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.

在低洼地区，由于水涝或土壤含水量过高，甘薯和胡萝卜的块根生长发育普遍较差。胡萝卜根系受土壤通气裸湿低地条件的显着影响。本研究的目的是开发新技术，改善根际土壤通气，以增加热带和亚热带国家潮湿低地地区甘薯和胡萝卜的产量。在本研究的结果中，（i）土壤空气成分得到改善，提供土埂内的稻草、稻壳、稻壳炭等本土植物材料。 (ii) 由于土壤中二氧化碳浓度较低和土埂土壤含水量较低，促进了光合作用，从而促进了甘薯和胡萝卜的生长。结果表明，如果有足够的空气空间，在潮湿的低地条件下甘薯和胡萝卜的生产是可能的使用适当体积的适当材料（例如，宽度为 150 毫米、厚度为 120 毫米的稻壳木炭以未混合的块状形式施用。本研究开发的栽培方法可应用于其他蔬菜作物以及在潮湿低地条件下生长不良的甘薯和胡萝卜即使在已成为荒地的潮湿低地也可以利用。本研究中用于改善土壤通气的本土植物残留物在热带和亚热带国家很容易获得，成本低廉，并且是易于降解的材料。因此，这种耕作方法将有助于建立更好的农业生态系统，实现可持续农业。