Studies on influence of foliar application of nutrients on growth, yield and quality of guava (Psidium guajava L.) cv. L-49
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Date
2017
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CCSHAU
Abstract
The present investigations entitled “Studies on influence of foliar
application of nutrients on growth, yield and quality of guava (Psidium guajava L.) cv.
L-49”, was carried out on the four years old guava trees of cv. L-49, planted at a spacing of
6 m x 6 m in sandy laom soil at Experimental Orchard of Department of Horticulture,
Chaudhary Charan Singh Haryana Agricultural University, Hisar during the year 2016-17.
For the purpose of recording data, thirty nine uniform plants were selected and sprayed with
ZnSO4 (0.50, 0.75 and 1.00%), FeSO4 (0.2, 0.4 and 0.6%), K2SO4 (0.5, 1.0 and 1.5%) and
Urea (1.0, 1.5 and 2.0%), before flowering and after fruit set stage, during rainy and winter
season. Based on the overall quantitative and qualitative assessment of fruits, it can be
concluded that all the parameters were significantly influenced significantly with different
treatment except acidity, number of seeds and weight of 100 seeds. Maximum increment in
growth parameters i.e. plant height, plant spread, stem girth and average shoot length,
maximum number of flowers per branch, fruit set, number of fruits per plant, fruit weight,
volume of fruits, fruit size (length and breadth) and yield per tree were recorded in the trees
sprayed with ZnSO4 @1.00 per cent, along with minimum number of days taken for fruit set,
fruit drop and number of days for fruit maturity. However, maximum value of ascorbic acid,
total sugars and non-reducing sugars were recorded under K2SO4 @1.5 per cent, during both
the seasons of investigation. TSS was recorded maximum in the fruits picked from the trees
sprayed with K2SO4 @1.5 per cent, during rainy season, while with K2SO4 @1.0 per cent,
during winter season. Reducing sugars was recorded maximum under K2SO4 @1.00 per cent
and K2SO4 @1.5 per cent, during rainy and winter season, respectively. However, effect on
acidity, number of seeds per fruit and weight of 100 seeds per fruit was non-significant in
both the seasons. Maximum N content in leaf was obtained with Urea @2 per cent, P and K
content were obtained with K₂SO₄ @1.5 per cent, Zn content was obtained with the spray of
ZnSO₄ @1.00 per cent and Fe content was obtained with the spray of FeSO4 @0.6 per cent.
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