Evaluation amounts of phosphorous fertilizer on use efficiency and yield of six Rice varieties in Khuzestan province in transplanting condition.
2006
Gilani, A`bd Ol-A`li | Jalali, Sami | Hardani, Jabbar | Musavi Fazl, Mohammad Hadi
In order to determination of suitable and highest Phosphate fertilizer efficiency in Khuzestan of rice varieties, an experiment was conducted as randomized complete block in split plot design, using three replication in Shavoor agriculture research station for three years (1380-1382).Varieties were as main plot and Phosphate levels were subplots, in first of two years the experiment carried out with five varieties but in last year variety number was added to six by accompanied of line6 but for doing of pooled analysis of variance, main plots included five varieties (red anbori 1,2,Champa 6,16 and LD183 and subplots were Phosphate levels (0,25,50,75 kg/ha P2O5) of super Phosphate triple source. The results showed that year and other sources of variation have high significant on grain yield. The highest yield related to tired year and LD183 with mean of 5653 and 6231,respectively.in comparison with check, grain yield increased for %15 accompanied by adding fertilizer. third and second year had the most of biomass and so local varieties had the more biomass than LD183.The trend of biomass variations were increaser until P=25 kg/ha and then reduced. Third year and LD183 had the most of harvest index and between of Phosphate level, 25 kg/ha had more harvest index than others. Local varieties had lower tiller number than LD183 and maximum tiller produced in 68 days of transplanting. In between of Phosphate levels, tiller number increased accompanied by adding of fertilizer. The maximum filler produced on 48 days of transplanting. The agronomic efficiency reduced severely when fertilizer added in all of varieties obtained highest agronomic efficiency in P=25 kg/kg. The most of the Physiologic efficiency related to P=75 with mean of 923 kg/kg, but the highest appearance recovery efficiency and Phosphate use efficiency produced in P=25kg/kg. In according of experiment results, using of P=25 kg/ha is recommended able.
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