种植密度对机播条件下红玫瑰马铃薯结薯性状及产量的影响

为确定临沂市机播条件下红玫瑰彩色马铃薯的最佳播种密度,开展了机播马铃薯相同行距(90 cm)、不同株距(14、18、22、26 cm)的密度试验,分析了不同密度处理对红玫瑰马铃薯出苗期、现蕾期、开花期、成熟期、株高、茎粗、主茎数、马铃薯晚疫病发病情况、产量、商品薯率的影响。结果表明:随着播种密度的增加,红玫瑰物候期无明显变化,株高、马铃薯晚疫病株数呈升高趋势,茎粗和主茎数呈降低趋势,商品薯率和商品薯产量呈下降趋势。以行距90 cm、株距22 cm密度下商品薯667 m~2产量最高,为2 129.25 kg,并且马铃薯晚疫病未见发生。

Effects of Planting Density on Tuber Traits and Yield of 'Red Rose' Potato under Condition of Mechanized Sowing

Abstract: In order to determine the best planting density of chronatic potato ''Red rose'' under the condition of mechanized sowing in Linyi city, the experiment of planting density was carried out with the same row spacing of 90 cm and different plant spacing (14 ,18, 22, 26 cm). The effects of different treatments on potato emergence stage, budding stage, flowering stage, maturity stage, plant height, stem diameter, main stem number, incidence of potato late blight, yield and commercial rate were analyzed. The results showed that with the increase of planting density, there were no effects on the phenological period of ''Red rose'', but the plant height and the number of potato late blight increased, the stem diameter and main stem number decreased, and the commercial potato rate and yield showed a downward trend. Under the density of 90 cm row spacing and 22 cm plant spacing, the commercial yield was the highest at 2 129.25 kg per 667 m2, and there was no occurrence of potato late blight.