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A new cultivation method, based on a concept of hydroponics, for vegetable crop production under wet lowland field conditions in Southeast Asia

一种基于水培概念的新栽培方法，适用于东南亚潮湿低地田间条件下的蔬菜作物生产

基本信息

批准号：
09660281
负责人：
KITAYA Yoshiaki
金额：
$ 2.11万
依托单位：
Osaka Prefecture University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09660281/
关键词：
Hydroponics Wet lowland Vegetable cultivation Sweetpotato Carrot Soil aeration 塊根成長可食部比率有機質材料

项目摘要

The tuberous roots of sweetpotato and storage roots of carrot have generally showed poor growth and development in low-lying areas due to water logging or excess moisture content of the soil In the present study, the growth and development of the tuberous roots of sweetpotato and storage roots of carrot were significantly influenced by the soil aeration nuder wet lowland conditions. The present study was then, conducted to develop new techniques to improve the rhizosphere soil aeration for increasing sweetpotato and carrot production under wet lowland areas in tropical and subtropical countries.In the result of the present study, (i) soil air composition wasimproved with providing the indigenous plant materials like rice straw, rice husk and rice husk charcoal inside the soil ridges. (ii) photosynthesis arid thus growth of sweetpotato and carrot was promoted due to lower carbon dioxide concentration in the soil and lower soil water content of the soil ridges.It is revealed that sweetpotato and carrot production under wet lowland conditions is possible if sufficient air spaces are provided inside the soil ridges using an appropriate volume of appropriate materials, e.g. a width of 150 mm and thickness of 120 mm of rice husk charcoal applied in the unmixed mass form.The cultivation method developed in the present study can be applied to other vegetable crops as well as sweetpotato and carrot which show poor growth under wet lowland conditions and can be utilized even in wet lowlands that have been left as wasteland.The indigenous plant residues used in this study to improve soil aeration are easily available with low cost in tropical and subtropical countries and easily degradable materials. Therefore, this cultivation method would contribute to establish the better agro- ecosystem for sustainable agriculture.

甘薯块根和胡萝卜贮藏根在低洼地区由于土壤淹水或水分超标而普遍表现出生长发育不良。本研究在湿润的低地条件下，土壤通气性对甘薯块根和胡萝卜贮藏根的生长发育有显著影响。在此基础上，研究了改善根际土壤通气性以提高热带和亚热带低湿地区甘薯和胡萝卜产量的新技术。本研究的结果是：(1)土壤空气组成得到改善，在土壤垄内提供稻草、稻壳和稻壳炭等本地植物材料。(Ii)由于土壤中二氧化碳浓度较低，土壤水分含量较低，促进了甘薯和胡萝卜的光合作用和生长。研究表明，在潮湿的低地条件下，如果使用适当的材料在土脊内提供足够的空气空间，甘薯和胡萝卜的生产是可能的，本研究开发的栽培方法可应用于其他蔬菜作物以及甘薯和胡萝卜，这些作物在潮湿的低地条件下生长不佳，即使在作为荒地的潮湿低地也可以利用。本研究中使用的用于改善土壤通气性的本土植物残留物在热带和亚热带国家很容易获得，成本低，而且容易降解。因此，这种栽培方法将有助于建立更好的农业生态系统，实现农业可持续发展。