Water consumption and water use efficiency of ‘Biquinho’ pepper in hydroponic cultivation with brackish water

IF 0.8 4区农林科学 Q3 AGRONOMY

Ciencia Rural Pub Date : 2023-01-06 DOI:10.1590/0103-8478cr20220076

M. Bione, A. M. W. Cova, V. Paz, Ubirani Oliveira Santos, M. R. S. Rafael, Francisco José Nunes Modesto, H. Gheyi, T. M. Soares

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引用次数: 0

Abstract

ABSTRACT: The knowledge of water consumption and the efficiency of water use by crops is extremely important in the elaboration of agronomic and hydraulic projects of hydroponic systems. Thus, the present study determined the water consumption and water use efficiency of ‘Biquinho’ pepper cultivated in the hydroponic system using seven levels of electrical conductivity of the nutrient solution (ECsol) of 2.70, 3.64, 4.58, 5.28, 6.09, 6.90, and 7.77 dS m-1 and six replicates in randomized blocks. The hydroponic system used was the Nutrient Film Technique (NFT). The water consumption per plant was determined at an interval of ten days in the crop cycle (120 days after transplanting). The maximum mean daily water consumption was equal to 5.88 L plant-1 during the period 111-120 DAT, for ECsol of 4.58 dS m-1. The maximum water consumption for the crop cycle (120 DAT) was 275.66 L per plant for an estimated ECsol = 4.11 dS m-1. The highest water use efficiency (WUE), based on the total production of fruit fresh mass (ripe and unripe fruits) of ‘Biquinho’ pepper was 10.84 kg m-3 up to an estimated ECsol of 5.18 dS m-1, with an exponential reduction thereafter. The salinity of the nutrient solution, biomass production, and evapotranspiration are factors that influence the most water consumption of ‘Biquinho’ pepper.

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微咸水水培‘比基尼奥’辣椒耗水量及水分利用效率研究

摘要:在水培系统的农艺和水力工程设计中，了解作物的耗水量和利用效率是非常重要的。因此，本研究采用电导率为2.70、3.64、4.58、5.28、6.09、6.90和7.77 dS m-1的营养液(ECsol) 7个水平，随机分组6个重复，确定了水培系统栽培‘Biquinho’辣椒的耗水量和水分利用效率。水培系统采用营养膜技术(NFT)。每株耗水量在作物周期(移栽后120 d)每隔十天测定一次。2011 ~ 120dat期间最大平均日耗水量为5.88 L plant-1, ECsol为4.58 dS - m-1。在ECsol = 4.11 dS m-1的估算条件下，作物周期(120 DAT)的最大耗水量为每株275.66 L。基于果实新鲜质量(成熟和未成熟果实)的总产量，“Biquinho”辣椒的最高水分利用效率(WUE)为10.84 kg m-3，估计ECsol为5.18 dS m-1，此后呈指数下降。营养液的盐度、生物量产量和蒸散量是影响‘Biquinho’辣椒耗水量最大的因素。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ciencia Rural AGRONOMY-

CiteScore

1.70

自引率

0.00%

发文量

233

审稿时长

2-4 weeks

期刊介绍： The purpose of Ciência Rural is to publish the results of original research, note and reviews which contribute significantly to knowledge in Agricultural Sciences. Preference will be given to original articles that develop news concepts or experimental approaches and are not merely repositories of scientific data. The decison of acceptance for publication lies with the Editors and is based on the recommendations of Editorial Comission, Area Committee and/ or ad hoc reviewers. The editors and reviewers are external to the institution.