Effect of Anti-Salinity On Growth, Yield and Fruit Quality of Le-Conte Pear (Pyrus Communis) Trees in New Valley

Abstract

This investigation was carried out during two successive seasons (2021 and 2022) on the 5 -year- old of ‘Le-Conte’ pears cultivar grown in a private orchard located at Farafra Oasis, New Valley governorate to study the effects of anti-salinity, foliar application treatments (Salicylic acid at 100ppm and 200ppm and Citric acid at 500ppm and 1000ppm) and soil application treatments (effective
microorganism 50ml and 75ml and humic acid 25ml and 50ml) and their interaction on growth, yield and fruit quality, of Le-Conte’ pear trees under heat stress conditions. The best results were recorded that citric acid at 1000 ppm with humic acid at 50 ml/tree recorded highest significant values where improved shoot height, shoot diameter, number of leaves per shoot, leaf area, chlorophyll a, chlorophyll b, total chlorophyll in leaf, carotenoids, fruit set %, number of fruit/tree, yield kg/ tree, yield (ton/feddan), fruit weight, fruit volume, fruit length, fruit diameter, fruit shape index, fruit firmness, T.S.S., T.S.S./acid ratio, total sugar, reducing suger , nun reducing sugar and (vitamin C). Leaf nitrogen, phosphorus, potassium, calcium, magnesium, iron, zinc and, sodium, chloride and proline and reduced acidity of fruit juce of Le-Conte’ pears trees under heat stress conditions.