不同密度及施肥量对马铃薯新品种毕薯3号经济性状的影响

Effects of different planting density and fertilizer quantity on economic traits of new potato variety Bishu No.3

为了研究毕节农科所新育成的马铃薯品种毕薯3号的高产栽培技术配套措施,采用正交试验设计,研究不同密度及施肥量对毕薯3号主要农艺性状的影响。结果表明:密度、氮、磷、钾对毕薯3号小区产量影响从大到小为氮>密度>钾>磷,对单株块茎数影响从大到小为密度>钾>氮>磷,对单株块茎重影响从大到小为密度>氮>磷>钾,对商品薯率影响从大到小为密度>钾>氮>磷。当每667 m2种植4 667窝,每667 m2施纯N、P2O5、K2O量分别为6、3、6 kg时,最有利于毕薯3号经济性状的提高。

Abstract： In this paper, orthogonal experimental design 1.9（34） was adopted to investigate the effects of planting density and application amount of N, P and K on main agronomic traits of new potato variety Bishu No.3 breeded by Bijie Institute of Agricultural Sciences, to get high yield and quality planting technigue. The results showed that the effect order of all cultivation factors on yield was N〉density〉P〉K, the effect order of all cultivation factors on tuber number per plant was density〉K〉N〉P, the effect order of all cultivation factors on tuber weight per plant was density〉N〉P〉K, and the effect order of all cultivation factors on rate of economic potato was density〉K〉N〉P. The highest economic benefit of Bishu No.3 would be obtained under the cultivation conditions of 4 667 plants per 667 m2, 6 kg N, 3 kg P2O5 and 6 k2 K2O oer 667 m2.