Closed and recycling syslematization on hydroponics

水培封闭循环系统化

• 批准号: 12660227
• 负责人: SHIGA Tohru
• 金额: $ 2.11万
• 依托单位: Utsunomiya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12660227/
• 关键词: Hydroponics; Organic culture medium; water circulation; 3 phase distribution; Komatsuna; root area control; 吸水特性

We tried to use the bark culture medium called as "Bark de Green" as the organic culture medium in place of the rockwool, and designed control system of root area environment of plant, which aimed at the circulation and re-use of cultivating nutrient water.The bark consisted of Japan ceder and Japanese cypress was divided to 2 classes of under 10 mm and over 10 mm by size, and 6 categories were made by the mixing rate of the bark size. The physical properties of bark culture medium were measured on 3 phase distributions, density, and water content. Also tomato and komatsuna were cultured in capillary watering system.1. As the ratio of bark under 1 mm increased, solid phase and liquid phase increased, and then gas phase decreased. As compared with rockwool, the liquid phase was low, and decreased as pF value was higher from pF 1.0. But the bark had as same liquid phase as rockwool below pF 0.9 when the ratio of size under 1 mm was more than 80 %. Water holding performance of bark culture medium was lower than that of rockwool.2. In tomato culture, there ware no obvious differences in growth between the bark culture medium with 80 % or under of ratio of bark under 1 mm and rockwool. Therefore the bark with those sizes was as useful as rockwool in growth of tomatoes.3. In komatsuna culture, its growth was good at the bark with the size under 1 mm and rockwool at 20 cm height of culture medium. Early growth was lower at the bark size over 1 mm. At the 10 cm height of culture medium bark on the market without size sorting was good balance between liquid and gas phases, and indicated stable growth of komatsuna.4. The capillary watering system showed the better growth than drip irrigation system at komatsuna culture using organic culture medium, and proved to have high practical use for simple and cheap watering system.

尝试用树皮绿色培养基代替岩棉作为有机栽培基质，设计了以栽培营养水循环和再利用为目标的植物根区环境调控体系，将日本柏木和日本扁柏的树皮按大小分为10 mm以下和10 mm以上2类，按树皮大小的混合率分为6类。测定了树皮培养基的三相分布、密度和含水量等物理性质。番茄和小松菜在毛细供水系统中也进行了培养.随着1mm以下树皮比例的增加，固相和液相含量增加，气相含量减少。与岩棉相比，其液相含量低，且从pF 1.0开始，随着pF值的增加而降低。当1mm以下粒径的树皮占80%以上时，其液相与岩棉的液相在pF0.9以下基本相同。树皮基质的持水性能低于岩棉基质.在番茄栽培中，1mm以下树皮比例不超过80%的树皮培养基与岩棉培养基的生长量无明显差异。因此，这些大小的树皮在番茄生长上与岩棉一样有用.在小松菜栽培中，生长良好的部位是1mm以下的树皮和20cm高的岩棉。树皮尺寸大于1 mm时，早期生长较低，在10 cm高度的市售培养基中，未进行尺寸分选的树皮液气相平衡较好，表明小松菜生长稳定.在使用有机培养基的小松菜栽培中，毛管灌溉系统比滴灌系统表现出更好的生长，并且证明了简单而廉价的灌溉系统具有较高的实用性。