大棚用肥的種類繁多,按照使用類型分為有機肥、無機肥等。按使用方法分為基肥、追肥。壽光棚菜基肥一般是雞、鴨、豬肥,豆粕、大豆並輔之部分化肥。用什麼樣的肥料、用多少,應注意哪些事項,筆者根據近年來的考察,提出以下幾點建議。
一、各類肥料的特點
(一)畜禽糞肥養分全,適當增施能高產。畜禽糞肥的養分含量全麵,有機質和大、中、微量元素幾乎都有,特別是有機質含量能達到90%yishang,duiyugailiangturang,yanggenfake,youzhigaochanzhiguanzhongyao。chuqinfenfeishuchixiaofeiliao,feixiaochijiuerhuanman,xuyaozaiweishengwufenjiezhuanhuayihoucainenggongzuowuxishou,zaidongchunjijie,yibanxuyao15- 20天才能發揮肥效。因為後勁足,所以能抑製早衰。因為畜禽肥料含有較多的氨基酸和芳香族類物質,適當增施對果實的顏色、光澤、酸甜度都有較大的影響,堅持使用畜禽肥料,果實甜香好吃就是很好的證明。
畜禽糞肥所含礦質養分不是太高,即磷、鉀、鈣、鎂mei等deng都dou是shi有you限xian的de,尤you其qi是shi氮dan素su在zai腐fu熟shu過guo程cheng中zhong大da量liang流liu失shi,含han量liang不bu足zu,遠yuan遠yuan不bu能neng滿man足zu作zuo物wu盛sheng果guo期qi的de需xu要yao,因yin此ci要yao把ba握wo好hao兩liang點dian,一yi是shi施shi肥fei數shu量liang要yao大da。按an壽shou光guang的de經jing驗yan做zuo法fa,一yi般ban每mei畝mu地di基ji施shi10方左右。二是初果期以後要及時追施化肥,補充化學元素的不足。稻殼雞鴨糞養分含量更低,每畝基施20方(fang)以(yi)上(shang)也(ye)是(shi)可(ke)以(yi)的(de),但(dan)連(lian)續(xu)多(duo)年(nian)大(da)量(liang)施(shi)用(yong),能(neng)造(zao)成(cheng)土(tu)壤(rang)深(shen)層(ceng)土(tu)傳(chuan)病(bing)害(hai)加(jia)重(zhong),作(zuo)物(wu)主(zhu)根(gen)係(xi)黑(hei)褐(he)色(se)壞(huai)死(si)。禽(qin)畜(chu)糞(fen)肥(fei)不(bu)能(neng)鮮(xian)用(yong),必(bi)須(xu)經(jing)過(guo)充(chong)分(fen)腐(fu)熟(shu)後(hou)施(shi)用(yong),通(tong)過(guo)腐(fu)熟(shu)能(neng)殺(sha)滅(mie)大(da)部(bu)分(fen)有(you)害(hai)菌(jun)和(he)害(hai)蟲(chong)卵(luan),並(bing)能(neng)使(shi)有(you)害(hai)氣(qi)體(ti)分(fen)解(jie)排(pai)放(fang),否(fou)則(ze)肥(fei)害(hai)燒(shao)根(gen),有(you)的(de)能(neng)造(zao)成(cheng)重(zhong)大(da)損(sun)失(shi)。腐(fu)熟(shu)之(zhi)後(hou)的(de)禽(qin)畜(chu)糞(fen)不(bu)但(dan)能(neng)做(zuo)微(wei)肥(fei),也(ye)是(shi)很(hen)好(hao)的(de)追(zhui)肥(fei),隨(sui)水(shui)衝(chong)施(shi)多(duo)次(ci),對(dui)於(yu)防(fang)早(zao)衰(shuai)增(zeng)產(chan)效(xiao)果(guo)顯(xian)著(zhu),其(qi)優(you)點(dian)是(shi)化(hua)肥(fei)不(bu)能(neng)比(bi)擬(ni)的(de)。禽(qin)畜(chu)糞(fen)肥(fei)做(zuo)基(ji)肥(fei)或(huo)追(zhui)肥(fei),最(zui)好(hao)與(yu)三(san)元(yuan)複(fu)合(he)肥(fei)配(pei)合(he)施(shi)用(yong)。
(二)生物菌肥作用大,改土養根要靠它。
隨sui著zhe大da棚peng菜cai的de重zhong茬cha種zhong植zhi,土tu傳chuan病bing害hai和he自zi毒du物wu質zhi的de積ji累lei日ri趨qu嚴yan重zhong,尤you其qi是shi土tu壤rang顆ke粒li吸xi附fu的de礦kuang質zhi元yuan素su越yue來lai越yue多duo,呈cheng現xian不bu溶rong解jie態tai的de化hua合he物wu,引yin起qi土tu壤rang鹽yan漬zi化hua。要yao改gai變bian土tu壤rang惡e化hua的de態tai勢shi,單dan純chun依yi靠kao化hua學xue農nong藥yao進jin行xing土tu壤rang處chu理li,顯xian然ran是shi難nan以yi做zuo到dao的de。通tong過guo生sheng物wu菌jun肥fei的de施shi用yong,可ke以yi有you效xiao地di解jie決jue土tu壤rang問wen題ti。