Data/hora: 09/06/2024 05:31:35

Provedor de dados: | 91
País: | Brazil
Título: | Growth and gas exchanges in soursop under irrigation with saline water and nitrogen sources
Autores: | Silva,Evandro M. da; Lima,Geovani S. de; Gheyi,Hans R.; Nobre,Reginaldo G.; Sá,Francisco V. da S.; Souza,Leandro de P.
Data: | 2018-11-01
Ano: | 2018
Palavras-chave: | Annona muricata L.; Salinity; Nitrogen; Photosynthesis.
Resumo: | ABSTRACT Nitrogen (N) fertilization has been tested for the mitigation of salt stress in some species including fruit crops. However, special attention should be paid to the source of N, due to the different compositions and saline indices of the fertilizers, particularly when irrigation is conducted using waters with salinity levels that are restrictive to agriculture. Thus, this study evaluated the effect of fertilization with N sources on the growth and gas exchanges of soursop irrigated with saline water after transplanting. The experiment was carried out in greenhouse at the Center of Technology and Natural Resources of the Federal University of Campina Grande, and treatments were arranged in randomized blocks, in 4 x 4 factorial scheme, corresponding to electrical conductivity of water - 0.5, 1.1, 2.5 and 3.5 dS m-1, and the N sources urea, ammonia sulfate, calcium nitrate and potassium nitrate, with three replicates. Growth and gas exchanges of soursop at 110 days after transplanting were not influenced by either the interaction between water salinity and N sources or the individual action of N, but were inhibited by the increase in water salinity from 0.5 dS m-1. Increasing water salinity inhibited stomatal opening and carboxylation in the leaves.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001100776
Editor: | Departamento de Engenharia Agrícola  - UFCG
Relação: | 10.1590/1807-1929/agriambi.v22n11p776-781
Formato: | text/html
Fonte: | Revista Brasileira de Engenharia Agrícola e Ambiental  v.22 n.11 2018
Fonte: | info:eu-repo/semantics/openAccess