An Exceptional Frost Injury to Chinese Pine Stands and of Its Analysis
Yang Cheng (Dept. of Forest Resource Conservatiom)
An exceptional damage to Pinus tabulae for mis Carr. stand by late frost indicated that when the, temperature fall down to -2.7℃ during the vigorous growth stage of primary tender needles, the tips of needles could be injured seriously. The cold endurance of individual plant varit-s considerably. The situation in which damage occur or not was mainly controlled by topogrophical factors (e.g. slope and elevation) . Thus the damaged pine stands distributed in a discontinuous patter.