Abstarct: In order to investigate the effect of biological fertilizer Nitrokara and Composted Azolla on performance of phosphorus absorption, yield and yield components of the rice and borer worm population, a field experiment was performed in Rasht Rice Research Center. Factorial experiment in a format Randomized complete block design with 3 replications was conducted. Treatments were included two levels of biological fertilizer Nitrokara not consumption (N0) and consumption 100 g in 150 shrub(N1) and two levels Composted Azolla not consumption (A0) and consumption the amount 5 tons per hectare (A1) and three levels of phosphorus fertilizer source of triple superphosphate not consumption (S0), consumption 50 (S1) and 100 kg per hectare (S2). Urea fertilizer amount of 120 kg per hectare also potassium fertilizer source of Potassium sulfate amount of 100 kg per hectare, was given before and after planting to all plots. The results of this research showed concurrent consumption Composted Azolla and biological fertilizer Nitrokara increased seed hollow weight in cluster amount of 8/2g While minimum seed hollow weight was obtained with consumption Composted Azolla consumed and no Nitrokara amount of 4/43 g. It seems that concurrent consumption of two treatments have negative effect on seed rice but separate application of each of these treatments cause to decrease amount of seed hollow and increase of filled grain and finally increase the rice yield. The average comparison of soil available phosphorus showed the effects of bilatral, Nitrokara use and amount of 100 kg per hectare triple superphosphate fertilizer and the effects of tripartite, Composted Azolla, Nitrokara and 100kg per hectare triple superphosphate had the most influence on available soil phosphorus respectively 13 and 13/73ppm. larva borer worm population, before and after of the rice heading was the most amount in effect of combined application of treatments Composted Azolla and Nitrokara but in effect not used two treatments Nitrokara and also not used 50 kg per hectare triple superphosphate had minimum number. Considering that the aim of this study is to reduce the population of the stem borer worms, it is recommended that 50 kg per hactar triple superphosphat. Combination of Azolla compost, Nitrokara and triple superphosphat treatments has been effective on the capability absorption soil phosphorus