盐水和遮荫对火龙果幼苗生长的影响

IF 1.4 4区 农林科学 Q3 AGRICULTURAL ENGINEERING Revista Brasileira de Engenharia Agricola e Ambiental Pub Date : 2021-08-01 DOI:10.1590/1807-1929/AGRIAMBI.V25N8P547-552
G. G. Sousa, S. B. Sousa, Ana C. da S. Pereira, V. B. Marques, M. A. D. Silva, J. Lopes
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引用次数: 3

摘要

火龙果(Hylocereus undatus)是半干旱地区的一种有果实的攀缘仙人掌,具有很大的食物潜力。研究了不同光照条件下低盐水和高盐水灌溉对火龙果幼苗产量的影响。试验采用2 × 2因子全随机设计,灌溉水电导率分别为S1 - 0.3 dS - m-1(低盐度)和S2 - 5.0 dS - m-1(中盐度),试验环境为A1 - 50%遮阳黑网和A2 -全日照,共10个重复。评价变量为株高、主枝径、地上生物量、根系生物量、植株总生物量、次生枝数、根长和次生枝长。50%遮荫(黑网)能提高火龙果植株的株高、次生芽数和根长。中盐水(5.0 dS m-1)灌溉减少了次生枝的数量、根的长度和次生枝的长度。在50%遮荫(黑网)下生长的火龙果幼苗,在低盐度水的灌溉下,根系干生物量更大。在充分光照和高盐胁迫下,初生枝的直径、地上干生物量和总干生物量均较大。
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Effect of saline water and shading on dragon fruit (‘pitaya’) seedling growth
ABSTRACT ‘Pitaya’ (Hylocereus undatus) is a fruit-bearing, climbing cactus with great food potential for the semiarid region. This study aimed to evaluate the production of ‘pitaya’ seedlings irrigated with low and high salinity water and grown in different light intensities. The experiment was conducted in a completely randomized design, in a 2 × 2 factorial arrangement, with two electrical conductivities of irrigation water: S1 - 0.3 dS m-1 (low salinity) and S2 - 5.0 dS m-1 (moderate salinity) in two environments: A1 - black net with 50% shading, and A2 - full sun, with ten replicates. The variables evaluated were plant height, main cladode diameter, above-ground biomass, root biomass, total plant biomass, number of secondary cladodes, root length, and length of secondary cladodes. The 50% shading (black net) promoted higher plant height, number of secondary shoots, and root length of the ‘pitaya’ plants. The irrigation with moderate saline water (5.0 dS m-1) reduced the number of secondary cladodes, length of root, and length of secondary cladodes. The ‘pitaya’ seedlings grown under 50% shading (black net) showed greater root dry biomass when irrigated with low-salinity water. Greater values of diameter of the primary cladode, above-ground dry biomass, and total dry biomass were observed under full sunlight and elevated saline stress.
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来源期刊
Revista Brasileira de Engenharia Agricola e Ambiental
Revista Brasileira de Engenharia Agricola e Ambiental Agricultural and Biological Sciences-Agronomy and Crop Science
CiteScore
2.70
自引率
16.70%
发文量
114
审稿时长
3-8 weeks
期刊介绍: A Revista Brasileira de Engenharia Agrícola e Ambiental (Agriambi), periódico oficial da Asociación Latinoamericana y del Caribe de Ingeniería Agrícola (ALIA), é editada mensalmente, no formato eletrônico, pela Unidade Acadêmica de Engenharia Agrícola (UAEA) do Centro de Tecnologia e Recursos Naturais (CTRN) da Universidade Federal de Campina Grande (UFCG), destinando-se à divulgação de artigos científicos originais e inéditos, elaborados em Português, Inglês ou Espanhol. Com o auxílio de pareceres de Consultores, os artigos são aceitos ou não pela Equipe Editorial para publicação na Revista. A Agriambi aceita, também, a submissão de contribuições na modalidade de revisão de literatura.
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