Response of lettuce grown in potting soil semi-solidified with agar

IF 2.4 3区 农林科学 Q1 Agricultural and Biological Sciences
Chao-Zong Cai, How-Chiun Wu
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引用次数: 0

Abstract

The aim of the study was to develop a soil-based cultivation method to grow lettuce indoors for 28 days without the need for irrigation or fertilization, and to investigate their growth and physiological responses in this novel growing substrate. Agar (15 g L− 1) was added to a soil mixture, which comprised potting soil, perlite, fertilizer, and water, to semi-solidify it into a substrate block. Lettuce seeds were sown in the semi-solidified substrate, which was prepared in a custom-made, enclosed container with planting holes in the lid. Three different soil-to-water (SW) ratio (v:v) treatments were used to prepare the soil substrate: SW1:1; SW1:2; SW2:1, and three fertilizer treatments were tested: no fertilizer (control); urea; NPK (15:3:3) fertilizer. Results showed that the semi-solidified soil substrates can be used to successfully grow lettuce for 28 days, however, the extent of their growth varied depending on the soil-water ratio and fertilizer treatment. Lettuce plants grown in the NPK-enriched SW2:1 substrate had significantly higher number of leaves, leaf area, and dry weight compared to all the other treatments. In contrast, the lettuce plants grown without additional fertilizers exhibited poor growth regardless of the soil-water ratio used. In the growing substrates supplemented with urea, the SW1:2 ratio treatment produced lettuces with the lowest leaf number, leaf area, leaf fresh weight, and dry weight. Overall, the chlorophyll a/b ratio and Fv/Fm value of lettuces grown in substrate fertilized with NPK were found to be higher than all the other treatments. The key feature of this cultivation method was the use of agar to semi-solidify the waterlogged soil mixture and transform it into a growing substrate that provided the necessary water and nutrients for plant growth over a 28-day period. The growing substrate developed in this study, which is the first of its kind, can be considered as a new soil-based method of growing lettuce indoors.

Abstract Image

莴苣在琼脂半固化盆栽土壤中的反应
该研究旨在开发一种基于土壤的栽培方法,使莴苣在无需灌溉或施肥的情况下在室内生长 28 天,并研究其在这种新型生长基质中的生长和生理反应。在由盆栽土、珍珠岩、肥料和水组成的土壤混合物中加入琼脂(15 g L-1),使其半固化成基质块。生菜种子播种在半固化基质中,基质是在一个定制的封闭容器中准备的,容器盖上有种植孔。在制备土壤基质时,采用了三种不同的水土(SW)比(v:v)处理方法:测试了三种肥料处理:无肥(对照);尿素;氮磷钾(15:3:3)肥料。结果表明,半固化土壤基质可使生菜成功生长 28 天,但其生长程度因水土比和肥料处理而异。与所有其他处理相比,在富含氮磷钾的 SW2:1 基质中生长的生菜植株的叶片数、叶面积和干重都明显较高。相比之下,无论使用哪种水土比,在未添加额外肥料的情况下生长的莴苣植株都表现出生长不良。在添加尿素的生长基质中,SW1:2 比例处理的莴苣叶片数量、叶片面积、叶片鲜重和干重都最低。总体而言,在施用氮磷钾的基质中生长的生菜的叶绿素 a/b 比值和 Fv/Fm 值高于所有其他处理。这种栽培方法的主要特点是使用琼脂使积水的土壤混合物半固化,并将其转化为生长基质,在 28 天的时间里为植物生长提供所需的水分和养分。本研究中开发的生长基质是首创,可视为一种基于土壤的室内生菜生长新方法。
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
Horticulture Environment and Biotechnology
Horticulture Environment and Biotechnology Agricultural and Biological Sciences-Horticulture
CiteScore
4.30
自引率
4.20%
发文量
0
审稿时长
6 months
期刊介绍: Horticulture, Environment, and Biotechnology (HEB) is the official journal of the Korean Society for Horticultural Science, was launched in 1965 as the "Journal of Korean Society for Horticultural Science". HEB is an international journal, published in English, bimonthly on the last day of even number months, and indexed in Biosys Preview, SCIE, and CABI. The journal is devoted for the publication of original research papers and review articles related to vegetables, fruits, ornamental and herbal plants, and covers all aspects of physiology, molecular biology, biotechnology, protected cultivation, postharvest technology, and research in plants related to environment.
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