Brachiaria sp yield and nutrient contents after nitrogen and sulphur fertilization

Revista Brasileira de Ciência do Solo

Reges Heinrichs²  Fernanda Grecco Grano¹  Leda Gobbo De Freitas Bueno²  Cecílio Viega Soares Filho¹  Jailson Lara Fagundes¹  Melina Daniel Rebonatti¹  Katia De Oliveira² 

[1] ,Univ Estadual Paulista Júlio de Mesquita FilhoDracena SP

关键词: fertilization;    Brachiaria decumbens;    plant nutrition;    forage plants;    adubação;    Brachiaria decumbens;    nutrição de plantas;    plantas forrageiras;   

DOI  :  10.1590/S0100-06832013000400017

来源: SciELO

【 摘 要 】

Among the production factors, adequate fertilization is an important tool to raise the productivity of pastoral systems and consequently increase the share of Brazil in the supply chain of primary agricultural products at the global level. The objective of this study was to evaluate the interaction of nitrogen and sulfur fertilization in BRACHIARIA DECUMBENS: Stapf. The experiment in pots with Dystrophic Oxisol was evaluated in a completely randomized design with four replications in a 5 x 3 factorial arrangement, involving five N doses (0, 100, 200, 400, and 800 mg dm-3) in the form of ammonium nitrate and three S doses (0, 20 and 80 mg dm-3) in the form of calcium sulfate, with a total of 15 treatments. In the treatments with low S dose, calcium was provided as calcium chloride, to ensure a homogeneous Ca supply in all treatments. The results showed that the tiller production and dry weight of green leaves and of stems + sheaths and total dry weight were favored by the combination of N and S fertilizer, while the proportion of dry leaves was reduced. Nitrogen fertilization raised the N contents in green leaves and stems + sheaths and reduced K contents in fresh and dry leaves. The response to S rates in the N content of green leaves was quadratic.

【 授权许可】

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