Agronomic performance of lettuce subjected to green manure with different leguminous species/Performance agronomica da alface submetida a adubacao verde com diferentes especies leguminosas

• Published in: Revista brasileira de engenharia agrícola e ambiental 2019-02, Vol.23 (2), p.114
• Main Authors: Sarmento, Jose J.A, dos Santos, Jose J.F, Costa, Caciana C, Bomfim, Marines P
• Format: Article
• Language: English
• ISSN: 1415-4366
• DOI: 10.1590/1807-1929/agriambi.v23n2p114-118

Green manure is the practice of cultivation and incorporation of plants to the soil, mainly leguminous species, produced or not in situ, for the purpose of preserving and/or restoring soil organic matter and soil nutrients. To compare the effects of incorporating leguminous species in the pre-planting green manure on lettuce production, seven treatments were tested: mineral fertilization; crotalaria (Crotalaria juncea); cowpea (Vigna unguiculata); common bean (Phaseolus vulgaris); lablab bean (Dolichos lablab); pigeon pea (Cajanus cajan) and spontaneous plants. The treatments were arranged in the randomized blocks, with five repetitions. The experiment was conducted in the experimental area of the CCTA/UFCG, in the period from April to December 2016. At 30 days after transplanting, the following variables were analyzed: number of leaves, head diameter, shoot height, root volume, fresh weight of shoots and roots, dry weight of shoots and roots, total fresh weight of shoots and roots, total dry weight of shoots and roots and yield. The results were subjected to analysis of variance and, when significant, Tukey test at 0.05 probability level was applied to compare the means. The results showed that, among the leguminous species, the use of lablab bean led to greater development and yield of lettuce. Key words: Lactuca sativa, nutrient cycling, plant nutrition, yield A adubacao verde e a pratica de cultivo e incorporacao de plantas ao solo, principalmente as leguminosas, produzidas no local ou nao, com a finalidade de preservacao e/ou restauracao do teor de materia organica e de nutrientes dos solos. Com o objetivo de comparar os efeitos da incorporacao de especies leguminosas na adubacao verde em pre-plantio na producao de alface, foram testados sete tratamentos: Adubacao mineral; crotalaria (Crotalaria juncea); feijao caupi (Vigna unguiculata); feijao Vagem (Phaseolus vulgaris); labe-labe (Dolichos lablab); feijao guandu (Cajanus cajan) e plantas espontaneas. Os tratamentos foram arranjados no delineamento de blocos casualizados, com cinco repeticoes. O experimento foi conduzido na area de experimentacao do CCTA/UFCG, no periodo de abril a dezembro de 2016. Aos 30 dias apos o transplantio foram analisadas: numero de folhas, diametro da cabeca, altura da parte aerea, volume de raiz, massa fresca da parte aerea e da raiz, massa seca da parte aerea e da raiz, massa fresca total da parte aerea e da raiz, massa seca total da parte aerea e da raiz e produtividade.