不同种植密度对秋马铃薯生长及产质量的影响

Effect of Different Plant Densities on the Growth,Yield and Quality of Autumn Potato

为提高秋马铃薯产量,降低种薯成本,以华薯1号、兴佳2号为供试品种,研究不同种植密度对秋马铃薯的生长及产质量的影响。结果表明:种植密度对2个马铃薯品种的茎粗、SPAD值、主茎数、产量和单株结薯数影响显著,对块茎品质影响不显著;其中,茎粗和SPAD值随种植密度增加呈下降趋势,株高和主茎数随种植密度增加呈上升趋势;不同品种的适宜种植密度不同,华薯1号种植密度为4100株/667m^(2)时产量最高,为1947.98 kg/667m^(2),而兴佳2号的种植密度为5100株/667m^(2)时产量最高,为1537.52 kg/667m^(2)。

In order to increase the yield of autumn potatoes and reduce the cost of seed potatoes,Huashu No.1 and Xingjia No.2 were used as experimental materials to study the effects of different plant densities on the growth,yield and quality of autumn potatoes in this paper.The results showed that the plant densities had significant effects on the stem diameter,main stem number,leaf SPAD value,yield and tuber number per plant of the two varieties,but had no significant effect on the tuber quality.The stem diameter and leaf SPAD decreased with the increase of plant density,while the number of main stems and plant height presented an upward trend with the increase of plant density.The optimal plant density varied among potato varieties.Huashu No.1 generated the highest yield of 29 219.7 kg/hm^(2) when planted at the density of 61 500 plants/hm^(2),while Xingjia No.2 produced the highest yield of 23 062.8 kg/hm^(2) at the plant density of 76 500 plants/hm^(2).