玉米良种配套高产栽培技术研究

Study on the Coordination of Cultural Technics for HighYield of Fine Maize Varieties

采用正交设计对３ 个玉米良种进行了多因子栽培试验。初步结果表明：“豫玉２２ 号”、“农大１０８”与“掖单１３ 号”相比，在产量等方面具有一定的优势，适宜江西种植。在土壤肥力较高的条件下，“豫玉２２ 号”较适宜种植密度为５．００～５．２５ 万株ｈｍ２ ，“农大１０８”为５．２５～６．００ 万株ｈｍ２ ，“掖单１３ 号”则不低于６．００ 万株ｈｍ２ 。尿素和氯化钾施用量分别以３７５～４５０ｋｇｈｍ２ 和３００ ～３７５ｋｇｈｍ２ 较合适，在施用时期上，以总施用量的２０％～２５％ 作底肥或种肥和以２５％ ～３０％ 作苗肥或拔节肥相结合，并以约５０％ 的量作穗肥，增产效果显著。

The multi-factor cultural experimnet on three fine maize varieties was conducted by orthogonal design in 1999.The preliminary results showed that “Yuyu 22” and “Nongda 108” were higher than “Yedan 13” in seed yield and superior to “Yedan 13” in main characters.So it was suggested that “Yuyu 22” and “Nongda 108” were suitable for being planted in Jiangxi,and their proper planting densities in the better fertility of soil were as follows:“Yuyu 22” nearly 50 000～52 500 plants/hm\+2,“Nongda 108” 52 500～60 000 plants/hm\+2,“Yedan 13” more than 60 000 plants/hm\+2.Meanwhile,the proper amount of applying urea and KCl was 375～450kg/hm\+2 and 300～375 kg/hm\+2 respectively,and the fertilizer applying periods were 20%～25% of total of urea and KCl for sowing, 25%～30% for seedling or jointing stage,and about 50% for booting.\;