1、要注意增施速效氮肥
禾本科作物秸稈含纖維素較高,達 30%~40%,還田後土壤中碳素物質會陡增,一般要增加1倍左右。而微生物的增長是以碳素為能源、以yi氮dan素su為wei營ying養yang的de,微wei生sheng物wu必bi須xu從cong土tu壤rang中zhong吸xi取qu氮dan素su以yi補bu不bu足zu,也ye就jiu造zao成cheng了le與yu作zuo物wu爭zheng氮dan的de現xian象xiang。若ruo沒mei有you增zeng施shi氮dan肥fei,就jiu容rong易yi導dao致zhi土tu壤rang中zhong氮dan素su不bu足zu,影ying響xiang育yu苗miao苗miao期qi生sheng長chang。因yin而er,秸jie稈gan還hai田tian時shi增zeng施shi氮dan肥fei顯xian得de尤you為wei重zhong要yao,它ta可ke以yi起qi到dao加jia速su秸jie稈gan腐fu解jie,保bao證zheng作zuo物wu苗miao期qi生sheng長chang旺wang盛sheng的de雙shuang重zhong功gong效xiao。一yi般ban來lai說shuo,小xiao麥mai秸jie稈gan還hai田tian後hou每mei畝mu應ying增zeng施shi尿niao素su30公斤或碳酸氫銨50公斤,滿足秸稈分解所需。
2、要注意翻壓覆蓋
一(yi)般(ban)來(lai)說(shuo),在(zai)作(zuo)物(wu)收(shou)獲(huo)後(hou)就(jiu)應(ying)立(li)即(ji)把(ba)秸(jie)稈(gan)翻(fan)耕(geng)入(ru)土(tu),避(bi)免(mian)因(yin)秸(jie)稈(gan)被(bei)曬(shai)幹(gan)而(er)影(ying)響(xiang)腐(fu)熟(shu)速(su)度(du),最(zui)好(hao)邊(bian)收(shou)邊(bian)耕(geng)埋(mai)翻(fan)壓(ya)。然(ran)而(er),小(xiao)麥(mai)收(shou)獲(huo)後(hou)一(yi)般(ban)很(hen)少(shao)進(jin)行(xing)土(tu)壤(rang)翻(fan)耕(geng),小(xiao)麥(mai)秸(jie)稈(gan)暴(bao)露(lu)在(zai)地(di)表(biao),常(chang)被(bei)風(feng)吹(chui)走(zou),也(ye)影(ying)響(xiang)秸(jie)稈(gan)的(de)腐(fu)解(jie)。因(yin)此(ci),小(xiao)麥(mai)收(shou)獲(huo)後(hou)要(yao)注(zhu)意(yi)進(jin)行(xing)適(shi)當(dang)的(de)翻(fan)壓(ya)覆(fu)蓋(gai),固(gu)定(ding)秸(jie)稈(gan),並(bing)促(cu)進(jin)秸(jie)稈(gan)快(kuai)速(su)分(fen)解(jie)。新(xin)鮮(xian)秸(jie)稈(gan)在(zai)腐(fu)熟(shu)過(guo)程(cheng)中(zhong)會(hui)產(chan)生(sheng)各(ge)種(zhong)有(you)機(ji)酸(suan),對(dui)作(zuo)物(wu)根(gen)係(xi)有(you)毒(du)害(hai)作(zuo)用(yong)。因(yin)此(ci),在(zai)酸(suan)性(xing)和(he)透(tou)氣(qi)性(xing)差(cha)的(de)土(tu)壤(rang)中(zhong)進(jin)行(xing)秸(jie)稈(gan)還(hai)田(tian)時(shi),應(ying)施(shi)入(ru)適(shi)量(liang)的(de)石(shi)灰(hui),以(yi)30-40千克/畝為宜。
3、要注意防治病蟲害
一般條件下,秸稈還田後病蟲害有加重發生的趨勢。尤其是蠐螬、lougudengdixiahaichong,jinjinianerdianweiyeeyeshifenyanzhong。weifushudejiegankegongqiqushihefanzhi。zaibufangengtudideqingkuangxia,biyaoshiyinglouloumaijie,fouzejieganzhongdebingyuanjunhechongluandeng,yehuijinruturangzhong,zengjiaxiayichazuowushoudaoweihaidejilv。suoyi,zaijiangjieganshiruturangzhiqian,keyongyaojijiangjieganjinxingxiaodu,yongbaijunqing500倍混加辛硫磷1000倍將秸稈噴灑一遍,以減少病原菌和蟲卵的危害。
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