| Abstract: In order to explore the effect of different cultivation methods on the yield of purple sweet potato 'Nei 17-71' and explore the best cutting method and cultivation density, the effects of different cutting methods (3, 5, 7 sections of forward inserted and 3, 5, 7 sections of inverted inserted) and different cultivation densities (17, 20, 25, 33, 50 cm of planting distance) on the yield of vines-leaves and sweet potatoes 'Nei 17-71' were compared. The results showed that the yield per 667 m2 of vines-leaves increased with the increasing of cuttage sections under both forward and inverted inserted treatments, and the 5 sections and 7 sections of forward inserted were higher, which were 1 840.03 kg and 2 539.05 kg, respectively. The yield per 667 m2 of sweet potatoes with 5 cetions and 7 sections of forward inserted treatments were signifi cantly higher than that of other treatments, which were 1 840.92 and 1 987.66 kg, respectively. With the increasing of cultivation density, the yield per 667 m2 of vines-leaves and sweet potatoes increased fi rstly and then decreased, while the rate of large and medium sweet potatoes showed a trend of decrease. The yield of sweet potatoes treated with plant distance
of 25, 20, 17 cm was 1 967.65, 2 164.97, 2 045.47 kg per 667 m2
, respectively, which were signifi cantly higher
than that of other treatments. Considering the factors such as planting cost and market demand for large and
medium sweet potatoes, it was appropriate to cultivate purple sweet potato 'Nei 17-71' with 20-25 cm of plant
distance, 100 cm of row distance and 5-7 sections of forward inserted. |