Development of an automatic watering system for plug seedling production with estimation of evapotranspiration by weighing

被引：2

作者：

Shibuya, T ^{[1
]}

Nakahara, M ^{[1
]}

Kozai, T ^{[1
]}

机构：

[1] Chiba Univ, Fac Hort, Chiba 2718510, Japan

来源：

PROCEEDINGS OF THE XXV INTERNATIONAL HORTICULTURAL CONGRESS, PT 9: COMPUTERS AND AUTOMATION ELECTRONIC INFORMATION IN HORTICULTURE | 2000年 / 519期

关键词：

ebb and flood; integrated evapotranspiration; soil-mix moisture;

D O I：

10.17660/ActaHortic.2000.519.2

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

An automatic watering system for controlling the moisture level of soil-mix in a plug tray was developed and used for tomato plug seedling production. Plug trays with a volume of 1.4 L/tray were used for the experiment. The plug sheets were placed on a bench with an ebb-and-flood circulating watering system. A plug sheet at the center of the bench was weighed with an electric balance by suspending it from a steel frame. When the amount of integrated evapotranspiration of the plug sheet estimated from a decrease in weight of the plug sheet reached over a setpoint of 500 g/tray during the daytime, all the plug sheets were watered from below. After the water in the bench was drained, the amount of integrated evapotranspiration was reset to zero. In this way, fluctuations in the moisture level of the soil-mix were controlled within the range of the setpoint during the experiment period.

引用

页码：37 / 42

页数：6