优质甘薯广薯87品种特性及其高产栽培农艺措施

广薯87丰产性较好、适应性广、干物率与淀粉率较高、蒸煮食用品质优,2009年通过福建省品种审定,已在生产上大面积推广应用。在分析广薯87品种特性的基础上,采用二次通用旋转组合设计研究不同种植密度及施肥量(N、P、K)对广薯87鲜薯产量的影响,结果表明各因子对产量的影响程度为:密度(X1)>钾肥(X4)>氮肥(X2)>磷肥(X3)。计算机模拟寻优,鲜薯产量达47 864.03kg.hm-2以上的最优农艺措施是:种植密度5.51万～5.73万株.hm-2,施尿素264.34～283.58kg.hm-2、过磷酸钙423.45～476.55kg.hm-2、硫酸钾414.15～458.25kg.hm-2。

Characteristic and Measures for High Yield Cultivation of Sweet Potato Cultivar Guangshu 87 with Good Quality

With its desirable properties of high yield,wide adaptability,high dry matter and starch contents,as well as good cooking and eating quality,Guangshu 87 was certified and released for commercial production in Fujian in 2009.It has been since then widely used in commercial production.Based on the yield factors(i.e.,planting density and fertilization rate),cultivation of Guangshu 87 was studied and optimized by using the rotational regression analysis.The results showed that the cultivation measures affecting the yield included and ranked in the order of planting density(X1)> k fertilization(X4)> N fertilization(X2)> P fertilization(X3).Optimization by computer showed that the model that gave the highest yield of 47 864.03 kg.hm-2 could be achieved by planting at a density ranging from 55 100-57 300 plants·hm-2 and applying urea at 264.34-283.58 kg·hm-2,calcium superphosphate at 423.45-476.55 kg·hm-2 and potassium sulfate at 414.15-458.25 kg·hm-2.