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Growth, yield and yield components of dry bean as influenced by phosphorus in a tropical acid soil

Author:
Fageria, N. K., Baligar, V. C.
Source:
Journal of plant nutrition 2016 v.39 no.4 pp. 562-568
ISSN:
1532-4087
Subject:
Inceptisols, Phaseolus vulgaris, acid soils, dry beans, equations, fertilizer application, grain yield, greenhouse experimentation, nutrient use efficiency, phosphorus, phosphorus fertilizers, plant growth, pods, soil nutrients, soil-plant interactions, tropical and subtropical crops, tropical soils, yield components
Abstract:
Phosphorus (P) deficiency is one of the most yield limiting factors for dry bean (Phaseolus vulgaris) production in tropical acid soils. Dry beans are invariably grown as mono-crops or as inter-crops under the perennial tropical crops. Information is limited regarding the influence of phosphorus fertilization on dry bean yield and yield components and P use efficiency in tropical acid soils. A greenhouse experiment was conducted to evaluate the influence of phosphorus fertilization on dry bean growth, yield and yield components and P uptake parameters. Phosphorus rates used were 0, 50, 100, 150, 200, and 250 mg P kg ⁻¹ of soil. Soil used in the experiment was an acidic Inceptisol. Grain yield, shoot dry weight, number of pods, and 100 grain weight were significantly (P < 0.01) increased with phosphorus fertilization. Maximum grain yield, shoot dry matter, number of pods, and 100 grain weight were obtained with the application of 165, 216, 162, and 160 mg P kg ⁻¹ of soil, respectively, as calculated by regression equations. Grain yield was significantly and positively associated with shoot dry weight, number of pods, P concentration in grain and total uptake of P in shoot and grain. Phosphorus use efficiency defined in several ways, decreased with increasing P rates from 50 to 250 mg P kg ⁻¹ of soil. Maximum grain yield was obtained at 82 mg kg ⁻¹ of Mehlich 1 extractable soil P. Results suggest that dry bean yield in Brazilian Inceptisols could be significantly increased with the use of adequate rates of phosphorus fertilization.
Agid:
63009
Handle:
10113/63009