目(mu)前(qian),拱(gong)棚(peng)內(nei)一(yi)些(xie)生(sheng)長(chang)期(qi)短(duan)的(de)秋(qiu)茬(cha)蔬(shu)菜(cai)已(yi)經(jing)采(cai)收(shou)結(jie)束(shu),多(duo)數(shu)菜(cai)農(nong)在(zai)此(ci)後(hou)會(hui)加(jia)種(zhong)一(yi)茬(cha)菠(bo)菜(cai)。但(dan)土(tu)地(di)常(chang)年(nian)連(lian)茬(cha)種(zhong)植(zhi),得(de)不(bu)到(dao)休(xiu)養(yang),危(wei)害(hai)是(shi)多(duo)方(fang)麵(mian)的(de)。
首shou先xian,土tu地di不bu歇xie茬cha,地di力li會hui受shou到dao很hen大da損sun害hai。常chang年nian連lian茬cha種zhong植zhi,土tu壤rang養yang分fen損sun失shi大da,而er很hen多duo菜cai農nong在zai施shi肥fei上shang存cun在zai諸zhu多duo不bu合he理li之zhi處chu,如ru忽hu視shi中zhong微wei量liang元yuan素su施shi用yong,偏pian重zhong施shi用yong某mou一yi種zhong大da量liang元yuan素su等deng,容rong易yi造zao成cheng土tu壤rang養yang分fen嚴yan重zhong失shi調tiao,影ying響xiang蔬shu菜cai的de生sheng長chang發fa育yu。
其qi次ci,土tu地di連lian茬cha種zhong植zhi會hui使shi土tu壤rang中zhong病bing原yuan物wu不bu斷duan積ji累lei,放fang線xian菌jun等deng有you益yi微wei生sheng物wu逐zhu漸jian減jian少shao,病bing蟲chong害hai增zeng多duo。拱gong棚peng秋qiu茬cha蔬shu菜cai采cai收shou結jie束shu加jia種zhong一yi茬cha菠bo菜cai,棚peng上shang不bu撤che膜mo,棚peng內nei溫wen度du一yi直zhi較jiao高gao,根gen結jie線xian蟲chong等deng病bing原yuan物wu沒mei有you經jing過guo冬dong季ji低di溫wen,存cun活huo量liang大da,加jia重zhong了le拱gong棚peng病bing蟲chong害hai的de發fa生sheng。
那麼,拱棚秋茬蔬菜結束後如何管理好呢?一是秋茬蔬菜采收結束後盡早施肥、深(shen)翻(fan)土(tu)地(di)。肥(fei)料(liao)施(shi)入(ru)土(tu)壤(rang)後(hou),需(xu)要(yao)經(jing)過(guo)一(yi)段(duan)時(shi)間(jian)才(cai)能(neng)轉(zhuan)化(hua)為(wei)可(ke)以(yi)直(zhi)接(jie)被(bei)作(zuo)物(wu)吸(xi)收(shou)的(de)養(yang)分(fen),同(tong)時(shi)也(ye)消(xiao)除(chu)了(le)肥(fei)料(liao)的(de)副(fu)作(zuo)用(yong),避(bi)免(mian)下(xia)茬(cha)蔬(shu)菜(cai)出(chu)現(xian)燒(shao)根(gen)、氣(qi)害(hai)等(deng)現(xian)象(xiang)。深(shen)翻(fan)地(di),土(tu)壤(rang)通(tong)透(tou)性(xing)改(gai)善(shan),肥(fei)料(liao)分(fen)布(bu)更(geng)加(jia)均(jun)勻(yun),有(you)利(li)於(yu)根(gen)係(xi)擴(kuo)展(zhan),為(wei)下(xia)茬(cha)蔬(shu)菜(cai)生(sheng)長(chang)打(da)下(xia)良(liang)好(hao)基(ji)礎(chu)。二(er)是(shi)早(zao)撤(che)膜(mo)。拱(gong)棚(peng)撤(che)膜(mo)晚(wan),使(shi)得(de)棚(peng)內(nei)溫(wen)度(du)較(jiao)高(gao),各(ge)類(lei)病(bing)原(yuan)物(wu)越(yue)冬(dong)的(de)數(shu)量(liang)更(geng)多(duo),增(zeng)加(jia)了(le)下(xia)茬(cha)蔬(shu)菜(cai)染(ran)病(bing)的(de)可(ke)能(neng)。及(ji)早(zao)撤(che)去(qu)棚(peng)膜(mo),低(di)溫(wen)等(deng)惡(e)劣(lie)環(huan)境(jing)可(ke)使(shi)各(ge)類(lei)病(bing)原(yuan)物(wu)失(shi)去(qu)活(huo)力(li)。病(bing)原(yuan)物(wu)少(shao)了(le),病(bing)害(hai)也(ye)就(jiu)不(bu)容(rong)易(yi)發(fa)生(sheng)了(le)。
近幾年冬季菠菜價格低迷,收益很低。在越冬茬菠菜效益很低的情況下,種植菠菜還不如歇茬養地,這樣春茬蔬菜長勢好、病害少、產量高,完全可以補上越冬茬菠菜的收益。
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