cetupeifangshifeijishushidangjinnongyeshengchanshangtuiguangdeyixiangxinjishu。zhenduibutongzhongleidezuowujibutongshengyuqi,yijuturangyangfenhanliangpeifangshifei,keyidadatigaonongzuowudechanliang,jieyueshengchanchengben。xianjiubutongzhongleishucaideshifeifangfajiandanjieshaoruxia。
蔬菜一般為短期營養作物,可複播多茬,由於生長期短,單位時間內吸收的養分反而比生長期較長、單產高的蔬菜多得多。因此,栽培時應多施速效肥。一般根係入土深而廣、須根多、根毛發達的蔬菜能吸收較多的養分,施肥可以粗放些;而根係發育差、分布淺、吸收養分差,要精細施肥。
shucaiyoumiaoqigenxishangbufada,xishouyangfenshuliangbutaiduo,danduifeiliaoyaoqiuhengao,yingshidangshixiexibodesuxiaofeiliao。shucaiyingyangshengchangqihejieguoqi,zeyaoxishoudaliangyangfen,bixugonggeichongzudefeiliao,tongchangcaiqufenqizhuifei、有機肥和無機肥交替、氮磷鉀肥與微肥平衡、施肥與灌溉相結合等措施,以充分發揮肥料的增產作用。
不同蔬菜需要采用不同的施肥技術與方法。
1、葉菜類:葉菜類主要有白菜、青菜、菠菜、莧菜等。葉菜類追肥以氮肥為主,但生長盛期在施用氮肥的同時,還需增施磷、鉀jia肥fei。如ru栽zai培pei大da白bai菜cai,開kai始shi進jin入ru蓮lian座zuo期qi和he包bao心xin前qian的de兩liang次ci施shi肥fei是shi豐feng產chan的de關guan鍵jian。若ruo全quan生sheng育yu期qi氮dan肥fei供gong應ying不bu足zu,則ze植zhi株zhu矮ai小xiao,組zu織zhi粗cu硬ying,春chun季ji栽zai培pei的de葉ye菜cai還hai易yi早zao期qi抽chou薹tai。若ruo結jie球qiu類lei葉ye菜cai後hou期qi磷lin、鉀肥不足,往往不易結球。
2、果菜類:果菜類包括瓜類、qieguoleihedoulei,shiyongbufendoushishengzhiqiguan。yibanyoumiaoxudanfeiliangjiaoduo,danguoduoshiyongdanfeiyiyinqituchang,faneryanchangkaihuajieguo,daozhiluohualuoguo。jinrushengzhishengchangqi,xulinfeiliangjuzeng,xudanfeilianglvejian,yinciyaozengshilin、鉀肥,節製氮肥用量。黃瓜坐瓜後,應重施肥,每結一批瓜需補充一次肥水。
3、根菜類:根菜類主要有蘿卜、胡蘿卜等,食用部分是肉質根。根菜類生長前期要多施氮肥,促使形成肥大的綠葉。生長中後期(肉質根生長期)yaoduoshijiafei,shidangkongzhidanfeiyongliang,cujinyedetonghuawuzhiyunshudaogenzhong,yibianxingchengqiangdaderouzhigen。ruguozaigencaishengchanghouqidanfeiguoduoerjiafeibuzu,yishidishangbufentuchang,genjingxixiao,chanliangxiajiang,pinzhibianlie。
設(she)施(shi)栽(zai)培(pei)的(de)蔬(shu)菜(cai)宜(yi)多(duo)施(shi)用(yong)有(you)機(ji)肥(fei)。因(yin)為(wei)大(da)棚(peng)等(deng)保(bao)護(hu)地(di)蔬(shu)菜(cai),比(bi)露(lu)地(di)蔬(shu)菜(cai)單(dan)位(wei)麵(mian)積(ji)施(shi)肥(fei)量(liang)大(da)得(de)多(duo),且(qie)因(yin)無(wu)雨(yu)水(shui)淋(lin)失(shi),致(zhi)使(shi)剩(sheng)餘(yu)的(de)肥(fei)料(liao)大(da)部(bu)分(fen)殘(can)留(liu)於(yu)土(tu)壤(rang)中(zhong),使(shi)土(tu)壤(rang)溶(rong)液(ye)養(yang)分(fen)濃(nong)度(du)過(guo)高(gao),妨(fang)礙(ai)根(gen)係(xi)吸(xi)收(shou)養(yang)分(fen),所(suo)以(yi)在(zai)保(bao)護(hu)地(di)栽(zai)培(pei)蔬(shu)菜(cai),應(ying)充(chong)分(fen)考(kao)慮(lv)前(qian)茬(cha)肥(fei)料(liao)的(de)後(hou)效(xiao),多(duo)施(shi)有(you)機(ji)肥(fei),適(shi)當(dang)少(shao)施(shi)化(hua)肥(fei),避(bi)免(mian)因(yin)鹽(yan)類(lei)積(ji)聚(ju)而(er)使(shi)後(hou)茬(cha)蔬(shu)菜(cai)受(shou)害(hai)。
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