Ecology, Environment and Conservation Paper

Vol.12, Issue 3, 2006; Page No.(495-500)

THE EFFECT OF N,P,K FERTILIZERS ON HAND PLANTING PINUS PINEA IN COSTAL OF CASPIAN SEA

M. Razavi, P. Azizi, R. Rashidi and F. Keivan Bebjoo

Abstract

In the coastal of Jafroud, A region in the North East of Khomamcity, Pinus mea trees planted. Early experiment throughout spaying field studies showed that Pinus pinea faced with high lacking of N, P and K elements in this region. A factorial fertilizer plan in the form of randomized complete design with four replications was carried out in this region. Factor 1 was consisted of 3 levels of nitrogen fert. (a,=112, a,=224 and a336 kg N/ ha), factors 2 was consisted of 3 levels of super phosphate fert (b,=56, b,= 112 and b3= 168 kg P205/ ha) and factor 3 was consisted of 3 levels of potassium chloral fert (c22.8, c,=45.6 and c3=68.2 kg K,O/ha). Fertilizing had been carried out in two times, one in August 1999 and the other in March 2000. the purpose was identifying of the effect fertilizers on height, diameter, tree needles and also on the concentration of N, P and K elements on those trees. The results showed that the mixture of N.P.K fertilizers on the growth of height and tree needles has an agreeable effect on them. The highest growth needles and height was in a3b2c2 treatment. There was a high and agreeable correlation between growth tree needles and growth height. The results showed that the main element limiting growth was nitrogen.

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