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为明确嫩单18的适宜种植密度,发挥群体优势,获得高产,以玉米新品种嫩单18为材料,研究了不同种植密度对嫩单18的产量及其农艺性状的影响。结果表明:随着种植密度的增加,嫩单18的株高、穗位高和秃尖长逐渐增加,穗长、百粒重、单穗重和单株干物质积累逐渐减少;群体干物质积累和群体产量显著增加;种植密度6.75万株·hm-2时产量最高,在中等偏上的水肥条件下的适宜种植密度为6.0万~7.5万株·hm-2。
In order to clarify the appropriate planting densities of Nenantai 18 and give play to the advantages of population and obtain high yield, the effects of different planting densities on the yield and agronomic traits of Nendan 18 were studied. The results showed that the plant height, ear height and bald tip length of tender 18 increased gradually with the increase of planting density. The spike length, 100-grain weight, single spike weight and dry matter accumulation per plant decreased gradually. The dry matter accumulation and population The yield was significantly increased. The highest yield was obtained when the planting density was 67,500 plants · hm-2, and the suitable planting density was 60,000 ~ 75,000 plants · hm-2 under medium-high water and fertilizer conditions.