吉林省东部半山区“四密25”玉米产量构成因素的浅析

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。

Analysis on the Yield Constitution Factors of Simi25 in the East of Jilin Province

Simi25 is a maize variety with high yield, high quality and good adaptability. It had created the highest record in the yield of 15000 kg/hm2 in the east of Jilin province, but its yield fluctuated between in the range of 7500 kg/hm2 and 15000 kg/hm2.To further study the high and steady yield constitution factors, the variety was experimented in a dozen methods in Huadian, the east of Jilin Province from 1994 to 2004. Experiments included variety comparison, fertilizer use, seedtime, density, treat of plasma and so on.194 shares materials were statistic analyzed and its result specified that three dominant constitutions of Simi25 yield model are 1000-grains weight, grains number per ear and ears number per hectare. By regression analysis, model between yield and three dominant factors was calculated, which will offer theory reference for the high and steady yield of Simi25 in the east of Jilin province.