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选取东农253为试验材料,研究化控剂玉黄金(主要成分为胺鲜酯和乙烯利)对不同种植密度(设置5、6、7和8万株·hm-24个种植密度)下玉米穗部性状及抗倒伏性能影响。结果表明,化控条件下,7万株·hm-2密度种植下玉米获得最高产量达13 290.95 kg·hm-2。穗长、百粒重、行粒数易受环境影响,变异系数较大,穗长对产量影响最大,其次为粒重;玉黄金能缩短节间长度、降低株高和穗位,提高抗倒伏性能;玉黄金处理后明显改善茎部性状,增强玉米抗倒性能,茎秆性状优化有利于营养物质和水分向地上部运输,提高茎秆对穗部性状和籽粒产量贡献率。
In this experiment, Dongnong 253 was selected as experimental material to study the effects of chemical control agent jade gold (the main components of amylose and ethephon) on the growth of corn under different planting densities (5, 6, 7 and 80 000 hm-24 planting densities) Ear Characters and Lodging Resistance. The results showed that under the condition of chemical control, the highest yield of 13 290.95 kg · hm-2 was obtained under 70 000 hm-2 planting density. Spike length, 100-grain weight, line grain number were easily influenced by environment, and the coefficient of variation was large. Spike length had the greatest effect on grain yield, followed by grain weight. Jade gold could shorten the internode length, reduce plant height and ear position, Performance; jade gold treatment significantly improved stem traits, increased lodging resistance of corn, stem trait optimization is conducive to the transport of nutrients and water to shoots, improve the stems on the ear traits and grain yield contribution rate.