A Continuous Leaf Monitoring System for Precision Irrigation Management in Orchard Crops
Öz
Studies have shown that measurement of plant water status (PWS) provides the key
information necessary to implement efficient irrigation management scheme in orchard and
vineyard crops. A pressure chamber is often used to measure PWS. However, this technique is
labor intensive, tedious and time-consuming. To address these issues, we developed a sensor suite
consisting of a thermal infrared (IR) sensor and relevant environmental parameters (ambient
temperature, photosynthetically active radiation (PAR), wind speed and relative humidity) and
tested it extensively in almond, walnut, and grape crops. The system was found to work well in all
three crops. However, this sensor suite was quite bulky and we noticed temporal drifts in the
calibration curve as the season progressed. To address these issues, we developed a continuous
leaf monitoring system that included same sensors as the sensor suite. We have deployed 22 such
leaf monitors in almond and walnut orchards in Nickels Soil Laboratory, Arbuckle, CA, USA and
interfaced them to a wireless mesh network so that data could be uploaded to the internet through
a gateway computer and accessed through the web. The system also included a controller capable
of actuating latching solenoid valves to manage precision irrigation in the orchard. Field data
collected from these experiments were used to calculate daily crop water stress index (CWSI). The
results showed that this system has the potential to be used as irrigation management tool as it
was able to provide daily CWSI values which followed similar pattern as the actual PWS values.
Anahtar Kelimeler
Kaynakça
- Boyer, J.S. 1967. Leaf water potentials measured with a pressure chamber. Plant Physiol. 42(1):133-137 Coates, R. W., M. Delwiche, A. Broad, M. Holler, R. Evans, L. Oki, and L. Dodge. 2012. Wireless sensor network for precision irrigation control in horticultural crops. An ASABE meeting presentation, Paper No: 121337892, St. Joseph, MI. 49085.
- Dhillon R., V. Udompetaikul, F. Rojo, J. Roach, S. Upadhyaya, D. Slaughter, B. Lampinen, and K. Shackel. 2013. Detection of plant water stress using leaf temperature and microclimatic measurements in almond, walnut and grape crops. Trans. ASABE 57(1).
- Idso, S., R. Jackson, P. Pinter, R. Reginato, and J. Hatfield. 1981. Normalizing the stress-degree-day parameter for environmental variability. Agricultural Meteorology. 24:45-55.
- Jones, H. G. 2004. Irrigation scheduling: advantages and pitfalls of plant-based methods. J. Exp. Bot. 55(407):2427-2436.
- Lampinen, B., K. Shackel, S. Southwick, and W. Olson. 2001. Deficit irrigation strategies using midday stem water potential in prune. Irrig. Sci. 20(2):47-54.
- Nielsen, D. 1994. Non water-stressed baselines for sunflowers. Agricultural Water Management. 26(4) 265-276.
- Testi, L., Goldhamer, D., Iniesta, F., and M. Salinas 2008. Crop water stress index is a sensitive indicator in pistachio trees. Irrig. Sci. 26(5):395-405.
- Torman, H. 1986. Canopy temperature as a plant water stress indicator for nectarines. S. Afr. J. Plant Soil. 3(3): 110-114.
Ayrıntılar
Birincil Dil
İngilizce
Konular
-
Bölüm
Araştırma Makalesi
Yazarlar
Rajveer Dhıllon
Bu kişi benim
Francisco Rojo
Bu kişi benim
Jed Roach
Bu kişi benim
Shrini Upadhyaya
Bu kişi benim
Mike Delwıche
Bu kişi benim
Yayımlanma Tarihi
1 Ağustos 2014
Gönderilme Tarihi
15 Mayıs 2014
Kabul Tarihi
9 Temmuz 2014
Yayımlandığı Sayı
Yıl 2014 Cilt: 10 Sayı: 4