Development and application of a sensitive, high precision weighing lysimeter for use in greenhouses

A high precision weighing lysimeter for measuring evapotranspiration in greenhouses was developed. The instrument has a measurement of sensitivity of one part in 106, that is one order of magnitude better than any other so far described in the literature. With it, evaporation rates in a greenhouse, even at night, can be measured on a one minute time scale. Development and construction of the instrument are described and measurements of the transpiration of a tomato crop in a greenhouse are used to demonstrate its capabilities.

[1]  C. H. M. van Bavel,et al.  The fluid-roof solar greenhouse: Energy budget analysis by simulation. , 1981 .

[2]  A. T. Cate,et al.  Modelling and (adaptive) control of greenhouse climates , 1984 .

[3]  Y. Hashimoto,et al.  COMPUTER CONTROL OF SHORT TERM PLANT GROWTH BY MONITORING LEAF TEMPERATURE , 1980 .

[4]  S. Timoshenko,et al.  THEORY OF PLATES AND SHELLS , 1959 .

[5]  E. V. Collins.  Tandem Tractor Features , 1959 .

[6]  R. D. Graaf.  Onderzoek naar de waterhuishouding in het bijzonder het waterverbruik bij een teelt van stooktomaten in 1977 , 1978 .

[7]  J. Meijer,et al.  Reduction of Heat Losses from Greenhouses by Means of Internal Blinds with Low Thermal Emissivity , 1980 .

[8]  W. B. Goddard,et al.  A Water-Level Measuring System for Determining Evapotranspiration Rates from a Floating Lysimeter. , 1967 .

[9]  W. O. Pruitt,et al.  Large Weighing Lysimeter for Measuring Evapotranspiration , 1960 .

[10]  Ernest Otto Doebelin,et al.  Measurement Systems Application and Design , 1966 .

[11]  G. Bot.  Greenhouse climate: from physical processes to a dynamic model , 1983 .

[12]  Joe T. Ritchie,et al.  A Precision Weighing Lysimeter for Row Crop Water Use Studies1 , 1968 .

[13]  R. D. Graaf,et al.  TRANSPIRATION AND EVAPOTRANSPIRATION OF THE GLASSHOUSE CROPS , 1981 .

[14]  A. J. Udink ten Cate,et al.  Computer control of greenhouse climates , 1978 .

[15]  G. Slack,et al.  Seasonal variation in the transpiration of glasshouse plants , 1966 .

[16]  P. Hopmans,et al.  IN SITU PLANT WATER RELATIONS MONITORING FOR GREENHOUSE CLIMATE CONTROL WITH COMPUTERS , 1981 .