Estabelecimento, crescimento e rebrota de adubos verdes no Cariri Paraibano.

Abstract

The information on conservation practices and the use of improved soil quality plants should not socialized with family farmers, to promote improvements in the production system, minimizing the impact of farming on soil resources. The use of green manure is a viable way to mitigate the impacts of agriculture, bringing sustainability to agricultural soils form. Studies aiming at the characterization of plant species in different soil and climatic regions are importates to select those that best fit the concept of improved soil, in order to provide good coverage and increase levels of soil organic matter, thereby improving their quality. In this scenario, the survey, conducted in the experimental area of the CDSA / UFCG, aimed to evaluate the biomass production and regrowth ability of ten species of legumes used as green manure: mucunas (Mucuna deeringiana, M. aterrina, M. cinereum) crotalárias (Crotalaria spectabilis, C. breviflora, C. ochroleuca, C. juncea), pigeonpea cv broad bean (Cajanus cajan), jack bean (Canavalia ensiformis) and lablab (Dolichos lablab). Samples of green biomass production were performed in a portion of 9 m². Biomass production followed the decreasing order: lablab > jack bean > velvet bean > dwarf mucunas > C. juncea > C. spectabilis > C.ochroleuca > C.breviflora > gray velvet bean > pigeonpea. The dwarf mucuna and lablab not sprouted in research. The various species were presented and distributed to farmers in Field Day to socialize knowledge about the species and spread the practice of green manuring.