【摘要】 研究了不同种植密度对谷子邯谷2号农艺性状及产量的影响。以邯谷2号为试材,采用随机区组设计,共设置6个密度处理水平,分别为45万、60万、67.5万、75万、90万、105万株·hm^-2,分析了邯谷2号的农艺性状和经济性状。结果表明,随着密度水平的增大,谷子的株高、生育期呈逐渐增大的趋势,茎粗、穗长、穗粗、植株干重、成穗率、单穗重、穗粒重、出谷率和千粒重均呈逐渐减小趋势,处理间差异显著。谷子产量随密度水平的增大呈先升高后降低,当密度为67.5万株·hm^-2时,产量达最大值5 720.67 kg·hm^-2。通过曲线估计得到的二次曲线方程y=-0.6915x²+98.194x+2 194.014能够有效模拟邯谷2号的种植密度与产量的关系,当x=71,即谷子密度为71万株·hm^-2时,邯谷2号可获得理论产量最大值为5 679.94 kg·hm^-2,与实测适宜密度基本一致。因此,邯谷2号最佳种植密度范围为60万～90万株·hm^-2。更多还原

【Abstract】 The effects of different planting densities on agronomic traits and yield of foxtail millet variety ‘Hangu 2’ were studied. With ‘Hangu 2’ as experiment material, the random area group design was used, and 6 density treatments, including 0.45 million, 0.60 million, 0.675 million, 0.75 million, 0.90 million, 1.05 million plants·hm^-2, were set to analyze its agronomic traits and economic traits. The results showed that with the increase of planting density, the plant height and growth date increased, while stem diameter, spike length, spike diameter, plant dry weight, spike rate, spike weight, grains weight per spike, percentage of grain weight and thousand grain weight decreased. The difference between treatments was significant. The yield of foxtail millet first increased and then decreased with the increase of density. When the density was 675,000 plants·hm^-2, the yield reached a maximum of 5 720.67 kg·hm^-2. The quadratic equation y =-0.6915 x²+98.194 x+2194.014 obtained by curve simulation was the optimal model to describe the relationship between the density and yield of ‘Hangu 2’. When the density was 710,000 plants·hm^-2, the maximum theoretical yield of ‘Hangu 2’ was 5679.94 kg·hm^-2, which was basically consistent with the actual measurement of the appropriate density. Therefore, the optimal planting density of ‘Hangu 2’ is 600,000 ～ 900,000 plants·hm^-2.更多还原