Ecological factors affecting the kernel productivity of stone pine (Pinus pinea L.) in different forest sites of Syria

This study was carried out at three different forest sites in Syria in order to determine the effect of changing rainfall, temperature and soil on kernel productivity of stone pine (Pinus pinea L.)> these sites included: Jabal Alnabi Mata, (Tartous province, L1), Dahr Alkhoser (Homs province, L2) and E′en Jron site (Idleb province, L3). Results showed that kernel productivity of stone pine per tree was 236.3, 252.8, 143 g per tree, and 177, 162.3, and 86.98 kg per hectare in L1, L2, and L3, respectively. These differences were attributed due to the variation in the composition, textured and fertility of the soil available in the three locations studied. It was concluded that trees of stone pine grow better and superior in Kernel productivity in humid and super-humid bioclimatic zone.