連作栽培條件下，溫（濕）度du適shi宜yi，作zuo物wu根gen係xi分fen泌mi物wu和he植zhi株zhu殘can茬cha腐fu解jie物wu給gei病bing原yuan菌jun提ti供gong了le豐feng富fu的de營ying養yang和he寄ji主zhu。設she施shi栽zai培pei條tiao件jian導dao致zhi病bing蟲chong害hai多duo發fa，大da量liang施shi用yong農nong藥yao對dui土tu壤rang中zhong的de微wei生sheng物wu種zhong群qun乃nai至zhi土tu壤rang中zhong的de固gu氮dan菌jun、根gen瘤liu菌jun和he有you機ji質zhi分fen解jie菌jun等deng有you益yi微wei生sheng物wu產chan生sheng不bu利li的de影ying響xiang。化hua肥fei的de過guo多duo施shi用yong導dao致zhi土tu壤rang中zhong病bing原yuan拮jie抗kang菌jun的de減jian少shao，助zhu長chang了le土tu壤rang病bing原yuan菌jun的de繁fan殖zhi，加jia重zhong了le土tu傳chuan病bing害hai的de發fa生sheng。

克服蔬菜連作障礙的方法

（一）輪作 zaitongyikuaitiandishang，youshunxudizaijijiejianhuonianjianlunhuanzhongzhibutongdezuowuhuofuzhongzuhe。zhaozunliangaosujizhe，zaijiejueshucaizuowulianzuozhangaifangmian，lunzuoshimuqianyingyongbijiaoguangfanqiexiaoguomingxiandeyizhongfangfa。zuowudexuduobinghairucandougenfubing、甜菜褐斑病
、番fan茄qie青qing枯ku病bing等deng都dou通tong過guo土tu壤rang侵qin染ran。如ru將jiang感gan病bing的de寄ji主zhu作zuo物wu與yu非fei寄ji主zhu作zuo物wu實shi行xing輪lun作zuo
，便bian可ke消xiao滅mie或huo減jian少shao這zhe種zhong病bing菌jun在zai土tu壤rang中zhong的de數shu量liang，減jian輕qing病bing害hai。輪lun作zuo除chu可ke以yi有you效xiao防fang治zhi土tu傳chuan病bing害hai外wai

，還hai可ke以yi解jie決jue根gen係xi分fen泌mi物wu及ji自zi毒du問wen題ti以yi及ji作zuo物wu殘can體ti所suo致zhi的de非fei土tu傳chuan病bing害hai問wen題ti。（二）間作套種 趙zhao尊zun練lian告gao訴su記ji者zhe除chu了le輪lun作zuo外wai，間jian作zuo套tao種zhong也ye是shi克ke服fu蔬shu菜cai連lian作zuo障zhang礙ai的de有you效xiao方fang法fa。他ta指zhi出chu把ba一yi茬cha有you兩liang種zhong或huo兩liang種zhong以yi上shang生sheng育yu季ji節jie相xiang近jin的de作zuo物wu，在zai同tong一yi地di塊kuai上shang成cheng行xing或huo成cheng帶dai間jian隔ge種zhong植zhi，不bu僅jin可ke以yi提ti高gao土tu地di利li用yong率lv和he單dan位wei麵mian積ji的de產chan出chu
，而er且qie可ke以yi部bu分fen解jie決jue連lian作zuo障zhang礙ai問wen題ti。如ru在zai蔬shu菜cai生sheng產chan中zhong
，把ba蔥cong蒜suan類lei與yu其qi它ta蔬shu菜cai作zuo物wu間jian作zuo套tao種zhong，由you於yu蔥cong蒜suan類lei根gen係xi分fen泌mi物wu可ke以yi有you效xiao地di殺sha滅mie某mou些xie有you害hai病bing菌jun
，因yin此ci能neng減jian少shao相xiang關guan病bing害hai的de發fa生sheng。