微咸水灌溉西瓜在不同种植制度下的形态生理及无机溶质

IF 0.9 4区 农林科学 Q3 AGRONOMY Revista Caatinga Pub Date : 2023-01-01 DOI:10.1590/1983-21252023v36n411rc
Francisco B. da Silva Junior, Claudivan F. de Lacerda, Geocleber G. de Sousa, Jonnathan R. da S. Sales, Andreza de M. Mendonça
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引用次数: 0

摘要

在巴西半干旱区,用微咸水灌溉会降低西瓜产量,因此需要制定管理策略来减少盐胁迫带来的负面影响。研究了不同电导率灌溉水对西瓜形态生理和无机溶质浓度的影响。这项实验是在巴西塞阿拉州的拜索阿卡拉灌溉区进行的。采用随机完全区组设计,分割图和4个重复。样地由灌溉水电导率为0.3、1.5、3.0和4.5 dS - m-1的4个水平组成,子样地由3种种植制度组成:dS =直接播种;TP1 =中盐度水(1.5 dS m-1)育苗移栽,TP2 =低盐度水(0.3 dS m-1)育苗移栽。分析了以下变量:营养生长、叶片气体交换和无机溶质。在营养生长阶段,使用中盐水培育的西瓜幼苗并不具有更高的耐盐性。无论采用何种种植方式,叶片Na+、Cl-和Ca2+浓度均随盐胁迫水平的增加而增加。然而,幼苗(TP1和TP2)在高盐度条件下具有更高的Na+和Cl-浓度。在低盐度条件下,直接播种法的生长指标表现较好。
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Morphophysiology and inorganic solutes in watermelon irrigated with brackish water in different planting systems
ABSTRACT Irrigation with brackish water reduces watermelon yield in the Brazilian semiarid region, requiring the establishment of management strategies that reduce the negative impacts caused by salt stress. The objective of this study was to evaluate the morphophysiology and concentration of inorganic solutes in watermelon crops subjected to different electrical conductivities of the irrigation water, using hardened seedlings or direct sowing. The experiment was conducted in the Baixo Acarau Irrigated Perimeter, in the state of Ceara, Brazil. A randomized complete block design was used, with split plots and four replications. The plots consisted of four electrical conductivity levels of the irrigation water (0.3, 1.5, 3.0, and 4.5 dS m-1), and the subplots consisted of three planting systems: DS = direct sowing; TP1 = transplanting of seedlings produced with moderate-salinity water (1.5 dS m-1), and TP2 = transplanting of seedlings produced with low-salinity water (0.3 dS m-1). The following variables were analyzed: vegetative growth, leaf gas exchange, and inorganic solutes. The use of watermelon seedlings produced with moderate-salinity water does not result in higher salt tolerance during the vegetative growth stage. Na+, Cl-, and Ca2+ leaf concentrations increase as the salt stress level is increased, regardless of the planting method. However, plants from seedlings (TP1 and TP2) have higher Na+ and Cl- concentrations when subjected to high salinity levels. The direct sowing method resulted in better performance of growth variables, mainly under low salinity levels.
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来源期刊
Revista Caatinga
Revista Caatinga AGRONOMY-
CiteScore
2.10
自引率
11.10%
发文量
67
审稿时长
6-12 weeks
期刊介绍: A Revista Caatinga é uma publicação científica que apresenta periodicidade trimestral, publicada pela Pró-Reitoria de Pesquisa e Pós-Graduação da Universidade Federal Rural do Semi-Árido – UFERSA, desde 1976. Objetiva proporcionar à comunidade científica, publicações de alto nível nas áreas de Ciências Agrárias e Recursos Naturais, disponibilizando, integral e gratuitamente, resultados relevantes das pesquisas publicadas.
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