玉米籽粒低破碎機(jī)械化收獲技術(shù)在河南的嘗試

2019-05-07 09:22:46 來(lái)源:河南省農(nóng)機(jī)技術(shù)推廣站  閱讀量:15755 評(píng)論

  【農(nóng)機(jī)網(wǎng) 地方農(nóng)機(jī)】玉米籽粒低破碎機(jī)械化收獲技術(shù)是農(nóng)業(yè)農(nóng)村部2018年發(fā)布的十項(xiàng)重大性農(nóng)業(yè)技術(shù)之一。為了驗(yàn)證該技術(shù)在河南的應(yīng)用效果,為推廣提供科學(xué)依據(jù),2018年5月至11月,在3個(gè)縣進(jìn)行了試驗(yàn)。結(jié)果表明,試驗(yàn)的8個(gè)玉米品種中,迪卡517、新單65、新單68基本能夠滿足籽粒機(jī)械化直收要求;河南豪豐4YZL-5自走式玉米籽粒收獲機(jī)在試驗(yàn)的6款機(jī)具中表現(xiàn)較好;收獲時(shí)籽粒含水率低于23%的品種機(jī)械化籽粒收獲效果較好。試驗(yàn)結(jié)果仍需多年試驗(yàn)進(jìn)一步驗(yàn)證。
 
  一、試驗(yàn)背景
 
  不能實(shí)現(xiàn)玉米籽粒機(jī)械化直接收獲,是我國(guó)玉米生產(chǎn)成本高的重要因素之一。玉米是我國(guó)重要的糧食作物,種植面積和總站量長(zhǎng)期占糧食作物的位。由于大部分地區(qū)玉米收獲時(shí)籽粒含水量較高,不得不采取機(jī)械化摘穗、果穗晾曬、脫粒、籽粒晾曬或烘干的技術(shù)路線,環(huán)節(jié)多、人工成本高。而美國(guó)等玉米生產(chǎn)大國(guó)已經(jīng)在上世紀(jì)60年代實(shí)現(xiàn)了玉米籽粒直接機(jī)械化收獲。探索我國(guó)玉米籽粒直收機(jī)械化技術(shù),對(duì)降低玉米生產(chǎn)成本、增加農(nóng)民收入具有重要意義。
 
  制約我國(guó)玉米籽粒直收的主要因素是籽粒含水量高導(dǎo)致的破碎率高、商品率低。本試驗(yàn)通過(guò)試驗(yàn)驗(yàn)證和技術(shù)集成,優(yōu)選適宜本地玉米籽粒機(jī)械化收獲的機(jī)械、品種和栽培方式,探索破解的途徑。
 
  二、試驗(yàn)設(shè)計(jì)
 
  為了做好試驗(yàn)驗(yàn)證工作,項(xiàng)目組制定了《玉米籽粒低破碎機(jī)械化收獲技術(shù)試驗(yàn)方案》,選擇玉米種植面積較大,開展本試驗(yàn)基礎(chǔ)條件較好的漯河市舞陽(yáng)縣、濮陽(yáng)市濮陽(yáng)縣和南陽(yáng)市唐河縣,依托采用玉米籽粒收獲積極性較高的新型農(nóng)機(jī)合作組織落實(shí)試驗(yàn)工作,當(dāng)年累計(jì)試驗(yàn)示范面積1050畝。
 
  選擇各試驗(yàn)地點(diǎn)使用較多的河南豪豐4YZL-5自走式玉米籽粒收獲機(jī)(機(jī)具A)、中聯(lián)重科4YZL-5BZ1自走式玉米籽粒收獲機(jī)(機(jī)具B)、山東金億MCH80自走式玉米籽粒收獲機(jī)(機(jī)具C),以及與谷物聯(lián)合收獲機(jī)配套的喜盈盈玉米專用割臺(tái)(機(jī)具D)、厚德牌玉米專用割臺(tái)(機(jī)具E)、沃德牌玉米專用割臺(tái)(機(jī)具F),對(duì)其作業(yè)性能指標(biāo)進(jìn)行了測(cè)試。
 
  為測(cè)試作業(yè)的效果,組織專家在成熟季節(jié)測(cè)定了各試驗(yàn)的籽粒含雜率、收獲損失率、籽粒破碎率以及收獲時(shí)玉米的含水率等技術(shù)指標(biāo)。
 
  三、試驗(yàn)結(jié)果
 
  國(guó)標(biāo)《玉米收獲機(jī)械技術(shù)條件》(GB/T21962-2008)要求,直接脫粒的玉米收獲方式,收獲損失率不超過(guò)5%、籽粒破碎率不超過(guò)5%、籽粒含雜率不超過(guò)3%。經(jīng)測(cè)定,8個(gè)玉米品種的部分特性,以及6款玉米籽粒收獲機(jī)械的作業(yè)結(jié)果見下表。可以看出:
 
   從8個(gè)品種的表現(xiàn)來(lái)看,京農(nóng)科728收獲的損失率明顯高于規(guī)定標(biāo)準(zhǔn),其他品種突出的問(wèn)題,主要是籽粒的破碎率比較高。8個(gè)品種中,迪卡517、新單65、新單68等3個(gè)品種的基本能夠滿足籽粒直收要求。
 
  第二 從6款機(jī)具來(lái)看,共性問(wèn)題是收獲是作業(yè)籽粒破碎率過(guò)高。相對(duì)來(lái)說(shuō),河南豪豐4YZL-5自走式玉米籽粒收獲機(jī)的在收獲損失率、籽粒破碎率、籽粒含雜率三個(gè)指標(biāo)上的表現(xiàn)都比較。中聯(lián)重科4YZL-5BZ1自走式玉米籽粒收獲機(jī)則需要在籽粒含雜率和籽粒破碎率兩個(gè)方面繼續(xù)改進(jìn)。其他機(jī)具改進(jìn)的重點(diǎn)是控制籽粒破碎率。
 
  第三 從收獲時(shí)籽粒含水量低于23%的5個(gè)試驗(yàn)、4個(gè)品種、3款機(jī)具來(lái)看,雖然籽粒含水率為18.6%和21.5%的兩個(gè)試驗(yàn)的收獲效果完全符合國(guó)家標(biāo)準(zhǔn)要求,但由于試驗(yàn)數(shù)據(jù)較少,不能排除品種、機(jī)具和籽粒含水率的綜合影響,不能確定合適籽粒機(jī)收的籽粒含水率。
 
  需要說(shuō)明的是,由于受到干旱、高溫?zé)岷?、臺(tái)風(fēng)、暴雨等災(zāi)害性天氣的影響,試驗(yàn)品種在收獲時(shí)有倒伏、穗下垂、秸稈折斷等現(xiàn)象,對(duì)機(jī)械化籽粒收獲作業(yè)也產(chǎn)生了一定負(fù)面影響。雖然大多數(shù)實(shí)驗(yàn)點(diǎn)都使用了中聯(lián)重科4YZL-5BZ1自走式玉米籽粒收獲機(jī)作為參照,但玉米品種在不同試點(diǎn)之間重復(fù)數(shù)量較少,對(duì)比結(jié)果仍需多年試驗(yàn)數(shù)據(jù)進(jìn)一步驗(yàn)證。
 
  玉米籽粒收獲機(jī)試驗(yàn)結(jié)果
 
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