播期和密度对谷子农艺性状及产量的影响

Effects of Sowing Date and Density on Agronomic Traits and Yield of Millet

为了探讨播期和密度对谷子农艺性状和产量的影响,试验以农大10号为研究对象,采用裂区试验设计,播期为主区,密度为副区,研究其对谷子农艺性状和产量的影响。结果表明,在不同播期和密度处理下,产量与穗数呈极显著正相关,相关系数为0.93,穗数与密度呈极显著正相关,相关系数为0.54,穗数随播期的推迟呈下降的趋势,主要是播期推迟影响植株分蘖,进而影响植株穗数。因此,早播和增密有利于提高谷子产量。以产量为目标性状与播期和密度进行回归分析,回归方程为:Y=-55547.13+886.29X1+385.51X2-3.37X12-2.86X22-1.39X1X2,对方程求极值得到在5月5日播种,密度控制在37.38万株/hm^(2)时,产量达到最高为6558.21 kg/hm^(2)。

To explore the effects of sowing date and density on grain yield of millet.This study used Nongda 10 as material and adopt split-plot,the sowing date as the main plot and the plant density as subplot,the effects of sowing date and plant density on agronomy characters and yield components were invested.The results show that:there was a significant post relationship between grain yield and the number of spikes,the correlation coefficient was 0.93.The number of spikes was positively correlated with the plant density,and the correlation of coefficient was 0.54.However,the number of spikes decreased with the delay of sowing date,which mainly affected the tillers and spikes of the plant.Therefore,early sowing and increasing density are beneficial to improve grain yield of millet.The re⁃gression equation of yield,sowing time and density was Y=-55547.13+886.29X1+385.51X2-3.37X12-2.86X22-1.39X1X2.Through finding the extreme value of the equation,we found that when sowing on May 5th and plant den⁃sity was 3.738×105 plants/ha,the grain yield of Nongda10 reached the maximum of 6558.21 kg/ha.