Efeitos de diferentes doses de composto de casca de coco verde no desenvolvimento inicial de plantas de soja

• Autor(a) principal: Mendes, Jones de Oliveira
• Data de Publicação: 2019
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/50483
• topic: Glycine max (L.) Merrill; Adubação orgânica; Trocas gasosas; Biometria

The objective of this study was to evaluate the effect of different doses of green coconut shell compound on the initial development, gas exchange and physiology of two soybean cultivars (Pampeana 40 RR and Pampeana 60 RR). The experiment was carried out in a greenhouse belonging to the Department of Phytotechnics, Federal University of Ceará. The experimental design used was a completely randomized design (DIC) in a 2x6 factorial arrangement (2 genotypes x 6 doses) with five replications, each repetition formed by one plant, totaling 60 experimental units. Biometric variables (height, leaf number, stem diameter, leaf area and dry matter) and physiological variables (gas exchange, photosynthetic pigments) were evaluated. Significant increments were observed for plant height, stem diameter, leaf number, leaf area, leaf dry mass, stem dry mass and root dry mass when using doses of green coconut shell compost of the order of : 51,10%, 31,60%, 52,83%, 61,78%, 79,65%, 81,52%, 6,06%, respectively. Regarding physiological variables, it was noted that cultivar 60 RR was superior to cultivar 40 RR. The green coconut shell compost had a positive influence on the biometric characteristics of the studied soybean cultivars reaching the best response on average with 30 t of compost per hectare. As variables Chlorophyll b, Total chlorophyll, Liquid photosynthesis, Stomach conductance, Sweating, Internal carbon, carotenoids and water use efficiency, obtain the positive and useful responses when using the green coconut compound.