高淀粉甘薯品种栽培模式及影响效应初探

Preliminary study on cultivation patterns and effect of high-starch sweet potato varieties

为了探索高淀粉甘薯[Ipomoea batatas(Linn.)Lamarck]品种的高产栽培模式,选取肥料种类、甘薯品种、种植密度、覆膜类型4个因素,采用随机区组正交试验设计,比较不同因素对茎叶产量、鲜薯产量、干物质率、T/R(蔓、薯鲜重比值)的影响。结果表明,组合A3B1C3D2,即施用复合肥、甘薯品种选用商薯19、覆盖黑膜、种植密度为59895株/hm2时的鲜薯产量最高。肥料种类以复合肥的茎叶产量、干物率及鲜薯产量最高;甘薯品种对茎叶产量及T/R影响效应最显著;覆膜能提高茎叶产量、干物率和鲜薯产量;种植密度对干物率影响最明显。

In order to explore the high yield cultivation mode of high starch sweet potato[Ipomoea batatas(Linn.)Lamarck],the effects of four factors including different fertilizers,sweet potato cultivars,planting densities and mulching types on vine yield,fresh root tuber production,dry matter rate and T/R value(ratio of fresh vine yield and fresh root tuber production)were studied by an orthogonal randomized test.The results showed that combination A3B1C3D2,that is,applying compound fertilizer,choosing Shangshu 19,covering black film,planting density of 59895/hm2,had the highest production of fresh root tuber.The vine yield,dry matter rate and fresh root tuber production of compound fertilizer was the highest;The effect of sweet potato cultivar on vine and T/R value was the most remarkable;Mulching can improve dry matter content and the production of haulm and tuber;And the effect of cultivation density on dry matter content was the highest.