不同密度对马铃薯‘陇薯9号’农艺性状及产量的影响

The Effects of Different Density on Agronomic Characters and Yield of ‘Longshu9’

在大田试验条件下设6.0万、6.75万、7.5万、8.25万、9.0万株/hm^25个密度处理,研究不同密度对淀粉加工型马铃薯新品种陇薯9号农艺性状及产量的影响。结果表明:随着密度的增加,植株高度和单株主茎数呈增高趋势、主茎粗呈下降趋势。不同密度对马铃薯单株薯块数、单株产量和商品薯率有一定影响,而对淀粉含量影响不明显。陇薯9号在张掖市种植的最佳密度为7.5万株/hm^2,在此密度下平均产量达62674.4kg/hm^2,单株结薯数达到7.7个,单株产量0.98 kg。

The field experiment was carried out to study the effects of different density （60,67.5,75,82.5,90 thousand plants/ha） on agronomic characters and yield of starch processing potato ＇ Longshu9 . The results showed that with the increase of density the plant height and main stem number showed an increasing trend, but the main stem diameter was a descending trend. The different density had some influence on tuber set per plant, yield per plant and marketable potato percentage, but had no obvious influence on starch content. The optimum density of＇ Longshu9was 75 thousand plants/ha in Zhangye city, and the average tuber yield reached 62674.4kg/ha, tu- ber set per plant was 7.7, yield per plant was 0.98 kg.