首shou先xian,菌jun肥fei中zhong的de芽ya孢bao杆gan菌jun或huo酵jiao母mu菌jun等deng,如ru果guo達da到dao足zu夠gou的de數shu量liang,就jiu會hui形xing成cheng一yi定ding的de有you益yi菌jun群qun,有you益yi菌jun群qun在zai作zuo物wu的de根gen際ji一yi是shi能neng限xian製zhi有you害hai微wei生sheng物wu的de繁fan殖zhi侵qin染ran,抑yi製zhi或huo“吃掉”有you害hai菌jun,所suo以yi具ju有you防fang治zhi土tu傳chuan病bing害hai的de作zuo用yong。二er是shi芽ya孢bao杆gan菌jun等deng能neng分fen解jie作zuo物wu的de自zi毒du物wu質zhi,也ye能neng分fen解jie土tu壤rang中zhong已yi被bei固gu定ding的de礦kuang質zhi元yuan素su,使shi多duo年nian不bu能neng被bei作zuo物wu吸xi收shou的de營ying養yang被bei重zhong複fu激ji化hua利li用yong,因yin而er土tu壤rang中zhong的de含han鹽yan量liang也ye就jiu逐zhu漸jian減jian少shao,達da到dao減jian輕qing鹽yan漬zi化hua的de目mu的de。
生物菌肥中的有效菌數量,即活菌數是判斷菌肥優劣的重要指標,一般以含活菌數每克達到2億個以上的為好。活菌數與菌肥的母液或基質密切相關,如果基質含有較多的氮磷鉀,活菌數就不可能太高,因為PHzhidebianhuahejizhideyingyangbuzukenengshiyouyijunbunengcunhuo。lingwai,turangshuifenhediwenyeshixianzhishengwujunzuoyongdezhongyaoyinsu。goumaishengwujunfeishi,yishiyaokanpinpai,rujikangjun968,三炬微生物菌劑,大源、三忠微肥等。二是看有益菌的含量,一般來說,活菌數越多越好。三是看出廠日期,半年期以內的比存放時間長的含量高。
生物菌肥的施用有基施、穴施、goushihechongshi,shiyongshiyaozhuyiturangshidu,dangturangshidujiaodashi,shengwujuncainengfanzhihekuozhan。qicishiturangwenduyaoshiyi,diwentaigaotaididounengyingxiangyouyijundecunhuohezuoyong,yibanchaoguo35℃或低於12℃是(shi)不(bu)適(shi)宜(yi)的(de),所(suo)以(yi)用(yong)了(le)生(sheng)物(wu)菌(jun)肥(fei)後(hou)不(bu)能(neng)進(jin)行(xing)高(gao)溫(wen)悶(men)棚(peng)。再(zai)是(shi)生(sheng)物(wu)菌(jun)肥(fei)可(ke)以(yi)和(he)有(you)機(ji)肥(fei)混(hun)施(shi),有(you)機(ji)肥(fei)同(tong)時(shi)作(zuo)為(wei)有(you)益(yi)菌(jun)的(de)基(ji)質(zhi),為(wei)其(qi)提(ti)供(gong)更(geng)多(duo)的(de)營(ying)養(yang)而(er)增(zeng)強(qiang)其(qi)活(huo)性(xing),但(dan)與(yu)化(hua)肥(fei)混(hun)施(shi)時(shi)一(yi)定(ding)要(yao)慎(shen)用(yong),尤(you)其(qi)是(shi)穴(xue)施(shi)、溝施和衝施時,化肥用量一定要少。另外,使用生物菌肥後,一般不能用殺菌劑進行灌根和衝施,特別是抗生素和銅製劑類。
(三)、化hua肥fei養yang分fen含han量liang高gao,適shi時shi追zhui施shi見jian效xiao快kuai。從cong現xian代dai的de化hua肥fei工gong業ye興xing起qi之zhi後hou,化hua肥fei具ju有you養yang分fen含han量liang高gao,速su效xiao性xing好hao的de特te點dian,對dui作zuo物wu的de增zeng產chan作zuo用yong具ju有you劃hua時shi代dai的de意yi義yi,在zai整zheng個ge大da棚peng用yong肥fei總zong量liang中zhong,按an有you效xiao成cheng分fen計ji算suan,可ke以yi達da到dao總zong供gong肥fei量liang的de80%以上,一般以追施和根外追肥為主。
