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以郑单958为试验材料,设置两个种植密度(82 500、97 500株/hm2)、5个行距配置(60+60、70+50、80+40、90+30、100+20 cm)和4种不同留苗的株距配置(单株、单双、双株、三株)方式,研究高密度条件下株行距配置对玉米产量及灌浆特性的影响。结果表明,两个密度条件下均以80+40行距、双株留苗处理产量最高,密度增加,增产效果更好。宽窄行配置增加了穗行数和穗粗,减小秃尖长,双株留苗增加玉米穗粒数和千粒重;80+40行距配置、双株留苗处理改变了玉米后期的灌浆特性,增加渐增期持续时间和累积子粒量,增大了平均灌浆速率。因此,在豫西地区高密度种植条件下,采用80+40的种植行距,通过双株留苗扩大株距,有利于玉米高密度群体植株的生长和最终产量的提高。
Taking Zhengdan 958 as experimental material, two planting densities (82 500,97 500 plants / hm2) and five row spacing configurations (60 + 60,70 + 50,80 + 40,90 + 30,100 + 20 cm) And four different seedling spacing allocation (single plant, single double, double strain, three strains) approach to study the row spacing under high-density configuration of corn yield and grain filling characteristics. The results showed that under the two density conditions, the row spacing of 80 + 40 was the highest. The arrangement of width and width increased the number of ear rows and ear diameter, decreased the length of bald tip, and double strain of seedlings increased the number of kernels and 1000-grain weight of maize seedlings. The arrangement of 80 + Increasing the duration and cumulative grain size, increasing the average filling rate. Therefore, under the conditions of high-density planting in western Henan, the planting spacing of 80 + 40 and the extension of plant spacing by means of double-stranded seedling were favorable for the growth and final yield of high density population of maize.