采用地膜覆蓋的形式種植早春萵筍,具有投資小、省工、省力、價格平穩、畝純效益較高的特點。這個茬口安排在3月份定植,由於早春氣候適宜萵筍的生長,在6月份就能收獲,畝產量在萬斤以上。下麵,介紹一下利用陽畦培育萵筍苗的技術要點,供大家參考。
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。dangmiaozichangdao2~3pianzhenyeshi,yaojinxingfenmiao。fenmiaotuyongtianyuantujiafushudeyoujifeihefuhefeibanchengyingyangtu,zhuangruyingyangbonei,xuanzejianzhuangdemiaoziyizaidaoyingyangbonei,baiqihoujiaoshui、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zai3月中下旬選擇晴天、無風的天氣覆蓋地膜定植。
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