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四密25是优质高产适应性较强的玉米品种,虽创造出吉林省东部半山区15000kg/hm2的高产记录,但产量波动(7500～15000kg/hm2)较大。为进一步研究其高产稳产的构成因素,1994-2004年,在吉林省东部半山区桦甸市5个乡镇,应用四密25分别进行了品种比较、高产攻关、覆膜种植与裸地种植、不同施肥量、施肥方法、播种方法、播种时期、不同密度及等离子体处理种子的剂量、次数、播种期、化肥利用率的试验。通过对上述各项试验的194份材料统计分析,明确了四密25构成产量模型的3个主导因素为千粒重、穗粒数、公顷穗数。根据回归分析理论,计算出产量与3个主导因素之间的模型,为今后吉林省东部半山区四密25高产稳产提供理论依据。
Si25 is a maize variety with high adaptability and high yield. Although it has produced a high-yield record of 15000kg / hm2 in the mid-mountainous area of eastern Jilin Province, the yield fluctuation (7500-15000kg / hm2) is relatively large. In order to further study the components of high and stable yield, in 1994-2004, five townships in Huadian, a mountainous area in the eastern half of Jilin Province, were used to compare the varieties, high yield, planted with bare land, Fertilization rate, fertilization method, sowing method, sowing time, different density and plasma treatment of seed dosage, frequency, sowing time, fertilizer utilization rate of the experiment. Based on the statistical analysis of 194 materials in the above experiments, it is clear that the three dominant factors that Siq25 makes up the yield model are the 1000-grain weight, the number of grains per ear and the number of ears per hectare. According to the regression analysis theory, the model between the yield and the three dominant factors is calculated, which provides a theoretical basis for the high and stable yield of the four-density25 in the Mid-mountainous area of the eastern part of Jilin Province in the future.