Sustainability of carrot-cowpea intercropping systems through optimization of green manuring and spatial arrangements
| Autor: | Francisco Bezerra Neto, Aridênia Peixoto Chaves, Jailma Suerda Silva de Lima, Renato Leandro Costa Nunes, Vitor Abel da Silva Lino, Gardênia Silvana de Oliveira Rodrigues, Josimar Nogueora da Silva, Jolinda Mércia de Sá, Elizangela Cabral dos Santos |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
competitive ability Agriculture (General) Dry basis Randomized block design Biomass 01 natural sciences Gross margin S1-972 Green manure Net income Mathematics General Veterinary biology Crop yield Merremia aegyptia Intercropping Agriculture 04 agricultural and veterinary sciences biology.organism_classification agro-economic efficiency Daucus carota Agronomy 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Animal Science and Zoology Agronomy and Crop Science Vigna unguiculata 010606 plant biology & botany |
| Zdroj: | Ciência Rural, Vol 51, Iss 1 (2020) Ciência Rural v.51 n.1 2021 Ciência Rural Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
| ISSN: | 1678-4596 |
| Popis: | One of the biggest challenges in intercropping of two or more crops is to maintain their productivity as that of their sole counterparts. In order to obtain sustainable intercropping systems in a semi-arid environment, this study evaluated the agro-economic advantage and sustainability of intercropped systems of carrot and cowpea, optimizing the green manuring and spatial arrangements. Experiments were conducted in the period from July to October 2017 and 2018, using a randomized complete block design with the treatments arranged in a 4 x 3 factorial scheme, with four replications. Treatments included four amounts of M. aegyptia incorporated into the soil (20, 35, 50, and 65 t ha-1 on dry basis) with three spatial arrangements (2:2, 3:3, and 4:4) between the components cultures formed from cowpea rows alternated with carrot rows. The agro-economic advantage indices evaluated in the intercropping systems were: land equivalent ratio (LER), area-time equivalent ratio (ATER), score of the canonical variable (Z), actual yield loss (AYL), intercropping advantage (IA), gross income (GI), net income (NI), rate of return (RR), and profit margin (PM). The highest agro-economic advantages of the carrot and cowpea intercropping were obtained for LER, ATER, NI, and RR of 2.60, 4.16, US$ 8,720.99 ha-1, and US$ 2.21, respectively, for M. aegyptia biomass amounts of 46.42, 47.82, 32.60 and 31.51t ha-1 added to the soil. The 2: 2 spatial arrangement was the one with the best productive performance, with higher net income and rate of return in the intercropping of carrot-cowpea. |
| Databáze: | OpenAIRE |
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