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Production and quality of Urochloa decumbens (stapf) r.d. webster forage co-related to the physical and chemical properties of the soil

ABSTRACT Frequently degraded pastureland characterized by low soil fertility and compacted surface is the basic environment of Brazilian livestock. The physical and chemical characterization of soil and its co-relationship with forage production are determining factors for performance of animals rai...

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Published in:Revista Ceres 2017-06, Vol.64 (3), p.315-326
Main Authors: Dalchiavon, Flávio Carlos, Montanari, Rafael, Andreotti, Marcelo
Format: Article
Language:English
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Summary:ABSTRACT Frequently degraded pastureland characterized by low soil fertility and compacted surface is the basic environment of Brazilian livestock. The physical and chemical characterization of soil and its co-relationship with forage production are determining factors for performance of animals raised on pasture. The objective was to analyze the forage production of Urochloa decumbens grass correlated, linearly and spatially, with physical and chemical attributes of a savannah soil in Selvíria - MS, Brazil. A geostatistical web was introduced for the collection of soil and plant data, with 120 sampling sites within an area of 56.09 ha. The descriptive analysis of the data was undertaken and linear co-relationships, both simple and multiple, were established between plant and soil properties. Semivariograms were modeled and their respective krigings and cross-validations obtained, coupled to co-krigings (plant and soil). Production of dry matter and crude protein rates of U. decumbens may be estimated by regressions and the mechanical resistance to penetration and gravimetric humidity of the soil evaluated. Since organic matter rate and the gravimetric humidity of the soil are co-related spatially with the rate of crude protein of U. decumbens, they are the best factors to calculate or increase the forage crude protein rate. RESUMO A pecuária brasileira está fundamentada em pastagens, muitas vezes degradadas, e que tem como indicativos desta degradação, a queda de fertilidade do solo e a compactação superficial do solo. Portanto, a caracterização físico-química do solo e a sua correlação com a produção de forragem são determinantes para o desempenho animal em pasto. No ano de 2009, no município de Selvíria - MS, Brasil, em condições de Cerrado, objetivou-se analisar os atributos produtivos de Urochloa decumbens correlacionado-os, linear e espacialmente, com atributos físico-químicos de um solo de Cerrado. Foi instalada uma malha geoestatística para a coleta de dados do solo e da planta, com 120 pontos amostrais, numa área de 56,09 ha. Realizou-se a análise descritiva dos dados, estabelecendo-se correlações lineares, simples e múltiplas, entre os atributos da planta e os do solo. Foram modelados semivariogramas, obtendo-se as respectivas krigagens e validações cruzadas. Também foram estabelecidas as cokrigagens de interesse (planta x solo). Tanto a produção de matéria seca quanto os teores de proteína bruta de U. decumbens podem ser estimados por meio de re
ISSN:0034-737X
2177-3491
0034-737X
DOI:10.1590/0034-737x201764030013