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[目的]对3个紫色甘薯品种渝紫43、渝紫263和万紫56进行肥料、密度试验,并初步比较3个紫色甘薯品种的产量关系,旨在得出最佳的栽培密度及施肥量,以便为重庆市紫色甘薯高产优质栽培提供理论依据。[方法]采用L9(34)正交试验设计,小区处理为:施肥(A),300kg/hm2-(A1)、600kg/hm2(A2)、900kg/hm2(A2);密度(B),45000株/hm2(B1)、60000株/hm2(B2)、75000株/hm2(B3);品种(C),万紫56(C1)、渝紫43(C2)、渝紫263(C3)。[结果]①密度对紫色甘薯产量的影响大于肥料对紫色甘薯产量的影响,即B>C;②密度对紫色甘薯产量的影响为K3>K1>K2;③肥料对紫色甘薯产量的影响为K1>K2>K3;④相同条件下三个紫色甘薯的产量表现为K1>K3>K2。[结论]在3个紫色甘薯品种中,万紫56产量最高,其次是渝紫263,最后是渝紫43。该试验最佳的栽培密度为每公顷为75000株,最合理的施肥量为每公顷300kg。
[Objective] The experiment aimed to test the fertility and density of three purple sweetpotato cultivars Yuzheng 43, Yuzai 263 and Wanziyu 56, and initially compared the yield relationships of three purple sweetpotato cultivars in order to get the best planting density and fertilizer In order to provide a theoretical basis for high-yielding and high-quality purple sweet potato cultivation in Chongqing. [Method] The orthogonal design of L9 (34) was used. The plot treatment was: fertilization (A), 300kg / hm2- (A1), 600kg / hm2 (A2), 900kg / hm2 Hm2 (B1), 60000 plants / hm2 (B2), 75000 plants / hm2 (B3); variety C, Wan purple 56 (C1), Yu purple 43 (C2), Yu Zi 263 (C3). [Result] ①The effect of density on purple sweet potato yield was greater than that of fertilizer on purple sweet potato yield, that is, B> C; ② The effect of density on purple sweet potato yield was K3> K1> K2; ③ The effect of fertilizer on purple sweet potato yield was K1 > K2> K3; ④The yield of three purple sweet potato under the same conditions showed K1> K3> K2. [Conclusion] The yield of Wanzi 56 was the highest among the three purple sweet potato cultivars, followed by Yuzhong 263 and finally Yuzai 43. The optimum cultivation density of this experiment was 75000 plants per hectare, and the most reasonable amount of fertilizer was 300kg per hectare.