Acid phosphatase activity and leaf phosphorus content in soybean cultivars

Scientia Agricola

Roberto Wagner Cavalcanti Raposo²  Takashi Muraoka¹  Luiz Carlos Basso¹  José Lavres Jr.¹  Vinicius Ide Franzini¹ 

[1] ,UFPB CCA Depto. de Solos e Engenharia RuralAreia PB ,Brasil

关键词: enzymatic activity;    diagnostic-leaf;    maturation group;    atividade enzimática;    folha diagnóstico;    ciclos de maturação;   

DOI  :  10.1590/S0103-90162004000400014

来源: SciELO

【 摘 要 】

The phosphate fertilization represents the most costly fraction of soybean crop production. Efficient soybean cultivars for P absorption and utilization in soils of medium available P are highly desirable and might contribute for increasing crop production potential. Thirty two soybean [Glycine max (L.) Merr.] cultivars recommended for 'Cerrado' and differing in growth cycle (early, semi-early, semi-late, and late) were grown in a dystrophic Typic Haplustox Cerrado soil to evaluate the acid phosphatase activity, P content in the diagnostic leaf, and shoot biomass. There were differences among the soybean cultivars within all maturation groups in acid phosphatase activity and shoot biomass. The diagnostic-leaf P-content showed significant differences on semi-late and late maturation groups' cultivars. The acid phosphatase activity correlated positively with the plant shoot biomass from semi-early (r = 0.46) and late (r = 0.47) cultivars, and negatively (r = -0.40) with the P content in the diagnostic leaf of late maturation cultivars. The occurrence of soybean cultivars with high and low acid phosphatase activity within the same maturation groups indicates the existence of different mechanisms involving P mobilization in the soil and internal plant P remobilization.

【 授权许可】

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