Effect of algae extract and yeast application on growth, nutritional status, yield and fruit quality of Keitte mango trees

摘要

This experiment was carried out during 2008 and 2009 seasons on Keitte mango trees grown insandy soil under drip irrigation system in National Research Centre farm at El-Nobaria district, El-Behiera Governorate, Egypt. Experiment studied the effect of spraying trees with algae extract at (0.5, 1 and 2%) + yeast extract at (0.05, 0.1 and 0.2%) at full bloom stage on fruit set, fruit drop, fruitretention, tree yield, fruit quality and leaf mineral content. Results showed that spraying Keittemango trees once at full bloom with algae at 2% combined with yeast at 0.2% was very effective inimproving fruit set, fruit retention, yield as number of fruits or weight (kg) / tree and increased fruitlength (cm), fruit width (cm), fruit weight (g), pulp/fruit percentage and enhanced total soluble solids(T.S.S.). Moreover, it reduced fruit drop and weight of peel and seed (g) comparing with the control.This treatment improved nitrogen, potassium and boron contents in the leaves. On the other hand,all treatments had no effect on leaf phosphorus percentage.