Optimizing Temperature and Photoperiod in a Home Cultivation System to Program Normal, Delayed, and Hastened Growth and Development Modes for Leafy Oak-Leaf and Romaine Lettuces

Abstract

As the risk of open-field cultivation increases with climate change, some analysts say that the day when ordinary vegetables will be produced at home is not far away. Moreover, due to the recent coronavirus outbreak, outdoor activities are becoming difficult, leisure activities that can be done at home have become more necessary, and the demand for home gardening has increased. This study was conducted to improve the technology for hydroponics at home. We experimented with whether the harvest time can be hastened or delayed by environmentally controlling the growing season, and what conditions are appropriate. Experiments were conducted with leafy vegetables (Lactuca sativa L. ‘Oak-leaf’ and Lactuca sativa L. var. longifolia, or romaine) that can easily be grown in a closed plant cultivator in which the external air can circulate, and the temperature/photoperiod can be controlled. Two settings for the temperature (25/18 °C and 20/15 °C; day/night) and three settings for the photoperiod (10, 14, and 18 hours; day/night) were employed. It took a total of four weeks from sowing to harvest, and the appropriate harvest time was predicted from the yield. As a result, although there was a difference depending on the vegetable variety, a temperature setting of 25/18 °C and a photoperiod of 14 hours were the most suitable for hastened growth, and a 20/15 °C temperature and 18 hours of photoperiod were suitable for the delayed growth.

Silicon Supplementation Alleviates Adverse Effects of Ammonium on Ssamchoo Grown in Home Cultivation System

“…Ethanol, acetone, and distilled water were mixed to make an extraction solution [ 39 ]. The collected sample was immersed in this solution and the chlorophyll was extracted at 4 °C for 24 h. The absorbance of the extracted solution was measured at 645 and 663 nm using a spectrometer (Libra S22, Biochrom Co., Ltd., Cambridge, UK), and the chlorophyll content was subsequently calculated according to the method described by Noh and Jeong (2021) [ 40 ]. Root samples (0.1 g) were collected to measure the root activities.…”

Home food gardening in modern cities: advances, issues, and future perspectives

“…As a layperson-friendly vegetable, romaine lettuce (Lactuca sativa L. var. longifolia) grows fast and can easily be cultivated in human settlements using soil culture, substrate culture, or hydroponics (Majid et al, 2021;Noh and Jeong, 2021). A handful of leafy vegetables used for spices are also suitable for HFG, for instance, basil (Ocimum basilicum L.) and rosemary (Rosmarinus officinalis L.) (Aditya and Zakiah, 2022;Kim et al, 2022).…”

Air Parameter Analysis for Precision Agriculture in Controlled Engineering

“…These lists include properties that are offered for short-term, long-term, or permanent rental. It is critical to provide financial and institutional support for public urban agricultural initiatives in addition to resolving concerns of land access and zoning rules [11][12][13][14][15][16][17].…”

“…An advanced level of environmental control is essential for the appropriate growing conditions in order to control the productivity and maintain uniform quality of the crops. This paper will conduct and analyze the air parameter specifically to temperature, humidity, CO2 and O2 concentration per tier in plant factory and to compare the temperature and relative humidity reading pattern between systems installed in the plant factory [13][14][15][16][17].…”