Document Type : Research Paper
Author
Msc. in Agronomy, Plant Nutrition Office, Agricaltural Jihad Organization, Kerman, Iran
Abstract
In order to evaluate organic phosphorus fertilizer and phosphorus biofertilizer Barvar 2, as a substitute for chemical P fertilizers in wheat production, an experiment was conducted during two growing seasons of 2005-06 and 206-07, in a field in Bardsir city, Kerman Province, using a randomized complete block design with 12 treatments and 3 replicates. Treatments were T1=150 kg/ha organic P fertilizer + 100gr Barvar 2, T2=100 kg/ha organic phosphorus fertilizer +100gr Barvar 2, T3=50 kg/ha organic phosphorus fertilizer + 100 gr Barvar 2, T4=50 kg/ha organic phosphorus fertilizer,T5=100 kg/ha organic P fertilizer, T6=150 kg/ha organic phosphorus fertilizer,T7=50 kg/ha triple super phosphate + 100gr Barvar 2 ,T8=100 kg/ha triple super phosphate + 100gr Barvar 2, T9=150 kg/ha triple super phosphate + 100gr Barvar 2, T10=50 kg/ha triple super phosphate,T11=100 kg/ha triple super phosphate and T12=150 kg/ha triple super phosphate. The measured properties were: grain yield, ears/m2, grains per ear, thousand kernel weight and soil phosphorus after harvest. According to the results, the highest yield (8477 kg/ha) was obtained by application of Barvar 2 together with 150kg/ha organic phosphorus fertilizer, which showed a yield increase of 58.4% in comparison with the control treatment i.e. 50 kg/ha triple super phosphate(T10) (local practice based on soil analysis). The highest yield components measured were 43.3 gr thousand kernel weight, 466ears/m2, and 47.67 grains per ear in treatment T1, which, in comparison with the control, showed an increase of, respectively, 28.3%, 39.2% and 32.9%. The highest phosphorus fixation in soil was 9.78 mg/kg and belonged to the treatment of 150 kg/ha triple super phosphate(T12), which had no significant difference with treatments T11
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