The effect of superphosphate and plant density on mini-tuber production from True Potato Seed (TPS)
Improving tuber seed quality and availability is institutionally complex in the tropics and sub-tropics. This experiment was carried out at Africa University farm, Zimbabwe. The main objective of this work was to evaluate the effect of superphosphate and plant density on mini-tuber production from true potato seed. The enhancement of all growth variables was due to P availability in the soil allowing plants to develop without restrictions as rates increased. Days to maturity, shoot P, tuber dry matter, shoot dry matter and specific gravity showed significant responses to superphosphate. This showed that phosphorus plays an important role in growth and development of the mini-tubers. Differences in the parameters measured as affected by increasing P rates were mainly between the lowest and the highest P treatments, suggesting that at lower rates of phosphate application, the nutrient was insufficient. Phosphorus showed significant yield increases with increase in application rates. Yield also increased significantly by weight with decreased planting spacings adopted.
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Keywords: Solanum tuberosum L, seedling tuber, phosphorus, nursery, yield.
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