品種名稱：瑞普909

      申 請 者：山西省農業科(ke)學院玉米研究(jiu)所

      育 種 者：山西(xi)省農(nong)業科學院玉米研究所

      品種來源：RP86×RP06

      特征特性：東華北中晚熟春玉米組出苗至成熟128天(tian)左右(you)，比對照鄭單958早(zao)熟2天(tian)左右(you)。幼苗葉(xie)(xie)鞘紫色(se)，葉(xie)(xie)片(pian)綠色(se)，葉(xie)(xie)緣(yuan)紫色(se)，花藥(yao)紫色(se)，穎殼綠色(se)。株型緊湊(cou)，株高276厘(li)米，穗(sui)位高103厘(li)米，成株葉(xie)(xie)片(pian)數20.6片(pian)。果穗(sui)筒型，穗(sui)長(chang)19.2厘(li)米，穗(sui)行數16～18行，穗(sui)軸紅(hong)，籽(zi)粒黃色(se)、半馬齒，百(bai)粒重36.4克。接種鑒定(ding)，抗大斑(ban)病，感(gan)絲黑穗(sui)病，感(gan)灰斑(ban)病，抗莖腐(fu)病，抗穗(sui)腐(fu)病。品質分析，籽(zi)粒容重757克/升，粗(cu)蛋白含量8.6%，粗(cu)脂肪含量3.8%，粗(cu)淀粉含量75.3%，賴氨酸含量0.3%。

      產量表現：2016～2017年參加東華北中(zhong)晚熟春玉米(mi)組(zu)區域試驗，兩年平均畝(mu)(mu)產833.4千克，比對照鄭單(dan)958增產4.8%。2017年生產試驗，平均畝(mu)(mu)產841.2千克，比對照鄭單(dan)958增產7.4%。

      栽培技術要點：中等肥力以上地塊栽培，4月下旬至5月上旬播(bo)種(zhong)，畝種(zhong)植密度4500株。注意防(fang)治絲黑穗病及灰斑(ban)病。

      審定意見：該品種(zhong)符合國家玉米品種(zhong)審定(ding)標準，通(tong)過審定(ding)。適宜(yi)在東(dong)華北(bei)中晚(wan)熟春(chun)玉米區(qu)(qu)(qu)的(de)(de)吉林省四平市(shi)(shi)(shi)(shi)(shi)(shi)、松(song)原市(shi)(shi)(shi)(shi)(shi)(shi)、長(chang)春(chun)市(shi)(shi)(shi)(shi)(shi)(shi)的(de)(de)大(da)部分地區(qu)(qu)(qu)，遼源市(shi)(shi)(shi)(shi)(shi)(shi)、白城市(shi)(shi)(shi)(shi)(shi)(shi)、吉林市(shi)(shi)(shi)(shi)(shi)(shi)部分地區(qu)(qu)(qu)、通(tong)化市(shi)(shi)(shi)(shi)(shi)(shi)南部；遼寧(ning)省除東(dong)部山(shan)區(qu)(qu)(qu)和(he)大(da)連市(shi)(shi)(shi)(shi)(shi)(shi)、東(dong)港市(shi)(shi)(shi)(shi)(shi)(shi)以外的(de)(de)大(da)部分地區(qu)(qu)(qu)；內蒙(meng)古赤(chi)峰市(shi)(shi)(shi)(shi)(shi)(shi)和(he)通(tong)遼市(shi)(shi)(shi)(shi)(shi)(shi)大(da)部分地區(qu)(qu)(qu)；山(shan)西省忻州(zhou)市(shi)(shi)(shi)(shi)(shi)(shi)、晉中市(shi)(shi)(shi)(shi)(shi)(shi)、太(tai)原市(shi)(shi)(shi)(shi)(shi)(shi)、陽泉市(shi)(shi)(shi)(shi)(shi)(shi)、長(chang)治市(shi)(shi)(shi)(shi)(shi)(shi)、晉城市(shi)(shi)(shi)(shi)(shi)(shi)、呂梁(liang)市(shi)(shi)(shi)(shi)(shi)(shi)平川區(qu)(qu)(qu)和(he)南部山(shan)區(qu)(qu)(qu)；河(he)北(bei)省張家口市(shi)(shi)(shi)(shi)(shi)(shi)、承德(de)市(shi)(shi)(shi)(shi)(shi)(shi)、秦(qin)皇島市(shi)(shi)(shi)(shi)(shi)(shi)、唐山(shan)市(shi)(shi)(shi)(shi)(shi)(shi)、廊(lang)坊市(shi)(shi)(shi)(shi)(shi)(shi)、保定(ding)市(shi)(shi)(shi)(shi)(shi)(shi)北(bei)部、滄州(zhou)市(shi)(shi)(shi)(shi)(shi)(shi)北(bei)部春(chun)播區(qu)(qu)(qu)；北(bei)京市(shi)(shi)(shi)(shi)(shi)(shi)春(chun)播區(qu)(qu)(qu)；天津市(shi)(shi)(shi)(shi)(shi)(shi)春(chun)播區(qu)(qu)(qu)種(zhong)植。