FORAGE PRODUCTION AND PRESERVATION OF SPECIES BY ENRICHING CAATINGA WITH GRASSES AND THINNING AREAS INTO STRIPS

Autor: Jefte Arnon de Almeida Conrado, Maria Socorro de Souza Carneiro, Ana Clara Rodrigues Cavalcante, Magno José Duarte Cândido, R. G. Tonucci
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: REVISTA CAATINGA; Vol. 32 No. 3 (2019); 814-825
Revista Caatinga; v. 32 n. 3 (2019); 814-825
Revista Caatinga
Universidade Federal Rural do Semi-Árido (UFERSA)
instacron:UFERSA
Revista Caatinga, Volume: 32, Issue: 3, Pages: 814-825, Published: 21 OCT 2019
ISSN: 1983-2125
0100-316X
Popis: The objective of this study was to evaluate the thinning into strips and the enrichment with exotic grasses in a Caatinga area in order to maintain and increase the biodiversity of native vegetable species and forage production. Two studies were carried out?one in an area of Caatinga thinned into strips and one in an unmanipulated Caatinga area?during the rainy and rainy-dry season transition periods in 2016. The production of herbaceous biomass was evaluated, and the diversity and equability of the two areas were assessed through Shannon-Weaver (H') and Pielou (J') indexes. The establishment of massai and buffel grasses at the center and edges of the area thinned into strips was also evaluated. During the rainy season, the production of herbaceous biomass in the area thinned into strips and the unmanipulated area was 1,228 kg ha-1 and 833.33 kg ha-1, while during the rainy-dry transition period, it was 1,973 kg ha-1 and 836.00 kg ha-1, respectively. The indexes remained similar: H' (1.86) and J' (0.74) for the area thinned into strips, and H' (1.77) and J' (0.85) for the unmanipulated area. The massai grass presented better establishment and development than that by the buffel grass in the center and edges of the area thinned into strips. Thus, thinning into strips increases the biodiversity of an area, and this combined with enrichment through grasses increases the biomass of herbaceous forage. Resumo: O objetivo deste estudo foi avaliar o raleamento em faixas e o enriquecimento com gramineas exoticas em uma area de Caatinga, de modo que fosse possivel manter e ou aumentar a biodiversidade de especies vegetais nativas, e intensificar a producao de biomassa de forragem. Dois estudos foram conduzidos em uma area de Caatinga raleada em faixas e em outra area de Caatinga nao manipulada no periodo chuvoso e transicao aguas-seca no ano de 2016. Avaliou-se a producao de biomassa herbacea e, a diversidade e equabilidade pelos indices de Shannon-Weaver (H') e Pielou (J') das areas raleada em faixas e nao manipulada. Foi ainda avaliado o estabelecimento dos capins massai e buffel ao centro e na lateral da area raleada em faixa. Na epoca das aguas a producao de biomassa herbacea na area raleada em faixas e nao manipulada foi de 1.228 kg ha-1 e 833, 33 kg ha-1, enquanto o periodo de transicao aguas-seca 1.973 kg ha-1 contra 836, 00 kg ha-1, respectivamente. Os indices permaneceram proximos H' (1, 86) e J?(0, 74), para a area raleada e H' (1, 77) e J' (0, 85) para a nao manipulada. O capim-massai apresentou melhor estabelecimento e desenvolvimento que o capim-buffel no centro e na lateral da area raleada em faixas. O raleamento em faixas aumenta a biodiversidade da area contribuindo juntamente com o enriquecimento no incremento de biomassa de forragem herbacea.
Databáze: OpenAIRE
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