S138 : Simulation of potassium movement in soil with green pepper planting
Thesis > Central Library of Shahrood University > Agricultural Engineering > MSc > 2013
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Abstarct: Sustainability of agriculture requires proper management of water and fertilizer in
agricultural fields. Nowadays fertigation system is the effect method of application of
nutrients and water for plants. This research has been conducted in Bastam Agricultural
Center for evaluation of fertigation elements with studying potassium movement,
potassium leaching and drainage water with modeling approach. Selected crop was
green peeper and selected model was Hydrus-2D. Soil texture of experimental field was
sandy loam. A complete drip fertigation system with 1 centimeter diameter lateral and 4
l/h emitter discharge developed in field. Results of research showed that average crop
yield in drip fertigation treatments was 47 t/h which was 51 percent more than yield of
basin irrigation system. Simulation of potassium movement in soil laxyers showed that
maximum amount of distributed potassium concentrated in middle soil laxyers
corresponding crop root zone development in whole crop growth season. Potassium
leaching estimated with two method of weekly fertigation 10 minute before and after
fertigation. Results of potassium leaching study reveled that in weekly fertigation 10
minutes before irrigation method, potassium leaching was 3.5 percent less than another
method. Another result showed that in fertigation system potassium leaching was 32
percent less than basin irrigation. The last result of research reveled that drainage water
below crop root zone in basin irrigation was 55 percent of distributed water but in
fertigation system it was only 2 percent indicating drainage water of basin irrigation was
such more comparison with drip fertigation system.
Keywords:
#Fertigation #simulation #potassium leaching Link
Keeping place: Central Library of Shahrood University
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Keeping place: Central Library of Shahrood University
Visitor: