Articles
Influence of different agrochemicals on calcium content in apple fruits of cultivar ‘Zhigulevskoye’
Article number
1327_25
Pages
189 – 196
Language
English
Abstract
Calcium supply is essential for the post-harvest life of apple fruits.
Calcium deficiency is often observed even on soils containing much calcium like chernozem.
The availability of calcium depends on soil and climatic factors, genetic characteristics of cultivar and rootstock, etc.
Various agrochemicals are applied as foliar fertilizers to increase the calcium content in apple fruits.
The efficiency of these applications for further fruit storage is mostly determined by the amount of fruit calcium, which depends on the number of treatments and active ingredients used.
In 2014 and 2015, we studied the effects of different numbers of sprays with calcium chloride, calcium nitrate, calcium nitrate + calcium chloride, amino acids + calcium chelate (14% CaO), calcium chelate complexes with carboxylic acids (in liquid form: 15% CaO and water-soluble powder: 30% CaO) in the experimental orchard of the I.V. Michurin Federal Scientific Centre (52.885451, 40.466336). The fruits were sampled for calcium analysis at harvest.
The experimental plots were sprayed 2, 6 and 10 times during the growing season.
We found that none of the studied agrochemicals provided a significant increase in the fruit calcium content with 2 or 6 treatments.
After ten treatments, all agrochemicals provided a substantial increase in fruit calcium.
With ten applications the first spray occurred during the flowering stage and it also increased fruitset.
The most significant effect was obtained by using liquid chelate calcium (15% CaO). Application of calcium nitrate (5 treatments) + calcium chloride (5 treatments) and chelated calcium with amino acids (14% CaO) also provided good yield and fruit quality.
Calcium deficiency is often observed even on soils containing much calcium like chernozem.
The availability of calcium depends on soil and climatic factors, genetic characteristics of cultivar and rootstock, etc.
Various agrochemicals are applied as foliar fertilizers to increase the calcium content in apple fruits.
The efficiency of these applications for further fruit storage is mostly determined by the amount of fruit calcium, which depends on the number of treatments and active ingredients used.
In 2014 and 2015, we studied the effects of different numbers of sprays with calcium chloride, calcium nitrate, calcium nitrate + calcium chloride, amino acids + calcium chelate (14% CaO), calcium chelate complexes with carboxylic acids (in liquid form: 15% CaO and water-soluble powder: 30% CaO) in the experimental orchard of the I.V. Michurin Federal Scientific Centre (52.885451, 40.466336). The fruits were sampled for calcium analysis at harvest.
The experimental plots were sprayed 2, 6 and 10 times during the growing season.
We found that none of the studied agrochemicals provided a significant increase in the fruit calcium content with 2 or 6 treatments.
After ten treatments, all agrochemicals provided a substantial increase in fruit calcium.
With ten applications the first spray occurred during the flowering stage and it also increased fruitset.
The most significant effect was obtained by using liquid chelate calcium (15% CaO). Application of calcium nitrate (5 treatments) + calcium chloride (5 treatments) and chelated calcium with amino acids (14% CaO) also provided good yield and fruit quality.
Authors
A.I. Kuzin, L.V. Grigoreva, A.M. Kochkina
Keywords
calcium, potassium, apple fruit calcium status, yield, foliar fertilizing, calcium-containing materials, K/Ca ratio, N/Ca ratio
Groups involved
- Division Plant Genetic Resources, Breeding and Biotechnology
- Division Tropical and Subtropical Fruit and Nuts
- Division Temperate Tree Fruits
- Division Vine and Berry Fruits
- Division Ornamental Plants
- Division Vegetables, Roots and Tubers
- Division Plant-Environment Interactions in Field Systems
- Division Greenhouse and Indoor Production Horticulture
- Division Postharvest and Quality Assurance
- Division Precision Horticulture and Engineering
- Division Horticulture for Human Health
- Division Temperate Tree Nuts
- Division Landscape and Urban Horticulture
- Division Sustaining Horticulture in a Changing World
- Working Group Humulus and Other Cannabaceae
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