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Response to Fertilization Associated to Leaf Mineral Content in Strawberry

Author:
Agüero, Juan José, Kirschbaum, Daniel Santiago
Source:
Journal of plant nutrition 2015 v.38 no.1 pp. 116-126
ISSN:
1532-4087
Subject:
calcium, calcium oxide, field experimentation, flowering, genotype, harvesting, leaf area, leaves, magnesium oxide, mineral content, nitrogen, nutrients, phosphorus pentoxide, potassium, strawberries
Abstract:
Leaf mineral content along the crop cycle may explain differences in response to fertilization among strawberry genotypes. A two year field experiment was conducted using responsive (‘Camarosa’, ‘Ventana’) and nonresponsive (‘Camino Real’, ‘Candonga’) to fertilization genotypes under proportional increases in nutrients supply: from a control dose “C” [120 kg nitrogen (N) ha ⁻¹, 70 kg phosphorus pentoxide (P ₂O ₅) ha ⁻¹, 220 kg potassium oxide (K ₂O) ha ⁻¹, 40 kg calcium oxide (CaO) ha ⁻¹ and 20 kg magnesium oxide (MgO) ha ⁻¹] to “1.33C” and “1.66C” in 2007 and to “1.5C” and “2C” in 2008. Response to fertilization was high (45–120%) at begining of harvesting and low (10-28%) at middle and end of harvesting. Correlation between leaf area and total yields was high (r ≈ 0.73) at begining of harvesting, except on ‘Camino Real’ (late and compact genotype). At begining of flowering and harvesting, responsive genotypes showed higher potassium (K) and lower calcium (Ca) leaf contents than nonresponsive genotypes, accentuated with the fertilization increase.
Agid:
1224239