Study on the Effect of Different Density on the Yield of'Shangshu 19'Sweet Potato Horizontally Planted at Counterpoint in Double Row on Wide Ridge
To further explore the yield potential of sweet potato,this study adopted a method called"horizontally planting at counterpoint in double rows on wide ridge",combining agricultural machinery and agronomy and took'Shangshu 19'as test object.5 density treatments were set up to inves-tigate the effects of different densities on the yield of'Shangshu 19'.The results showed that yield of'Shangshu 19'reached a highest level(49 986.11 kg/hm2)when the plant density was 56 667 plants/hm2.In this density,the number and yield of large sweet potato were the highest and the medium ones were the second,but the ratio of large ones,the ratio of medium ones and the average weight of large ones were lower.The results suggested that the effect of density on the yield of sweet potato was mainly realized by increasing the quantity and yield of large and medium sweet po-tato,but had little relationship with the ratio of large and medium ones.The size difference of sweet potatoes narrows and the number and yield of me-dium sweet potato began to dominate since the density was over 56 667 plants/hm2.This study found the best planting density for horizontally planting at counterpoint in double rows on wide ridge and provided an idea to product sweet potatoes with moderate shape to meet fresh food demand.
horizontally planting at counterpoint in double rows on wide ridge'Shangshu 19'sweet potatodestinyyield
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