Effect of Pumice on Yield and Quality of Guava

Abstract

Effect of pumice on yield and quality of Guava cv. Sri thong were carried out by cultivating guava in sand culture using 50 liters pot size supplemented with about 2-3 liters of the nutrient solution every day.  There were four treatments i.e. Treatment 1) 0 kg of pumice per pot, Treatment 2) 1 kg of pumice per pot, Treatment 3) 3 kg of pumice per pot and devided to supply for twice times and Treatment 4) 5 kg of pumice per pot and devided to supply for three times.  The guava plants in all treatments were supplied with 2-3 liters of the nutrient solution every day.  The results showed that guava with pumice 5 kg/pot supplying gave better results in plant height, number of new branch, fruit weight and fruit size.  Vitamin C, chlorophyll, N,  Ca  and Mg contents in leaf and N, K and Ca contents in fruit were highly significant difference comparing with control treatment.  However, P and K contents in leaf and P and Mg contents in fruit were not significant differen among the treatments.  Guava supplied with 5 kg/pot had lowest total titratable acidity and total soluble solids.