A System to Measure Evapotranspiration of In-ground Container Plants of Mexican Elder

in HortTechnology
View More View Less
  • 1 Department of Agronomy and Horticulture, New Mexico State University, Las Cruces, NM 88003
  • 2 Department of Agronomy and Horticulture, New Mexico State University, Las Cruces, NM 88003.
  • 3 Department of Agronomy and Horticulture, New Mexico State University, Las Cruces, NM 88003.
  • 4 Department of Mechanical Engineering, New Mexico State University, Las Cruces, NM 88003.

Accurate measurement of evapotranspiration (ET) is difficult and expensive for large, in-ground container (pot-in-pot) plants. We engineered and used a simple and inexpensive system to determine evapotranspiration of in-ground container trees. The system was shop-assembled and used a block and tackle system attached to a collapsible tripod. A unique container harness system attached to the block and tackle system was used to lift containers that were sunken in the ground. Containers were weighed with a battery-operated balance that was accurate to 1 g (0.04 oz) at its maximum load capacity of 60 kg (132.3 lb). One person operated the system, and the weight of the system exclusive of the balance was 17.5 kg (38.50 lb). Gravimetric water use data obtained with the system werecombined with meteorological data to compute crop coefficients (Kc) of mexican elder (Sambucus mexicana). The system detected small changes in daily water use of mexican elder trees grown in 76-L (20-gal) in-ground containers. Crop coefficients ranged from 0.17 to 0.71. The acquisition of evapotranspiration data from relatively large, containerized landscape plants may be facilitated because the system is simple, inexpensive, and accurate.

If the inline PDF is not rendering correctly, you can download the PDF file here.

Contributor Notes

e-mail rsthilai@nmsu.edu
All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 80 15 1
PDF Downloads 75 45 2