有的菜農認為壟越高越好,個別菜農甚至將壟高設置在40~60厘(li)米(mi)。這(zhe)種(zhong)做(zuo)法(fa)是(shi)錯(cuo)誤(wu)的(de),壟(long)過(guo)高(gao)時(shi),雖(sui)能(neng)顯(xian)著(zhu)提(ti)高(gao)地(di)溫(wen)和(he)土(tu)壤(rang)的(de)透(tou)氣(qi)性(xing),但(dan)澆(jiao)水(shui)卻(que)成(cheng)了(le)問(wen)題(ti)。澆(jiao)水(shui)過(guo)少(shao),則(ze)水(shui)洇(yin)不(bu)到(dao)壟(long)上(shang),不(bu)能(neng)保(bao)證(zheng)蔬(shu)菜(cai)正(zheng)常(chang)生(sheng)長(chang)所(suo)需(xu)要(yao)的(de)水(shui)分(fen);jiaoshuiguoduo,zetianjianjishuishijianchang,rongyizaochengshucaiougenhebingjunchuanbo,zhishishucailangensike。erlongguodishi,jiaoshuishaoduojiuhuimanguolongding,balongdingguanshi,shiqilongzaipeizengqiangturangtouqixingdezuoyongshiquyiyi。kejian,longguogaohuoguodidouduishucaishengchanbuli。yinci,yaoxiangshiqilongzaipeizhenzhengfahuiqiyingyoudexiaoguo,zelonggaoshezhiyaoheli。
那麼,在起壟栽培中壟多高才最合理呢,筆者認為,一般情況下,壟高以25厘米左右較為適宜。若大棚內地麵向南流水不是很順時,可將壟高增至30厘米,以防壟溝內水麵漫過壟頂;若大棚內地麵向南流水很順時,則可將壟高降至20厘米,以防溝內水洇不到壟頂,造成壟麵過於幹旱,影響蔬菜生長。總之,應掌握的標準是澆水時水深應達到壟高度的2/3處,這樣起壟栽培才能發揮出應有的效果。
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