密度对面条专用型小麦品种宁春35号的产量影响

目的]探究优质专用型小麦品种产量潜力的发挥,为大面积推广,实现优质高产高效提供技术指导。方法]在中等肥力水平下,设450万、525万、600万、675万、750万粒/hm25个密度处理,研究密度对面条型小麦品种宁春35号产量的影响。结果]不同密度处理下,宁春35号各阶段发育进程和株高的遗传性相对稳定;除450万粒/hm2处理外,其他处理结实小穗数随密度增加而下降;有效穗数随密度增大而增加,穗粒数、穗粒重和千粒重随密度的增加而下降;450万粒/hm2处理的千粒重最高36.8g,产量也最高,为5965.5kg/hm2,密度为600万粒/hm2的产量次之,其余处理随密度的增加产量呈下降的趋势。结论]中等肥力水平下,宁春35号较为理想的密度是450万～600万粒/hm2,有利于提高群体和个体质量,夺取高产。

Effects of Density on the Yield of Noodle Wheat Variety Ningchun 35

Objective] The aim of the research was to play the yield potential of special wheat varieties with good quality and provide technical guidance for realizing the production with high quality,high yield and high efficiency in a large area.Method] Under the condition of middle fertility,5 density treatments of 4 500,5 250,6 000,6 750,7 500 thousands grains per hm2 were set up to study the effects of density on the yield of noodle wheat variety Ningchun 35.Result] In different density treatments,the developmental process in each stage and the heredity of plant height in Ningchun 35 were relatively stable.Except 4 500 thousands grains per hm2,sterile spiketlet number was decreased with the increase of density.Gained spike number per ha was increased with the increasing of density,and grains per spike,grain weight per spike and 1 000-grain weight were decreased with the increasing of density.1 000-grain weight in the density treatment of 4 500 thousand grains per hm2 was highest(36.8 g) and its yield was also highest(5 965.0 kg/hm2),the yield in the density treatment of 6 000 grains per hm2 was next,the yields in other treatments showed decreasing trends with the increasing of density.Conclusion] Under the condition of middle fertility,the more ideal density of Ningchun 35 was 4 500～6 000 thousands grains per hm2,which was propitious to the formation of large spikes and grain weight to acquire high yield.