Physiology of radish plants in different spatial arrangements

• Autor(a) principal: Lemos Neto, Hozano de Souza
• Data de Publicação: 2018
• Outros Autores: Maia, Celly de Lima, Costa, Maria Risocleuda da, Rabelo, Janiquelle da Silva, Hendges, Ana R´égia Alves de Araújo, Guimarães, Marcelo de Almeida
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista de Ciências Agrárias (Belém. Online)
• Texto Completo: https://ajaes.ufra.edu.br/index.php/ajaes/article/view/2831
• topic: Raphanus sativus L.; Gas exchanges; Chlorophyll; Liquid photosynthesis; Raphanus sativus L.; Trocas gasosas; Clorofila; Fotossíntese líquida

Radish (Raphanus sativus L.) is a short cycle crop, providing rapid economic return to the producer. For its appropriate cultivation, the definition of aspects related to the field implantation, the choice of the ideal crop spacing combined with the density of plants per hole, and the understanding of its effects on the physiology of the crop, help to obtain maximum productive efficiency. Thus, this study sought evaluate the physiological performance of radish plants subjected to different spatial arrangements between plants and plant density per hole. For such, an experiment using a randomized block design was conducted, with four replicates, in a 4 × 2 factorial scheme. The first factor was composed of four different plant spacings (0.05; 0.10; 0.15; 0.20 m) and the second by two cultivation densities (one and two plants per hole). Internal CO2 concentration, transpiration, stomatal conductance, liquid photosynthesis, ratio between environment and internal CO2 concentration, instantaneous carboxylation efficiency, gross photosynthesis, chlorophyll and leaf area were evaluated. The density of two plants per hole, combined with larger spacings were the combinations that provided the highest liquid photosynthesis and chlorophyll values for the plants. The density of one plant per hole combined with 0.05 to 0.15 m spacings between plants were the ones that enabled higher crude photosynthesis and fresh mass of tubers values. The density of one plant per hole and 0.05 m spacing enabled higher mean productivity values and is the most suitable for radish cultivation.