بررسي تاثير كودهاي مختلف شيميايي و دامي بر رشد نهالهاي بلندمازو در نهالستانهاي كلوده آمل و شهر پشت نوشهر

Effects of different chemical and livestock fertilizers on growth of Caucasian oak seedlings in two nurseries at Caspian Region of Iran.

Two experiments were conducted to determine the effects of N, P and manure fertilizers on growth of Quercus castaneifolia C.A. Meyer in Shahrposht and Koloudeh nurseries (north of Iran). The trial was conducted under factorial statistical method, randomized complete blocks design and three replicates. The factors were Ammonium Sulfate at three levels: 0, 40 and 80 kg/ha), Triple Superphosphate (at three levels: 0, 80 and 120 kg/ha) and manure (at two levels: 0 and 30 T/ha). The shoot (height and collar diameter) and the root (length, diameter and dry weigh) parameters were measured at each plot, using 15 and tree seedlings, respectively. In Shahrposht nursery the height and the collar diameter of the seedlings were not affected significantly by any of the fertilizers. Seedlings growth in Koloudeh nursery was improved in fertilized plots, especially with manure application. The results clearly show that there was significant difference between Koloudeh and Shahrposht nurseries in response to fertilizers.