今年很多棚室黃瓜因土壤性質變劣,使黃瓜根係生長不良,抗逆性降低,當冷空氣來時不能忍受長時間陰冷,因而導致了減產。
看來,培育健壯的根係是黃瓜提高抗逆性,獲得增產的必要手段。而決定蔬菜根係健壯、抗kang逆ni性xing高gao低di的de關guan鍵jian是shi土tu壤rang的de透tou氣qi性xing。隻zhi有you土tu壤rang透tou氣qi性xing強qiang,氧yang氣qi充chong足zu,根gen係xi的de呼hu吸xi作zuo用yong充chong分fen,產chan生sheng較jiao多duo的de能neng量liang,根gen係xi吸xi收shou能neng力li才cai強qiang,才cai能neng長chang出chu壯zhuang棵ke,黃huang瓜gua抗kang逆ni性xing才cai能neng提ti高gao,產chan量liang才cai能neng增zeng加jia。如ru何he提ti高gao土tu壤rang的de透tou氣qi性xing呢ne?
shouxian,zengshiyoujifei,jieganhaitian,tigaoturangzhongyoujizhihanliang,shitigaoturangtouqixingdegenbencuoshi。turangyoujizhishishiturangtuanlijiegouxingchengbukequeshaodezhutichengfen。youjizhihanlianggao,turangshusong,touqixinghaodeturang,womenchengzhiwei“海綿田”,作物產量最高。資料顯示,山東地區多數土壤的有機質含量在1%左右,低於適合蔬菜生長2%的界限。因此,增施有機肥和秸稈還田對改良土壤、提高土壤透氣性是十分必要的。
其次,將大水漫灌改為滴灌,合理澆水。
傳統的溝灌、畦灌等對土壤侵蝕、壓ya實shi的de作zuo用yong很hen強qiang,土tu壤rang的de團tuan粒li結jie構gou便bian被bei破po壞huai,不bu利li於yu土tu壤rang保bao水shui保bao肥fei性xing的de提ti高gao。而er在zai棚peng室shi蔬shu菜cai生sheng長chang起qi來lai後hou,又you覆fu蓋gai著zhe地di膜mo,中zhong耕geng鬆song土tu的de難nan度du較jiao大da,土tu壤rang板ban結jie也ye就jiu無wu法fa打da破po了le。
滴(di)灌(guan)不(bu)同(tong)於(yu)大(da)水(shui)漫(man)灌(guan),它(ta)慢(man)慢(man)地(di)侵(qin)潤(run)土(tu)壤(rang),對(dui)土(tu)壤(rang)破(po)壞(huai)作(zuo)用(yong)小(xiao)。在(zai)青(qing)州(zhou)等(deng)地(di),滴(di)灌(guan)已(yi)經(jing)推(tui)廣(guang)多(duo)年(nian)的(de)地(di)區(qu),菜(cai)農(nong)普(pu)遍(bian)反(fan)映(ying),使(shi)用(yong)滴(di)灌(guan)的(de)棚(peng)內(nei)土(tu)壤(rang)更(geng)加(jia)疏(shu)鬆(song),透(tou)氣(qi)性(xing)更(geng)強(qiang)。
再次重施生物菌肥,提高微生物活性。
youyuchangshijiandelianzuozhongzhi,daozhiturangzhongyouhaiweishengwujilei,eryouyiweishengwujiuhuijianshao,rongyifashenggenbubinghai,shishucaibunengzhengchangshengchang。youhaiweishengwudejileiduiturangxingzhiyeyoujiaodadeyingxiang。
很多有益微生物本身就有改良土壤、提(ti)高(gao)土(tu)壤(rang)透(tou)氣(qi)性(xing)的(de)作(zuo)用(yong),在(zai)繁(fan)殖(zhi)的(de)同(tong)時(shi)一(yi)方(fang)麵(mian)可(ke)以(yi)疏(shu)鬆(song)土(tu)壤(rang),另(ling)一(yi)方(fang)麵(mian)在(zai)分(fen)解(jie)土(tu)壤(rang)被(bei)固(gu)定(ding)的(de)營(ying)養(yang)元(yuan)素(su)的(de)同(tong)時(shi),也(ye)會(hui)產(chan)生(sheng)一(yi)些(xie)促(cu)進(jin)根(gen)係(xi)生(sheng)長(chang)的(de)物(wu)質(zhi),對(dui)根(gen)係(xi)的(de)生(sheng)長(chang)十(shi)分(fen)有(you)利(li)。因(yin)此(ci)須(xu)通(tong)過(guo)施(shi)用(yong)生(sheng)物(wu)菌(jun)肥(fei),增(zeng)加(jia)土(tu)壤(rang)中(zhong)有(you)益(yi)菌(jun)的(de)數(shu)量(liang),使(shi)土(tu)壤(rang)中(zhong)的(de)有(you)益(yi)微(wei)生(sheng)物(wu)重(zhong)新(xin)占(zhan)據(ju)優(you)勢(shi)。
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