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Effect of Plant Density on the Yield of Hydroponically Grown Heat-Tolerant Tomato under Summer Temperature Conditions

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American Journal of Plant Sciences 2021年第6期12卷 901-913页

作者： Alex Williams Ayarna satoru tsukagoshi George Oduro Nkansah Kazuya Maeda Center for Environment Health and Field Sciences Chiba University Chiba Japan Forest and Horticultural Crops Research Centre School of Agriculture College of Basic and Applied Sciences University of Ghana Accra Ghana National Agriculture and Food Research Organization Tsukuba Japan

Producing enough tomato to meet market demand sustainably has not been feasible in the tropics like Ghana. Attempts to improve production using greenhouse facilities have not addressed the challenge because of high-temperature conditions in the greenhouse, which are difficult to manage. Heat stress, arising from high temperatures, hinder the performance of tomato in terms of fruit set and yield. Moreover, the impending climate change is expected to impose more unfavorable environmental conditions on crop production. An experiment was conducted in (greenhouse at Chiba University, Japan) summer period, which has similar high-temperature conditions like Ghana. This work sought to increase the yield of a heat-tolerant tomato using a state-of-the-art hydroponic system through high-density planting. The outcome of this work was intended for adoption and practice in Ghana. A Heat-tolerant tomato “Nkansah HT” along with Lebombo and Jaguar cultivars, were grown at high and low plant densities (4.1 and 2.7 plants m-2 respectively). Each plant was grown in a low substrate volume culture (0.5 L plant-1) in a recirculating nutrient film technique (NFT) hydroponic system. Parameters measured were plant growth and dry matter assimilation at 12 week

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Human health sciences—From cultivation to utilization of medicinal plants

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Open Journal of Preventive Medicine 2012年第2期2卷 214-224页

作者： Fumio Ikegami Yan Wang Maya Kaneko Megumi Sumino satoru tsukagoshi Center for Environment Health and Field Sciences Chiba University Kashiwa Japan

The aim of this review is to recognize the ability of plants used as food and medicine for our health care. From this point of view, we have studied economical production techniques of medicinal plants and vegetables that have physiological functions such as disease prevention, health maintenance and improvement of physical function. We revealed the suitable cultivation techniques such as the long-term freezing seed storage, and systematic and efficient seedling production of Swertia japonica in the future domestication in Japan. We have also studied the development of a new and friendly product for preparing decoction of Kampo medicine (Japanese traditional medicine) to utilize medicinal plants effectively. It was possible that the decoction of some Kampo medicines in a micro-wavable container could be carried out in substitution for a common method. This study revealed that the improvement of decoction method of Kampo medicine might contribute to conserve the energic or natural resources, especially medicinal plants of crude drugs in comparison with the conventional way. Moreover, the reevaluation of some vegetables such as Japanese radish and carrot in terms of the suitability as materials for “Yakuzen”, and creating and producing of newly low potassium tomatoes for improving the quality of life (QOL) of dialysis patients and potassium restricted patients were also studied by focusing traditional and local vegetables. Some local cultivars containing stronger flavor and taste with higher amount of functional constituents are suitable for our health care than F1 (first filial generation) cultivars. Our research will give feedback each other by cross cutting way, and human health science from the cultivation to utilization of medicinal plants and vegetables will be important and needed for our healthy and comfortable life in the future.

关键词： Kampo Medicine Yakuzen Medicinal Plant Functional Vegetable Low Potassium Tomato

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