du和he各ge個ge器qi官guan生sheng長chang期qi適shi溫wen要yao求qiu管guan理li,防fang止zhi高gao溫wen導dao致zhi長chang蔓man不bu長chang果guo。
誤區四:zhizhuwangsheng,changshilianghaoduoshunonghudourenweizhumanyuewangsheng,zhizhushengchangyuejiankang,qishiyepianshengchangwangsheng,genxiwangwanghenqian,yingyangnanyixishouwanquan,chanliangdi,yingyangshengchangguowangshibihuiyingxiangshengzhishengchang,chanliangfanerhuijiangdi。zuihaozaiyoumiaoqikongshuikongzhucujingenxishengchang。qianqizhutixiaohaoyingyangliangyingzhan60%左右,生殖生長占40%左右,中期各占50%,後期生殖生長占60%,營養生長隻占40%,以提高產量。
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