玉米新品种君实658的选育及高效栽培

Breeding and Efficient Cultivation of New Maize Variety Junshi 658

君实658是以自选系P33为母本、自选系P88为父本杂交选育而成的中熟、个头低、穗位低、活秆成熟、易密植、抗倒伏的优质玉米杂交种。该品种在山西春播区生育期为127 d,需≥10℃活动积温2 750℃,适宜东华北中晚熟春播区种植,具有高产、稳产、优质、多抗和适应性广及适宜机械化收获等特点。2014年参加山西省春播中熟玉米高密组区域试验,平均公顷产量为15 784.8 kg,比对照利民33平均增产8.3%;2015-2016年参加山西省春播中晚熟玉米耐密组区域试验,2 a平均公顷产量为13 506.0 kg,比对照先玉335平均增产5.9%;2017年参加山西省春播中晚熟玉米耐密组生产试验,平均公顷产量为12 897.0 kg,比对照先玉335平均增产9.4%。2018年通过山西省农作物品种审定委员会审定(晋审玉20180032)。

Junshi 658 was a high quality hybrid with medium maturity,low head,low ear position,mature culm,close planting and lodging resistance.The growth period of the variety was 127 d in the spring sowing area of Shanxi province.It needed≥10℃active accumulated temperature of 2750℃,and the suitable planting density was 60000-67500 plants/hm^2.It was suitable for planting in the spring sowing area of middle late maturity in Northeast and North China.It had the characteristics of high yield,stable yield,high quality,multi resistance,wide adaptability and suitable for mechanized harvest.In 2014,the variety participated in the high density group regional test of spring sowing medium and late maturity maize in Shanxi province,the average yield was 15784.8 kg/hm^2,which was 8.3%higher than that of the control Limin 33.In 2015-2016,the variety participated in the regional test of spring sowing medium and late maturity maize in Shanxi province,the average yield was 13506.0 kg/hm^2,which was 5.9%higher than that of the control Xianyu 335.In 2017,the variety participated in the production test of spring sowing medium and late maturity maize in Shanxi province,the average yield was 12897.0 kg/hm^2,which was 9.4%higher than that of Xianyu 335.It was approved by the Crop Variety Approval Committee of Shanxi province(Jinshenyu 20180032)in 2018.