傳統的蔬菜育苗,一般是將苗床整好後播種蓋土,隨後插好竹弓、覆(fu)蓋(gai)拱(gong)膜(mo)。有(you)的(de)還(hai)在(zai)播(bo)種(zhong)蓋(gai)土(tu)後(hou)先(xian)平(ping)鋪(pu)一(yi)層(ceng)地(di)膜(mo),再(zai)蓋(gai)拱(gong)膜(mo),待(dai)蔬(shu)菜(cai)出(chu)苗(miao)時(shi)將(jiang)平(ping)鋪(pu)的(de)地(di)膜(mo)抽(chou)出(chu),隻(zhi)蓋(gai)一(yi)層(ceng)拱(gong)膜(mo)。筆(bi)者(zhe)在(zai)實(shi)際(ji)工(gong)作(zuo)中(zhong)將(jiang)該(gai)技(ji)術(shu)改(gai)進(jin)為(wei)先(xian)鋪(pu)地(di)膜(mo),再(zai)打(da)孔(kong)播(bo)種(zhong)蓋(gai)籽(zi),然(ran)後(hou)覆(fu)蓋(gai)拱(gong)膜(mo),蔬(shu)菜(cai)出(chu)苗(miao)時(shi)不(bu)揭(jie)地(di)膜(mo),收(shou)到(dao)了(le)良(liang)好(hao)的(de)效(xiao)果(guo)。
具體方法為:先(xian)按(an)照(zhao)常(chang)規(gui)整(zheng)好(hao)苗(miao)床(chuang),澆(jiao)足(zu)底(di)墒(shang),然(ran)後(hou)緊(jin)貼(tie)床(chuang)麵(mian)覆(fu)蓋(gai)一(yi)層(ceng)地(di)膜(mo),注(zhu)意(yi)膜(mo)麵(mian)應(ying)盡(jin)量(liang)繃(beng)緊(jin)鋪(pu)平(ping),四(si)周(zhou)用(yong)細(xi)土(tu)壓(ya)實(shi),然(ran)後(hou)根(gen)據(ju)不(bu)同(tong)蔬(shu)菜(cai)種(zhong)類(lei),在(zai)膜(mo)麵(mian)上(shang)按(an)照(zhao)相(xiang)應(ying)的(de)株(zhu)行(xing)距(ju)打(da)孔(kong)播(bo)種(zhong)。為(wei)提(ti)高(gao)打(da)孔(kong)速(su)度(du)與(yu)質(zhi)量(liang),可(ke)在(zai)一(yi)木(mu)板(ban)上(shang)按(an)照(zhao)預(yu)定(ding)株(zhu)行(xing)距(ju)釘(ding)上(shang)小(xiao)木(mu)樁(zhuang),做(zuo)一(yi)個(ge)簡(jian)單(dan)的(de)“定苗器”,用(yong)定(ding)苗(miao)器(qi)打(da)孔(kong),既(ji)能(neng)保(bao)證(zheng)株(zhu)行(xing)距(ju)均(jun)勻(yun),又(you)能(neng)保(bao)證(zheng)打(da)孔(kong)深(shen)度(du)和(he)孔(kong)口(kou)直(zhi)徑(jing)基(ji)本(ben)一(yi)致(zhi)。種(zhong)子(zi)播(bo)後(hou)在(zai)膜(mo)麵(mian)撒(sa)少(shao)量(liang)細(xi)土(tu),用(yong)軟(ruan)掃(sao)帚(zhou)把(ba)土(tu)掃(sao)入(ru)孔(kong)中(zhong)將(jiang)種(zhong)子(zi)蓋(gai)嚴(yan),隨(sui)後(hou)插(cha)好(hao)竹(zhu)弓(gong)、覆蓋拱膜。蔬菜出苗時任其從孔中長出,直到起苗都不將地膜揭起。
此法育苗的好處十分明顯:一是苗床土壤濕度均勻,蔬菜苗生長基本一致;二是能夠提高苗床土壤平均溫度,保持苗床土壤疏鬆,對幼苗根係生長特別有利,同時也增強了蔬菜苗期的抗寒能力;三san是shi地di膜mo將jiang苗miao地di上shang與yu地di下xia部bu分fen環huan境jing隔ge斷duan,能neng夠gou在zai保bao持chi苗miao床chuang土tu壤rang墒shang情qing適shi宜yi的de同tong時shi,降jiang低di苗miao床chuang空kong氣qi濕shi度du,從cong而er有you效xiao地di減jian輕qing了le蔬shu菜cai苗miao期qi病bing害hai,使shi培pei育yu出chu的de蔬shu菜cai苗miao明ming顯xian更geng加jia健jian壯zhuang,病bing害hai很hen少shao。
若ruo用yong塑su料liao穴xue盤pan或huo營ying養yang缽bo育yu苗miao,也ye可ke采cai用yong該gai技ji術shu。在zai塑su料liao穴xue盤pan或huo營ying養yang缽bo擺bai好hao後hou鋪pu營ying養yang土tu,用yong木mu板ban刮gua平ping,澆jiao足zu底di墒shang再zai覆fu蓋gai地di膜mo,按an照zhao塑su料liao穴xue盤pan或huo營ying養yang缽bo擺bai好hao後hou的de株zhu行xing距ju打da孔kong播bo種zhong,保bao證zheng每mei穴xue、每缽都能播到,然後撒土蓋種,覆蓋拱膜。該技術也適宜在玉米等其他農作物育苗上使用。
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