一、播種時間萵筍比較耐寒,在冬季一般采用陽畦育苗,要選擇地勢高燥、背風向陽、采光充足的地塊。播種期一般在12月中下旬到1月上旬。
二、苗床準備、播種播種前7~10tian,jiangsuliaobomokoudaoyumiaochuangshang,yejianyaojiagaicaoshan,jinliangditigaomiaochuangdediwen。miaochuangfeiyifushudeyoujifeihesuxiaodanfeiweizhu,beihaochuangtuhou,shirushiliangturangshachongmiejunji,yuchuangtuhunhebanyun,qianfan,papingqimian。jiaoxiaoshui,daishuishenxiahou,bazhongzijunyunsabozaiqimianshang,ranhoufugai0.5厘米的拌藥的細土,完後立即密閉陽畦,夜間加蓋草苫。
三、miaochuangguanliyoumiaochutuqian,caoshanyingwanjiezaogai,butongfeng,yiliyuchumiao。dangyoumiaochutuhoukeyishidangtongfeng,dalianggeqiyan,fangzhiwenduguogaozaochengyoumiaotuchang。zheshi,caoshanyaozaojiewangai,jinliangyanchangcaiguangshijian。dangmiaozichangdao2~3片(pian)真(zhen)葉(ye)時(shi),要(yao)進(jin)行(xing)分(fen)苗(miao)。分(fen)苗(miao)土(tu)用(yong)田(tian)園(yuan)土(tu)加(jia)腐(fu)熟(shu)的(de)有(you)機(ji)肥(fei)和(he)複(fu)合(he)肥(fei)拌(ban)成(cheng)營(ying)養(yang)土(tu),裝(zhuang)入(ru)營(ying)養(yang)缽(bo)內(nei),選(xuan)擇(ze)健(jian)壯(zhuang)的(de)苗(miao)子(zi)移(yi)栽(zai)到(dao)營(ying)養(yang)缽(bo)內(nei),擺(bai)齊(qi)後(hou)澆(jiao)水(shui)、封膜,不要通風,過5~7天後再適當通風。結合澆水打藥2~3次以防止霜黴病和菌核病等常見病害。
四、定植前煉苗當苗子長到5~6片葉子時,選擇粗壯、葉大、節間短的壯苗為生產用苗,及時淘汰高腳苗、弱小苗和病苗。定植前10天(tian)左(zuo)右(you),逐(zhu)漸(jian)加(jia)大(da)苗(miao)床(chuang)的(de)通(tong)風(feng)量(liang),白(bai)天(tian)不(bu)蓋(gai)膜(mo),夜(ye)間(jian)蓋(gai)上(shang),當(dang)遇(yu)到(dao)大(da)風(feng)降(jiang)溫(wen)天(tian)氣(qi)時(shi)要(yao)加(jia)蓋(gai)草(cao)苫(shan),防(fang)止(zhi)遭(zao)受(shou)凍(dong)害(hai)。通(tong)過(guo)低(di)溫(wen)煉(lian)苗(miao),增(zeng)強(qiang)苗(miao)子(zi)抗(kang)寒(han)和(he)適(shi)應(ying)外(wai)界(jie)環(huan)境(jing)的(de)能(neng)力(li),以(yi)提(ti)高(gao)苗(miao)子(zi)的(de)成(cheng)活(huo)率(lv)。在(zai)3月中下旬選擇晴天、無風的天氣覆蓋地膜定植。
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