Physiological and biometric indices in bean under different doses of phosphorus

Made available in DSpace on 2013-09-27T14:53:17Z (GMT). No. of bitstreams: 1 WOS000288225800022.pdf: 1219636 bytes, checksum: 94088a90a70dc90d123ad326ea9a3142 (MD5) Previous issue date: 2010-01-01 Made available in DSpace on 2013-09-30T17:48:00Z (GMT). No. of bitstreams: 1 WOS000288225800022.pdf: 1219636 bytes, checksum: 94088a90a70dc90d123ad326ea9a3142 (MD5) Previous issue date: 2010-01-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:21:06Z No. of bitstreams: 1 WOS000288225800022.pdf: 1219636 bytes, checksum: 94088a90a70dc90d123ad326ea9a3142 (MD5) Made available in DSpace on 2014-05-20T13:21:06Z (GMT). No. of bitstreams: 1 WOS000288225800022.pdf: 1219636 bytes, checksum: 94088a90a70dc90d123ad326ea9a3142 (MD5) Previous issue date: 2010-01-01 The study had the objective of evaluate the growth of bean cultivar Carioca early cultivated during the rainy season under different doses of phosphorus applied to soil. We adopted the experimental design at random blocks, evaluating six doses of phosphorus (0, 30, 60, 90, 120 and 150 kg P(2)O(5) ha(-1)), relying in the form of superphosphate triple, with five replicates. Biometric indices were evaluated leaf area (cm(2) plant(-1)) and dry matter (g seedling(-1)). Physiological indices of crop growth rate (CGR, g m(-2) day(-1)), relative growth rate (RGR, g g(-1) day(-1)), net assimilation rate (NAR, g m(-2) day(-1)), leaf area ratio (LAR, cm(2) g(-1)) and specific leaf area (SLA, cm(2) g(-1)) were obtained through analysis of functional growth. The data from the biometric indices were submitted to analysis of variance, with subsequent construction of regression models. The dry matter and leaf area of bean Carioca Early increase linearly with increasing doses of applied phosphorus in the soil. The dry matter has increased constantly throughout the cycle, and the leaf area indices reach its maximum at 52 days after emergence (DAE). The restriction of phosphorus reduces the Relative Growth Rate at the beginning of the development and lengthen the physiological cycle of bean cultivar Carioca early. Universidade Estadual de Londrina (UEL), Depto Agron, BR-86051990 Londrina, PR, Brazil APTA Reg Sudoeste Paulista, Capao Bonito, SP, Brazil Universidade Estadual de Londrina (UEL), Programa Posgrad Agron, BR-86051990 Londrina, PR, Brazil UNESP, Fac Ciencias Agron, Dept Agr & Melhoramento Vegetal, Botucatu, SP, Brazil UNESP, Fac Ciencias Agron, Dept Agr & Melhoramento Vegetal, Botucatu, SP, Brazil