品種名稱： 國瑞(rui) 503

      申(shen) 請 者： 北京華農偉業(ye)種子科技有限公司

      育 種 者： 北京華農偉業種子科技(ji)有(you)限公司、甘肅國瑞恒豐種業有(you)限公司 品種來(lai)源： B2817×G5001

      特征特性： 東華北中(zhong)晚熟春玉米(mi)組出苗至(zhi)成熟 126.5 天(tian)， 比(bi)對(dui)照鄭單 958 早熟 2.5 天(tian)。 幼(you)苗葉鞘紫色(se)， 葉片綠(lv)色(se)，葉緣(yuan)紫色(se)， 花藥淺紫色(se)， 穎殼綠(lv)色(se)。株(zhu)型緊湊， 株(zhu)高(gao)(gao) 290 厘(li)米(mi)， 穗(sui)位高(gao)(gao) 108 厘(li)米(mi)， 果穗(sui)長筒形(xing)， 穗(sui)長 19.7 厘(li)米(mi)， 穗(sui)行數 16－18 行， 穗(sui)軸紅色(se)， 籽粒黃(huang)色(se)、 半馬齒， 百粒重(zhong) 37.0 克(ke)。接種鑒定(ding)，感大斑(ban)(ban)病(bing)， 抗(kang)絲黑穗(sui)病(bing)，感灰斑(ban)(ban)病(bing)， 感莖(jing)腐病(bing)， 中(zhong)抗(kang) 穗(sui)腐病(bing)， 籽粒容重(zhong) 744 克(ke)/升， 粗(cu)(cu)蛋白含(han)量(liang)(liang) 9.66%，粗(cu)(cu)脂肪含(han)量(liang)(liang) 4.15%， 粗(cu)(cu)淀粉含(han)量(liang)(liang) 73.92%， 賴氨酸(suan)含(han)量(liang)(liang) 0.29%。

      產(chan)量表(biao)現： 2019－2020 年參加東(dong)華北中晚熟春玉米組聯合(he)體區域試驗， 兩年平均畝(mu)(mu)產(chan) 819.5 千(qian)克， 比對(dui)照鄭單 958 增(zeng)產(chan) 5.8%。2020 年生(sheng)產(chan)試驗， 平均畝(mu)(mu)產(chan) 822.1 千(qian)克， 比對(dui)照 鄭單 958 增(zeng)產(chan) 9.2%。

      栽培技術要點： 適宜播種期 4 月(yue)下旬至 5 月(yue)上中(zhong)旬， 每畝種植密(mi)度 4000－4500 株，中(zhong) 上等以(yi)上肥力地塊種植。 后期注意防(fang)治葉斑病。

   ;   審定(ding)意(yi)見： 該品種(zhong)符合國家玉(yu)米品種(zhong)審定(ding)標(biao)準， 通過審定(ding)。適宜在東華(hua)北(bei)中晚熟春玉(yu)米 區(qu)(qu)(qu)(qu)的吉(ji)林省(sheng)四平市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、松原市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、長春市(shi)(shi)(shi)(shi)(shi)(shi)(shi)的大(da)部(bu)(bu)分(fen)地(di)(di)區(qu)(qu)(qu)(qu)，遼源(yuan)市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、白城市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、吉(ji)林市(shi)(shi)(shi)(shi)(shi)(shi)(shi)部(bu)(bu)分(fen)地(di)(di)區(qu)(qu)(qu)(qu)、通 化市(shi)(shi)(shi)(shi)(shi)(shi)(shi)南部(bu)(bu)，遼寧省(sheng)除東部(bu)(bu)山(shan)(shan)區(qu)(qu)(qu)(qu)和(he)大(da)連市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、東港市(shi)(shi)(shi)(shi)(shi)(shi)(shi)以外的大(da)部(bu)(bu)分(fen)地(di)(di)區(qu)(qu)(qu)(qu)，內蒙古赤峰市(shi)(shi)(shi)(shi)(shi)(shi)(shi)和(he)通遼市(shi)(shi)(shi)(shi)(shi)(shi)(shi) 大(da)部(bu)(bu)分(fen)地(di)(di)區(qu)(qu)(qu)(qu)，山(shan)(shan)西省(sheng)忻州市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、晉中市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、太原市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、陽(yang)泉市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、長治市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、晉城市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、呂梁市(shi)(shi)(shi)(shi)(shi)(shi)(shi)平川區(qu)(qu)(qu)(qu)和(he) 南部(bu)(bu)山(shan)(shan)區(qu)(qu)(qu)(qu)，河北(bei)省(sheng)張家口(kou)市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、承德(de)市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、秦(qin)皇島市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、唐山(shan)(shan)市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、廊(lang)坊市(shi)(shi)(shi)(shi)(shi)(shi)(shi)、保定(ding)市(shi)(shi)(shi)(shi)(shi)(shi)(shi)北(bei)部(bu)(bu)、滄州市(shi)(shi)(shi)(shi)(shi)(shi)(shi)北(bei) 部(bu)(bu)春播區(qu)(qu)(qu)(qu)，北(bei)京市(shi)(shi)(shi)(shi)(shi)(shi)(shi)春播區(qu)(qu)(qu)(qu)， 天津市(shi)(shi)(shi)(shi)(shi)(shi)(shi)春播區(qu)(qu)(qu)(qu)種(zhong)植。