ASSESSMENT OF LEGUMES WITH POTENTIAL USE AS GREEN MANURE IN THE COASTAL TABLELANDS OF PIAUÍ STATE, BRAZIL
ABSTRACT Green manure may lead to physical, chemical, and biological improvements to the soil. However, the information on its use in the Brazilian Northeast is scarce. The aim of this study was to assess the phenological cycle and phytomass productivity of seven legume species. This study was condu...
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Published in: | Caatinga Vol. 31; no. 3; pp. 584 - 592 |
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Main Authors: | , , |
Format: | Journal Article |
Language: | English |
Published: |
Mossoro
Universidade Federal Rural do Semiárido
01-07-2018
Universidade Federal Rural do Semi-Árido |
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Online Access: | Get full text |
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Summary: | ABSTRACT Green manure may lead to physical, chemical, and biological improvements to the soil. However, the information on its use in the Brazilian Northeast is scarce. The aim of this study was to assess the phenological cycle and phytomass productivity of seven legume species. This study was conducted in the second semester of 2015 in a completely randomized design with seven treatments and four replications. Plant height, fresh mass of shoot (FMS), dry mass of shoot (DMS), fresh mass of root (FMR), and dry mass of root (DMR) were determined at 100 days after sowing. Germination, flowering, and pod maturation were also assessed. The highest averages of FMS were observed in Crotalaria breviflora and Crotalaria mucronata, followed by Canavalia ensiformis, whereas the highest averages of DMS were observed in C. breviflora, C. ensiformis, C. mucronata, and Cajanus cajan cv. IAPAR 43. The highest averages of FMR were obtained by C. breviflora and C. mucronata, followed by C. cajan cv. Fava Larga. The species C. mucronata, C. cajan cv. IAPAR 43, and C. breviflora presented the highest averages of DMR. In addition, C. juncea, C. ensiformis, and C. cajan cv. IAPAR 43 were the earlier species regarding flowering, while C. cajan cv. Fava Larga was the later species. C. juncea was the earliest among all studied species regarding pod maturation. The tested legume species obtained promising initial results during the assessment period, being able to meet the expectations of biomass production and contributing to soil sustainability in this region.
RESUMO A adubação verde pode atribuir melhorias físicas, químicas e biológicas aos solos, porém, são escassas as informações de uso no nordeste brasileiro. Objetivou-se avaliar o ciclo fenológico e as produtividades de fitomassa de sete espécies de leguminosas. O trabalho foi conduzido durante o segundo semestre de 2015, em delineamento inteiramente casualizado, com sete tratamentos e quatro repetições. Aos 100 dias após semeadura (DAS) foram determinadas a altura das plantas, massa fresca (MFPA) e seca da parte aérea (MSPA), massa fresca (MFR) e seca da raiz (MSR). Avaliou-se também a germinação, florescimento e maturação das vagens. As maiores médias para MFPA foram obtidas pelas Crotalaria breviflora e Crotalaria mucronata, seguidas da Canavalia ensiformis. As mais produtivas para MSPA foram C. breviflora, C. ensiformis, C. mucronata, e Cajanus cajan Cv IAPAR 43. As maiores médias para MFR foram obtidas pelas C. breviflora e C. mucronata, seguidas do C. cajan Cv Fava Larga. A C. mucronata, C. cajan Cv IAPAR 43 e C. breviflora foram as espécies que obtiveram as maiores médias de MSR. A Crotalaria juncea, C. ensiformis e C. cajan Cv IAPAR 43 foram as espécies mais precoces em relação à floração, enquanto que C. cajan Cv Fava Larga foi a espécie mais tardia. C. juncea foi a mais precoce, entre todas as espécies estudadas, para a variável maturação das vagens. As espécies de leguminosas testadas obtiveram, durante o período de avaliação, resultados iniciais promissores, podendo atender as expectativas de produção de biomassa, além de contribuir para a sustentabilidade dos solos desta região. |
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ISSN: | 0100-316X 1983-2125 1983-2125 |
DOI: | 10.1590/1983-21252018v31n306rc |