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为了探索驻玉216在豫南夏玉米栽培区的适宜播种期,通过7个播期处理研究了驻玉216在不同播期下的主要农艺性状及产量表现。结果表明:随着播期的推迟,驻玉216生育期缩短,株高和穗位高先升后降,生育后期灌浆缓慢,粒重明显下降,产量显著降低。综合考虑豫南夏玉米生产实际和粗缩病发病情况,驻玉216在豫南的适宜播期为5月25日至6月10日,力争6月5日前后完成贴茬直播。
In order to explore the suitable sowing date of Yu-jia 216 in the summer maize cultivation area in south Henan, the main agronomic characters and yield performance of Yu-jing 216 under different sowing dates were studied through seven sowing dates. The results showed that with the delay of sowing date, the growth period of Yu-216 shortened, the plant height and ear height increased first and then decreased, and the late filling period slowed down, the grain weight decreased obviously and the yield decreased significantly. Taking into account the actual production of summer maize in South Henan and the incidence of coarse and contractive diseases, the suitable sowing date of Yuyu 216 in southern Henan is from May 25 to June 10, and strive to complete the stubble broadcast live before and after June 5.