Leaf Nutrient Status Vis-à-vis Fruit Yield and Quality of Sweet Orange (Citrus sinensis (L.) Osbeck)

Abstract

The present study was conducted to know the effect of leaf nutrient status on fruit yield and quality of sweet orange (Citrus sinensis (L.) Osbeck) in YSR district of Andhra Pradesh, India. In this investigation fifty sweet orange orchards aged between 12 to 13 years were selected and plant samples such as index leaves and matured fruits were collected from 10 per cent of plants in each orchard. Leaf Zn deficiency (62%) was the most severe among the 10 mineral elements tested and followed by Fe (54%), Mn (52%) and Cu (26%). Fruit yield showed significant positive correlation with leaf N (r =0.519**) and P (r =0.409**). Fruit weight had significant positive correlation with leaf Nitrogen (r = 0.469**), Phosphorus (r = 0.446**) and Potassium (r = 0.415**). Fruit juice percent was significantly and positively correlated with leaf N (r =0.353**) and P (r =0.364**). Titrable acidity had significant negative correlation with leaf Fe (r = -0.371**) and leaf Mn (r = -0.292*). Total Soluble Solids (TSS) showed a significant positive relation with leaf P (r = 0.438**) and significant negative correlation with leaf Mn (r = -0.311*). Vitamin C content of the sweet orange fruit had significant positive correlation with leaf N (r = 0.437**), P (r = 0.516**) and K (r = 0.398**).

A comparison of the mineral element content of 70 different varieties of pear fruit (Pyrus ussuriensis) in China

“…Factor analysis is an effective grouping method based on the correlation between variables that can show the high correlation between the same group of varieties. Although most mineral elements in fruits have positive correlations and synergistic effects, a few of them also have negative correlations and antagonistic effects ( Reddy et al, 2020 ; Yao, Xie & Zeng, 2017 ). This study also found this phenomenon.…”

Genetic Diversity and DNA Barcoding of Thrips in Bangladesh

“…According to a survey conducted by the Asian Vegetable Research and Development Center in Asia, aphids, moths, and thrips are the most common vegetable pests. Particularly, during dry weather conditions, thrips exhibit heightened multiplication rates, contributing to yield losses ranging from approximately 50% to 90% [45]. In Bangladesh, production per unit area is relatively low due to insect pests, which generally cause 30-40% losses and sometimes 100% losses if no control measures are taken.…”