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Interactive effect of nitrogen and paclobutrazol on annually pruned Sammar Bahisht Chaunsa

Abdul Ghafar Grewal, Muhammad Shahzad Zafar, Maqbool Ahmad, Atif Iqbal, Abid Hameed Khan, Ghulam Mustafa, Samad Raza and Niaz Ahmed

There is evidence that vegetative growth is limited in many cultivars of mango grown under subtropical regions reducing their flowering tendency that ultimately results in low productivity. Prolonged use of certain growth retardants commonly used to manage vegetative and reproductive growth in the mango crop, such as Paclobutrazol (PBZ) has been associated with deleterious effects on plant growth. The present 13-years study was aimed at investigating the effects of integrated use of nitrogen and PBZ on vegetative growth, flowering pattern and fruit yield of annually pruned mango cv. Sammar Bahisht Chaunsa. Twenty five years old trees were used in the study. The experiment was laid out according to a randomized complete block design (RCBD) with nine treatments and five replications keeping two plants as the experimental unit. Different concentrations of nitrogen and Paclobutrazol (PBZ) alone and in combination were evaluated. Data were collected for consecutive 13 years based on vegetative growth and reproductive behaviour. Optimum postharvest vegetative growth, maximum flowering terminals and the highest fruit yield were obtained from the trees treated with 1 Kg of nitrogen annually. The use of PBZ, alone or in combination with nitrogen, helped boosting up fruit yield during the initial five years of investigation but later on resulted in reduced yield and gradual mortality of mango trees

To Cite this article: Grewal, A.G., M.S. Zafar, M. Ahmad, A. Iqbal, A.H. Khan, G. Mustafa, S. Raza and N. Ahmed. 2023. Interactive effect of nitrogen and paclobutrazol on annually pruned Sammar Bahisht Chaunsa. Pak. J. Bot., 55(6): DOI:  

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