التفاصيل البيبلوغرافية
| العنوان: |
THE EFFICIENT USE OF WATER AND FERTILIZER RESOURCES IN A FERTIGATION PLANT. |
| المؤلفون: |
Cârlescu, Petru-Marian, Matache, Gabriela, Sovaiala, Gheorghe, Tudor, Mirela, Marinescu, Alexandru |
| المصدر: |
Proceedings of the International Multidisciplinary Scientific GeoConference SGEM; 2016, Vol. 1, p727-734, 8p |
| مصطلحات موضوعية: |
FERTIGATION, WATER efficiency, WATER supply, FRUIT growing, SOIL fertility, FLUID flow |
| مستخلص: |
This paper presents a simulation of a fertigation plant used in fruit growing with the purpose of studying the distribution of fertilizer over the entire plant. Increasing soil fertility in current intensive farming requires the use of modern solutions for the application of fertilizers along with the irrigation water (fertigation) in order to preserve water resources and prevent loss of fertilizing substance. The method used is based on mathematical models which have successfully addressed to simulate fluid flow in pipelines. The CFD (Computational Fluid Dynamics) simulation of water flow in the fertigation plant was considered turbulent, and the model applied k-e. The fertigation plant used in simulation has 20 pipes with 800 droppers, and the inner diameter of a dropper is 0.8 mm. The diffusion of fertilizing solution in the irrigation water is difficult to monitor because of extremely low levels of concentration and variation depending on pressure along the network of pipelines. The CFD simulation was based on the assumption that the fertilizer is in the form of solid spherical grains with a diameter of 100 µm, and this fertilizer does not chemically interact with water. In this way there is provided hydraulic conveyance of particles from the main irrigation pipe to the dropper. The simulation results are presented in the shape of velocity fields and respectively as a trajectory of the fertilizer particles in the fertigation plant. By analyzing the trajectory and the manner in which the fertilizer particles disperse at the level of those 800 droppers there has been found unevenness of distribution. Thus a rate of 15% of the fertigation pipes has fertilizer at all 40 droppers. The rest of pipes have a lesser or greater proportion of droppers receiving fertilizer. Moreover, the distribution of fertilizer particles is made unevenly in the droppers in the first half of the plant compared to the last half. The advantage of a three-dimensional simulation of water flow and movement of fertilizer particles is that it provides an overview as close as possible to the real fertigation process taking place in a grove of fruit tree. [ABSTRACT FROM AUTHOR] |
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