Formation of ‘Crioula’ guava rootstock under saline water irrigation and nitrogen doses
ABSTRACT The objective of this research was to evaluate the growth and formation of fresh and dry weight of ‘Crioula’ guava rootstock irrigated with waters of different saline levels and nitrogen (N) doses, in an experiment conducted in plastic tubes under greenhouse conditions. The experimental des...
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Published in | Revista brasileira de engenharia agrícola e ambiental Vol. 20; no. 8; pp. 739 - 745 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
ATECEL--Associacao Tecnico Cientifica Ernesto Luiz de Oliveira Junior
01.08.2016
Departamento de Engenharia Agrícola - UFCG |
Subjects | |
Online Access | Get full text |
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Summary: | ABSTRACT The objective of this research was to evaluate the growth and formation of fresh and dry weight of ‘Crioula’ guava rootstock irrigated with waters of different saline levels and nitrogen (N) doses, in an experiment conducted in plastic tubes under greenhouse conditions. The experimental design was randomized blocks, in a 5 x 4 factorial scheme with four replicates, and the treatments consisted of five levels of water electrical conductivity - ECw (0.3, 1.1, 1.9, 2.7 and 3.5 dS m-1) and four N doses (70, 100, 130 and 160% of the N dose recommended for the cultivation of guava seedlings, cv. ‘Paluma’). The dose referring to 100% corresponds to 773 mg of N dm-3. The highest growth of ‘Crioula’ guava rootstock was obtained with ECw of 0.3 dS m-1 and fertilization of 541.1 mg N dm-3 of soil; increasing N doses did not reduce the deleterious effect of the salt stress on the growth and phytomass formation of ‘Crioula’ guava rootstock; irrigation with water of up to 1.75 dS m-1, in the production of guava rootstocks, promotes acceptable reduction of 10% in growth and quality of the seedlings.
RESUMO Objetivou-se, com esta pesquisa, avaliar a formação de porta-enxerto de goiabeira ‘Crioula’ irrigada com águas de distintos níveis de salinidade e doses de nitrogênio, em experimento conduzido em tubetes sob condições de ambiente protegido. Utilizou-se o delineamento experimental de blocos casualizados, em esquema fatorial 5 x 4, com quatro repetições, sendo os tratamentos compostos de cinco níveis de condutividade elétrica da água – CEa (0,3; 1,1; 1,9; 2,7 e 3,5 dS m-1) e quatro doses de nitrogênio (70, 100, 130 e 160% de N da dose recomendada para cultivo de mudas de goiabeira cv. Paluma). Sendo a dose referente a 100% correspondente a 773 mg de N dm-1. O maior crescimento de porta-enxerto de goiabeira ‘Crioula’ foi obtido com água de condutividade elétrica de 0,3 dS m-1 e adubação com 541,1 mg de N dm-3 de solo; doses crescentes de nitrogênio não reduziram o efeito deletério do estresse salino sobre o crescimento e a formação de fitomassa de porta-enxerto de goiabeira cv. Crioula; a irrigação com água de até 1,75 dS m-1, na produção de porta-enxerto de goiabeira, promove redução aceitável de 10% no crescimento e na qualidade de mudas. |
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ISSN: | 1415-4366 1807-1929 1415-4366 1807-1929 |
DOI: | 10.1590/1807-1929/agriambi.v20n8p739-745 |