期刊论文详细信息
Revista Árvore
Carbon sequestration and nutrient reserves under differen t land use systems
Maria Ivanilda Aguiar2  Jamili Silva Fialho1  Mônica Matoso Campanha1  Teógenes Senna Oliveira1 
[1] ,Instituto Federal de Educação, Ciência e Tecnologia do Piauí
关键词: Agroecology;    Family farming;    Agroforestry;    Agroecologia;    Agricultura familiar;    Sistemas agroflorestais;   
DOI  :  10.1590/S0100-67622014000100008
来源: SciELO
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【 摘 要 】

This study evaluated the contribution of agroforestry (AFS) and traditional systems to carbon sequestration and nutrient reserves in plants, litter and soil. The study was carried out in the semiarid region of Brazil in a long-term experiment on an experimental farm of the goat and sheep section of the Brazilian Agricultural Research Corporation (Embrapa). Two agroforestry systems were investigated: agrosilvopastoral (ASP) and forest-pasture areas (SP) as well as traditional agriculture management (TM), two areas left fallow after TM (six fallow years - F6 and nine fallow years - F9) and one area of preserved Caatinga vegetation (CAT). Soil, litter and plants were sampled from all areas and the contents of C, N, P, K, Ca and Mg per compartment determined. The AFS (ASP and SP) had higher nutrient stocks than the traditional and intermediate stocks compared to the preserved Caatinga. In the ASP, a relevant part of the nutrients extracted by crops is returned to the system by constant inputs of litter, weeding of herbaceous vegetation and cutting of the legume crops. After fallow periods of six and nine years, carbon and nutrient stocks in the compartments soil, litter and herbaceous plants were similar to those of the preserved Caatinga (CAT), but still lower than under natural conditions in the woody vegetation.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License

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