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以辽宁省主栽玉米品种丹玉405为试验材料,研究不同种植形式与密度对其产量及光合特性的影响。结果表明,以2比空5.70万株/hm2密度种植,产量达到最高,为15 523.8kg/hm2;其次是4比空5.70万株/hm2密度种植,产量为13 776.3kg/hm2。叶向值在4比空4.20万株/hm2密度种植和2比空4.95万株/hm2密度种植的条件下达到较高。叶面积指数和净光合速率随种植密度的增加呈升高趋势,但均在2比空5.70万株/hm2密度种植条件下达到最高值。说明丹玉405采用2比空或4比空5.70万株/hm2密度种植有利于改善群体结构、增加通风透光、提高光能利用率,获得较高经济产量。
The main maize variety Danyu 405 in Liaoning Province was used as experimental material to study the effects of different planting forms and densities on its yield and photosynthetic characteristics. The results showed that the yield was 57 523.8 kg / hm 2 at the density of 5700 plants / hm 2 at 2 headspace, followed by the planting density of 5700 plants / hm 2 at 4 ratios, with the yield of 13 776.3 kg / hm 2. The value of leaf height was higher under the conditions of 4 200 mn / hm2 density planting and 2 mossy 49,500 / hm2 density planting. Leaf area index and net photosynthetic rate increased with the increase of planting density, but all reached the highest value at the density of 5700 plants / hm2 under 2-emptying. Explain Dan Yu 405 with 2 or 4 empty space ratio of 5.70 million / hm2 planting density is conducive to improving the population structure, increase ventilation and light, improve light utilization, access to higher economic output.