大棚黃瓜由於環境優,長勢強、高產優質,對營養要求也高,畝產1萬公斤黃瓜果實,要求土壤有機質2.5—3.0%,速效氮、磷、鉀分別為27.3、13.0、34.7公斤,並加上微量元素的均衡供應。我縣土壤有機質普遍缺乏,僅1.24%,耕(geng)層(ceng)茂(mao),速(su)效(xiao)氮(dan)不(bu)足(zu),鹽(yan)指(zhi)數(shu)高(gao),是(shi)製(zhi)約(yue)我(wo)縣(xian)大(da)棚(peng)黃(huang)瓜(gua)產(chan)量(liang)不(bu)高(gao)的(de)主(zhu)要(yao)障(zhang)礙(ai)因(yin)素(su)。增(zeng)肥(fei)地(di)力(li),促(cu)進(jin)營(ying)養(yang)平(ping)衡(heng),提(ti)高(gao)大(da)棚(peng)土(tu)壤(rang)生(sheng)產(chan)潛(qian)力(li),是(shi)黃(huang)瓜(gua)高(gao)產(chan),優(you)質(zhi)的(de)基(ji)礎(chu)措(cuo)施(shi)。如(ru)何(he)增(zeng)肥(fei)地(di)力(li)呢(ne)?
首shou先xian是shi要yao增zeng施shi有you機ji肥fei。這zhe是shi增zeng肥fei地di力li的de基ji礎chu,更geng是shi新xin建jian大da棚peng生sheng土tu熟shu化hua的de關guan鍵jian。因yin為wei有you機ji肥fei是shi一yi種zhong完wan全quan肥fei料liao,在zai大da棚peng黃huang瓜gua生sheng產chan中zhong,它ta不bu僅jin能neng供gong給gei作zuo物wu生sheng育yu所suo必bi須xu的de各ge種zhong營ying養yang成cheng分fen,而er且qie對dui農nong業ye持chi續xu高gao產chan,活huo化hua土tu壤rang養yang分fen,改gai良liang土tu壤rang都dou有you主zhu要yao作zuo用yong。據ju實shi踐jian,有you機ji肥fei有you以yi下xia五wu個ge特te點dian:①有機肥施入土壤,經微生物分解,可源源不斷地釋放出各種養分供黃瓜吸收,還能釋放出二氧化碳,改善作物碳素營養;②有機肥在分解過程中,產生腐殖質,胡敏酸、氨基酸、黃腐酸等,對種子萌發,根係生長均有刺激作用,促進了作物生化代謝;③youjifeishigailiangturangdezhuyaowuzhi。weishengwuzaifenjieguochengzhongshengchengfenmimei,fuzhizhi,tiaojieturangwuzhihejinxingnengliangzhuanhua,cujinturangtuanlijiegouxingcheng,zengqiangturangbaoshuibaofeinengli;④有機肥可提高土壤難溶性磷的有效性;⑤可ke增zeng加jia產chan量liang和he改gai善shan品pin質zhi。有you機ji肥fei配pei施shi適shi量liang化hua肥fei,能neng協xie調tiao黃huang瓜gua生sheng長chang與yu結jie果guo矛mao盾dun,提ti高gao抗kang逆ni能neng力li,色se豔yan瓜gua條tiao直zhi,刺ci粒li飽bao滿man,可ke大da大da提ti高gao商shang品pin率lv。一yi般ban畝mu施shi腐fu熟shu雞ji糞fen4—6方,廄配5—8方。
第二是要重視應用生物菌肥。一般土壤耕層每畝配合全鉀、全磷分別達180和120公斤以上,但80—90%作物不能直接吸收利用。施用複合生長肥,可以加速土壤有機殘體和難溶性磷、鉀jia和he其qi它ta礦kuang物wu養yang分fen的de分fen解jie轉zhuan化hua。增zeng施shi有you機ji肥fei和he生sheng物wu菌jun肥fei,適shi當dang減jian少shao化hua肥fei,更geng是shi生sheng產chan無wu公gong害hai綠lv色se食shi品pin的de必bi然ran選xuan擇ze。而er新xin建jian大da棚peng土tu壤rang熟shu化hua尤you其qi配pei合he多duo施shi生sheng物wu肥fei,各ge地di的de實shi踐jian證zheng明ming:施優質有機生物肥7.5—10公斤,黃瓜植株健壯、坐瓜多,瓜條長,采摘期延長,一次施用,全生育期受益,效果奇特。
第三是要廣泛施用腐熟人糞尿。氮是作物生長的基本元素,對花芽分化,瓜條充實都起著重要作用。據調查我縣大棚土壤氮、磷、鉀比為1∶1.7∶2.4,duiduonianzhushilinsuanerandexuduodapeng,yingtebiezhuyibuchongdanfei。renfenniaoyangfenwanquan,dansufengfu,gejiagehudouyou,huangguashengchangqiguangfanshiyongfushurenfenniao,bingjiehejiaoshuichongshixiaoguozuihao。xinjiandapengzekezaidingzhiqianjiaoshi,yeyouliyushengtushuhua。
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