The effect of solitary and combined application of organic and biological manure and chemical fertilizer on some of the qualitative and quantitative properties of sugar beet

In order to study the effect of solitary and combined application of two types of green manure, cow manure, Barvar-2 phosphate fertilizer and conventional chemical fertilizer on some of the qualitative and quantitativeproperties of sugar beet, an experiment was conducted at the research farm of Shahrekord University in 2013. The experimental design was randomized in a complete block design with three replications and 12 treatments including: 1- control, 2-Pisum + Triple Super Phosphate (TSPh), 3-Lathyrus + TSPh, 4-Barvar-2 phosphate + Urea, 5-Cow manure (Cm) + TSPh, 6-Conventional manure, 7-Pisum + Barvar-2 phosphate, 8- Lathyrus + Barvar- phosphate 2, 9-Pisum + Cm + TSPh, 10-Lathyrus + Cm + TSPh, 11-Pisum + Cm + Barvar-2 phosphate and 12-Lathyrus + Cm + Barvar-2 phosphate. The results showed that fertilizer treatments had a significant effect on root yield, sugar yield, white sugar yield and harmful nitrogen whereas combined treatments of 8, 10, 11 and 2 had the highest means for root yield, sugar yield and white sugar yield. Application of green manure, farm yard manure and their combinations along with Barvar phosphate biological fertilizer increased root yield of sugar beet between 10-18 and 32-68 percent compared with conventional chemical fertilizer and control, respectively. The lowest amount of harmful nitrogen was related to the treatments of 10 and 11. From the viewpoint of the other studied traits, combined treatments of organic and bio-fertilizers were quite acceptable.