Growth Yield and Yield Components of Cotton as Influenced By NPK Ratios in Combination of Foliar Application of Zinc Levels under Tandojam Conditions

摘要

The performance of Cotton (Gossypium hirsutum L.) was evaluated using various NPK ratios + foliar application of zinc levels at Agriculture chemistry Section (Soils), Agriculture Research Institute, Tandojam, Pakistan during kharif 2013. The experiment was laid out in randomized complete block design (RCBD) with four replications. Five NPK ratios with combination of five foliar applications of zinc levels T1 = 140-80-60 + 0% Zn (foliar applied zinc zero time), T2 = 140-80-60 + 2% Zn (foliar applied zinc one time), T3 = 140-80-60 + 2% Zn (foliar applied zinc two time), T4 = 100-60-40 + 2% Zn (foliar applied zinc three time), T5 = 100-60-40 + 2% Zn (foliar applied zinc four time) were used. Five NPK ratios with combination of five foliar applications of zinc levels were found significant for all mentioned parameters. Plots treated with NPK ratio 100-60-40 kg ha-1 + 2% four times foliar application of zinc produced maximum plant height (142 cm), sympodial branches plant-1 (27), productive bolls plant-1(34), staple length (31.75 mm), seed weight plant-1 (109 g), ginning out turn (G.O.T) (37.26%) and seed yield (3189 kg ha-1) as compared with NPK ratio @ 140-80-60 kg ha-1 + 0% foliar application of zinc. It was concluded from this study that sowing of cotton with NPK ratio @ 100-60-40 kg ha-1 + 2% four times foliar application of zinc seems to the best choice for cotton producer in the agro-climatic condition of Tandojam.