Effect of biochar as a hydroponic substrate on growth, colour and nutritional content of red lettuce (Lactuca sativa L.)

IF 1.2 4区农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY

Bragantia Pub Date : 2023-04-14 DOI:10.1590/1678-4499.20220177

N. Rosli, Rosazlin Abdullah, J. S. Yaacob, Raja Balqis Raja Razali

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引用次数: 0

Abstract

: Hydroponic is a technique of growing plants in a soilless medium by using a sponge, rock wool, hydroton, coconut coir, and perlite as an alternative for crop production systems. Recently, biochar has been reported to be a potential substrate for hydroponic cultivation techniques due to its physicochemical properties which can help increase vegetable production. A greenhouse study was conducted to investigate the effect of biochar as hydroponic substrate on the growth, colour and nutritional content of red lettuce (Lactuca sativa L.). This study utilized the nutrient film technique (NFT) hydroponic system and was conducted using a randomized complete block design with five treatments, including T1 (hydroton only), T2 (perlite only), T3 (palm kernel biochar), T4 (palm kernel biochar + hydroton), and T5 (palm kernel biochar + perlite). Data analysis revealed the treatment, which consists of both palm kernel biochar and hydroton (T4) resulted in a significant increase in plant growth and yielded the highest plant height (19.86 cm), leaf width (14.16 cm), plant fresh weight (68.19 g), and dry weight (8.29 g). The leaves nutrient content (N, P, K, Mg, Ca) of red lettuce grown in palm kernel biochar and hydroton (T4) substrates suggested the presence of optimal growth conditions for ensuring optimum yield with high quality. The application of palm kernel biochar and hydroton (T4) as substrate also showed a higher lightness value (L* = 66.67). Besides, the methanolic leaf extracts from the red lettuce grown in palm kernel biochar and hydroton (T4) showed the highest bioactive metabolite content. In addition, the application of palm kernel biochar (T3) as a hydroponic substrate decreased the algal density in the nutrient solution. In conclusion, the combination of palm kernel biochar and hydroton as a substrate was observed to be the best in enhancing the growth performance, colour, and nutritional content of red lettuce ( Lactuca sativa L.), and it is therefore recommended to be used as the growth substrate in the NFT system.

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生物炭作为水培基质对红莴苣生长、色泽和营养成分的影响

水培法是一种在无土培养基中种植植物的技术，利用海绵、岩棉、氢化物、椰子椰子和珍珠岩作为作物生产系统的替代品。近年来，生物炭因其物理化学特性而成为水培技术的潜在基质，有助于提高蔬菜产量。通过温室试验，研究了生物炭作为水培基质对红莴苣生长、色泽和营养成分的影响。本研究采用营养膜技术(NFT)水培系统，采用随机完全区组设计，共设置5个处理，分别为T1(纯氢)、T2(纯珍珠岩)、T3(棕榈仁生物炭)、T4(棕榈仁生物炭+氢)和T5(棕榈仁生物炭+珍珠岩)。数据分析表明，棕榈仁生物炭和氢(T4)处理显著提高了红生菜的植株生长，最高株高(19.86 cm)、叶宽(14.16 cm)、鲜重(68.19 g)和干重(8.29 g)。在棕榈仁生物炭和氢(T4)基质上生长的红生菜叶片养分含量(N、P、K、Mg、Ca)表明存在最佳生长条件，以确保最佳产量和高品质。以棕榈仁生物炭和氢(T4)为底物，也表现出较高的亮度值(L* = 66.67)。此外，棕榈仁生物炭和氢(T4)中生长的红生菜叶片甲醇提取物的生物活性代谢物含量最高。此外，施用棕榈仁生物炭(T3)作为水培基质降低了营养液中的藻类密度。综上所述，棕榈仁生物炭与氢作为基质对红莴苣生长性能、色泽和营养成分的提高效果最好，推荐作为NFT体系中的生长基质。

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

Bragantia AGRICULTURE, MULTIDISCIPLINARY-

CiteScore

2.40

自引率

8.30%

发文量

审稿时长

4 weeks

期刊介绍： Bragantia é uma revista de ciências agronômicas editada pelo Instituto Agronômico da Agência Paulista de Tecnologia dos Agronegócios, da Secretaria de Agricultura e Abastecimento do Estado de São Paulo, com o objetivo de publicar trabalhos científicos originais que contribuam para o desenvolvimento das ciências agronômicas. A revista é publicada desde 1941, tornando-se semestral em 1984, quadrimestral em 2001 e trimestral em 2005. É filiada à Associação Brasileira de Editores Científicos (ABEC).