Efeitos de níveis de cobertura do solo sobre a produtividade e crescimento do feijoeiro irrigado, em sistema de plantio direto

• Autor(a) principal: Chieppe Jr., João Baptista
• Data de Publicação: 2007
• Outros Autores: Pereira, Ana Lucia, Stone, Luis Fernando, Moreira, José Aluísio Alves, Klar, Antonio Evaldo [UNESP]
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://200.145.140.50/ojs1/viewarticle.php?id=229&layout=abstract; http://hdl.handle.net/11449/69583
• topic: Braquiária decumbens L; No tillage system; Phaseolus vulgaris; Cultivation; Soil moisture; Sprinkler systems (irrigation); Surface tension; Vegetation; crop yield; dry matter; growth; irrigation system; leaf area index; mulching; soil water potential; water use efficiency; zero tillage; Brachiaria; Urochloa brizantha

The objective of this research was to study the effects of five different treatments of grass (Brachiaria decumbens) straw mulch on common beans (Phaseolus vulgaris L.): 0% (0 t.ha-1), 25% (2,25 t.ha-1), 50% (4,5 t.ha-1), 75% (6,75 t. ha-1) and 100% (9,0 t/ha) designed by randomized blocks, with four replicates. The irrigation was applied when minimum soil water potential were reached about - 30kPa. The water management based on tensiometers and soil water characteristic curve. A microsprinkler irrigation system was used. The experiment was set up at the Experimental Station of Embrapa Rice and Bean (Empresa Brasileira de Pesquisa Agropecuária Arroz e Feijão) at Santo Antonio de Goiás, Brazil, in a Dark - Red Latosol soil. The results showed: the bean yield and his components were not affected by treatments, except grain number/pod,. The mulch increased the water use efficiency and, consequently, decreased the number of irrigations when the mulch reached more than 50% straw mulch. The treatment with 100% of mulching presented the largest leaf area index and dry matter accumulation was not affected by mulching.