Fertilidade do solo e características bromatológicas em pastagens naturais em comparação com áreas onde era realizada integração lavoura pecuária

Abstract

The objective of this study is to evaluate the consequences of production in the region of the campaign, which has undergone several changes in recent years, through the advance of soybean crops and consequently the integration of livestock farming (ILP) Clay content), chemical (Ca + 2, Mg + 2, K +, P +, Al + 3, H +, and organic matter contents of the pampa biome) , CTC, pH 7.0, base sum and% base saturation and Al + 3) and physical-chemical (pH in water and SMP index), and observation of the bromatological characteristics by dry matter analysis (MS ), Neutral detergent fiber (NDF), acid detergent fiber (FDA), and crude protein (CP). The work was carried out in rural property in the municipality of Bagé-RS, where it is practiced bovinocultura and ovine breeding in an extensive way and soybean cultivation. The objective of this study is to compare and analyze an area that has undergone ILP with a total of 17ha for 3 consecutive years and for 2 years ILP has not been practiced with a contiguous area of native field unchanged. Soils were collected from both areas, five of which were CN, and five were ILP. CN high one, CN high two, CN third slope, CN low four and CN low five. ILP high one, ILP high two, ILP three hillside, ILP low four and ILP low five. For the bromatological analysis, six samples from both areas were divided into high CN, high CN two, CN one slope, CN two slope, CN one low and CN two low, and one high ILP, two high ILP, one ILP slope one , ILP down two, ILP down one, ILP down two. A decrease in the nutrient content of the soil where ILP was practiced was observed in comparison with the CN. In general, there were no differences in DM among the areas, mean value of 32.6% MS CN, and 32.16% MS, where ILP was practiced. The averages were 69.39% of NDF in MS CN, and 70.89% of NDF in MS where ILP was practiced. The mean values of CN were 33.76% ADF in MS versus 35.67% ADF in MS in ILP. The mean values of crude protein NC were 8.25% CP in MS versus 7.24% CP in MS in the area where ILP was practiced. In general it was possible to verify a better quality of CN, forage species of better nutritional quality require more fertile soils, while species of lower nutritional value adapt in more acidic soils and with lower nutritional contents.