甘薯新品种‘龙薯13号’高产栽培技术研究

Cultivation Optimization for New Sweet Potato Variety,‘Longshu 13'

为研究食用型甘薯品种‘龙薯13号’的配套高产栽培技术，采用正交试验方法，研究密度、栽插期、不同苗段和施肥量4个因素对‘龙薯13号’产量的影响，以期获得高产的最佳组合。试验结果表明：密度、栽插期、不同苗段对甘薯产量有极显著影响，施肥量对甘薯产量有显著影响，适当提高密度（40005-49995株·hm^-2）、提早栽插、采用茎蔓顶端苗和适当提高施用复合肥量（150-525 kg·hm^-2）都能提高甘薯的产量。在中等地力水平条件下，当栽插密度为49995株·hm^-2、7月18日栽插（生育期133 d）、采用顶端苗、施用进口复合肥525 kg·hm^-2是最佳组合，能取得比其他组合更高的甘薯产量。

For high yield cultivation of the edible sweet potatoes,‘Longshu 13’,an orthogonal experimentation was conducted.Yield affected by the planting density,transplanting time,vine cuttings and fertilization was investigated for the optimization.The results indicated that the planting density,transplanting time and vine cuttings had a very significant,while the fertilization a significant,effect on the yield of the sweet potatoes.The yield could be further improved by increasing the planting density from 40 005 to 49 995 plants ·hm^-2 ,planting early,using the top vines,or applying 150 to 525 kg·hm^-2 of compound fertilizer.On soils of moderate fertility,the sweet potatoes could attain a high yield with the optimized conditions of a planting density of 49 995 plants·hm^-2 ,planting on July 18 （with a growth period of 133 days）,using the top of vines for transplant,and applying a composite fertilizer at the rate of 525 kg·hm^-2 .