從作物的需肥規律講,16種必需元素是必不可少的。構成植物體的主要元素是碳、氫、氧,占植物體總重量的40%以上,它的來源是空氣和水,而其它13種(zhong)元(yuan)素(su)幾(ji)乎(hu)都(dou)可(ke)以(yi)用(yong)化(hua)肥(fei)來(lai)進(jin)行(xing)補(bu)充(chong)。並(bing)且(qie)無(wu)論(lun)什(shen)麼(me)優(you)質(zhi)的(de)有(you)機(ji)肥(fei),通(tong)過(guo)微(wei)生(sheng)物(wu)的(de)作(zuo)用(yong),也(ye)要(yao)轉(zhuan)化(hua)為(wei)供(gong)作(zuo)物(wu)吸(xi)收(shou)的(de)礦(kuang)質(zhi)元(yuan)素(su)才(cai)行(xing),從(cong)本(ben)質(zhi)上(shang)講(jiang),一(yi)切(qie)的(de)肥(fei)料(liao),本(ben)身(shen)含(han)有(you)的(de)或(huo)轉(zhuan)化(hua)形(xing)成(cheng)的(de),最(zui)終(zhong)必(bi)須(xu)成(cheng)為(wei)以(yi)上(shang)16種zhong元yuan素su才cai能neng被bei作zuo物wu吸xi收shou利li用yong。之zhi所suo以yi化hua肥fei具ju有you直zhi接jie的de速su效xiao性xing原yuan理li就jiu在zai於yu此ci。因yin此ci,大da棚peng以yi化hua肥fei促cu進jin蔬shu菜cai生sheng長chang,形xing成cheng比bi較jiao高gao的de產chan量liang也ye就jiu勢shi在zai必bi然ran了le。
congfazhandequshikan,dapengshiyongdanyiyuansuhuafeidefangshiyuelaiyueluohou,cainongcongshengchanshijianzhongyezhujianrenshidao,zuowuxishoufeiliaoshiyoubilide,shiduozhongyingyangyuansutongshixishoude,bixuanzhaozuowudexufeiguilvjinxingpeifangshifeicaikexueheli,suoyiduoyuansufuhefei,kongshifei、緩釋肥也就應運而生。
葉菜類屬喜氨的作物,單一追施氮肥即能形成較高的產量,而茄果類類、豆類蔬菜,它們生長發育的全過程氮磷鉀所需要的比例大體為2:1:4,yejiushiyaoyijiasuweizhu,youjingyandecainongwangwangduoxuanyonggaojiadefuhefeishiyong。shijianzhengming,xiaotaidangengyouliyuzuowudexishou,dantairongyibeiturangguding,xiaoguocha,langfeida。linfeiyinyidongxingcha,rongyibeiturangguding,yaoyijishiweizhu,keyizaishenfanshiyicixingshizu,zaizhuifeishiyidihanliangdefuhefeiweihao。gaimeiyuansuzuowuxuqiuliangyehenda,dantamendelaiyuanzhuyaoshiturangheshui,zhongguobeifangguangyishangjiang,zheliangzhongyuansushichongzude,buxuyaoshiyong。weishenmehuiquegai、缺que鎂mei呢ne?往wang往wang不bu是shi因yin為wei土tu壤rang缺que而er形xing成cheng缺que素su症zheng狀zhuang,而er是shi因yin為wei作zuo物wu對dui鈣gai鎂mei的de吸xi收shou和he運yun輸shu受shou阻zu出chu現xian生sheng理li失shi調tiao造zao成cheng的de。例li如ru土tu壤rang幹gan旱han或huo根gen腐fu病bing就jiu很hen容rong易yi引yin起qi臍qi腐fu病bing或huo下xia部bu葉ye片pian發fa黃huang,因yin此ci,單dan純chun購gou買mai使shi用yong鈣gai、鎂肥是不必要的,適當進行葉片噴施即可。
微wei量liang元yuan素su的de定ding義yi說shuo明ming,作zuo物wu生sheng長chang離li了le不bu行xing,多duo了le容rong易yi受shou害hai,即ji產chan生sheng副fu作zuo用yong。缺que鐵tie能neng導dao致zhi嫩nen葉ye發fa黃huang,特te別bie是shi石shi灰hui性xing土tu壤rang中zhong很hen容rong易yi發fa生sheng黃huang葉ye病bing。缺que硼peng能neng引yin起qi作zuo物wu花hua而er不bu實shi。缺que鋅xin產chan生sheng黃huang葉ye和he“小葉病”。土壤化驗說明,我國北方容易缺少這三種微量元素肥料,至於錳、銅,一般通過噴藥過程就已經飽和,甚至超標,不提倡基施或追施。微量元素作基肥時,一般每畝施用1-2公斤即可,如果葉麵噴施,可兌成0.1-0.3%的溶液,整個生長期噴用2-3次為宜。
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