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以糯玉米皖糯5号为试验材料,采用随机区组设计,在江淮地区研究密度对糯玉米产量、穗部性状和农艺性状等的影响,为江淮地区鲜食糯玉米合理密植提供理论依据。结果表明玉米产量随着密度增加呈先增后降变化趋势。2014年度以60 000株/hm~2时产量最高,但60 000和75 000株/hm~2处理玉米产量无显著差异;2015年度以75 000株/hm2处理玉米产量最高,且显著高于30 000和120 000株/hm~2处理的玉米产量。产量-密度关系符合等比型产量-密度关系的基本特征,2014年玉米产量y(kg/hm~2)与密度x(株/hm~2)方程为y=0.40591xe~((-0.0000135x)),最高产量密度范围为54 185~98 290株/hm~2;2015年玉米产量y(kg/hm~2)与密度x(株/hm~2)方程为y=0.43136xe~((-0.0000137x)),最高产量密度范围为52 494~98 238株/hm~2。随着种植密度增加,总体上玉米的穗位高、秃尖长、空秆率增加;穗粗、穗长、穗行数、鲜百粒重下降。江淮地区糯玉米的种植密度以52 494~54 185株/hm~2为宜。
Using waxy corn Wannuo 5 as experimental material, the effects of density on yield, ear traits and agronomic characters of waxy maize were studied in Jianghuai region by randomized block design. The results provided theoretical basis for rational close planting of fresh waxy corn in Jianghuai region. The results showed that the yield of maize increased first and then decreased with the increase of density. In 2014, the yield was the highest at 60 000 plants / hm 2, but there was no significant difference between 60 000 and 75 000 plants / hm 2 in maize. The output of corn with 75 000 plants / hm 2 was the highest in 2015 and significantly higher than 30 000 and 120 000 plants / hm ~ 2 maize production. The yield-density relationship is consistent with the basic characteristics of isopy yield-density relationship. The equation of y (kg / hm 2) and density x (plant / hm 2) in 2014 is y = 0.40591xe ~ ((- 0.0000135x ), And the highest yield density ranged from 54 185 to 98 290 plants / hm 2. The equation of y (kg / hm 2) and density x (plant / hm 2) in 2015 was y = 0.43136xe ~ ( -0.0000137x)), the highest yield density ranged from 52 494 to 98 238 plants / hm ~ 2. With the increase of planting density, the ear height, bald tip length and empty stalk rate of maize were increased in general. The ear diameter, ear length, number of ears per ear and weight per 100 kernel weight decreased. The planting density of waxy corn in Jianghuai region was 52 494 ~ 54 185 plants / hm ~ 2.