Yield per plant and other characteristics of soybean plants treated with kinetin and potassium nitrate

Ciência e Agrotecnologia

Alexandre Martins Abdão Dos Passos²  Pedro Milanez De Rezende¹  Amauri Alves De Alvarenga¹  Danielle Pereira Baliza¹  Everson Reis Carvalho¹  Hélio Perez De Alcântara¹ 

[1],Empresa Brasileira de Pesquisa AgropecuáriaPorto Velho RO

关键词: Glycine max;    cytokinin;    plant growth substances;    plant nutrition;    Glycine max;    citocininas;    fitorreguladores;    nutrição mineral;   

DOI  :  10.1590/S1413-70542011000500014

来源: SciELO

【 摘 要 】

The study aimed to evaluate the effect of kinetin and potassium nitrate applied to leaves, at the R3 phenological phase, on some agronomic characteristics of soybean plants and their yield per plant in the field. The experiment was carried out in Itutinga, MG, using five kinetin concentrations (0, 250, 500, 750 and 1.000 mg kinetin ha-1) combined with four potassium nitrate concentrations (0, 5, 10 and 15 kg ha-1) in a factorial scheme using a randomized block experimental design, with three replications. The positioning of numbers of pods per plant was evaluated in three positions in the canopy: lower, middle and upper. The application of potassium nitrate did not influence the studied characteristics. Kinetin increased the total set pod number by 27.4% in contrast to the control, mainly in the lower and middle thirds of the canopy. The kinetin increased the pod set number up to 20.7%, in the middle third. The yield per plant was increased up to 27.1% using the highest kinetin concentration. The increases were attributed to an increase in the endogenous cytokinin levels that contribute to the higher production and better redistribution of assimilates to the pods and seeds.

【 授权许可】

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