Articles
Effect of different approaches to soil surface maintenance on the content of leaf pigments and essential nutrients in apricot
Article number
1449_51
Pages
379 – 386
Language
English
Abstract
The study was carried out in 2020-2022 in a young apricot orchard established on the territory of the Fruit Growing Institute – Plovdiv.
The aim of study was to investigate the effect of different weed management approaches on the content of leaf pigments and essential nutrients in the leaves of the apricot ‘Goldrich’ cultivar.
The following variants of soil surface maintenance were studied: soil application of flumioxazin – Pledge 50 WP at two rates (200 and 400 g ha‑1); foliar application of the herbicide combination flumioxazin + quizalofop-ethyl – Pledge 50 WP (200 g ha‑1) + Targa Super 5 EC (2.0 L ha‑1); foliar treatment with glyphosate – NASA 360 EC (5.0 L ha‑1), twice during the growing season, at an interval of about 60 days; Mechanized tillage (disc harrow with deflection section); Control (unweeded, untreated). А tendency for higher values of content of chlorophyll a, b, and a+b were observed in the variants treated with Pledge 50 WP (200 g ha‑1) + Targa Super 5 EC (2.0 L ha‑1) and Pledge 50 WP (400 g ha‑1), regardless that differences were not statistically proven.
Chemical weed control favored the accumulation of larger amounts of N, P, K, and Mg in the leaves and the differences with the weed-infested control were statistically significant.
Those data showed no depressing effect of the applied herbicides and rates on the development and physiological status of the young apricot trees, which gives the reason to use them for controlled weed management in the first years after establishment of plantations.
The aim of study was to investigate the effect of different weed management approaches on the content of leaf pigments and essential nutrients in the leaves of the apricot ‘Goldrich’ cultivar.
The following variants of soil surface maintenance were studied: soil application of flumioxazin – Pledge 50 WP at two rates (200 and 400 g ha‑1); foliar application of the herbicide combination flumioxazin + quizalofop-ethyl – Pledge 50 WP (200 g ha‑1) + Targa Super 5 EC (2.0 L ha‑1); foliar treatment with glyphosate – NASA 360 EC (5.0 L ha‑1), twice during the growing season, at an interval of about 60 days; Mechanized tillage (disc harrow with deflection section); Control (unweeded, untreated). А tendency for higher values of content of chlorophyll a, b, and a+b were observed in the variants treated with Pledge 50 WP (200 g ha‑1) + Targa Super 5 EC (2.0 L ha‑1) and Pledge 50 WP (400 g ha‑1), regardless that differences were not statistically proven.
Chemical weed control favored the accumulation of larger amounts of N, P, K, and Mg in the leaves and the differences with the weed-infested control were statistically significant.
Those data showed no depressing effect of the applied herbicides and rates on the development and physiological status of the young apricot trees, which gives the reason to use them for controlled weed management in the first years after establishment of plantations.
Publication
Authors
Z. Rankova, I. Staneva, V. Akova
Keywords
herbicides, chlorophyll a, chlorophyll b, chlorophyll a+b, mineral nutrients
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