According to the data of wood analysis and biomass invcstigation, wc analyse the relationship among scotch pine stock, the growth of volume and its density, thc relationship between bio-productivity and its density as...According to the data of wood analysis and biomass invcstigation, wc analyse the relationship among scotch pine stock, the growth of volume and its density, thc relationship between bio-productivity and its density as well as the law of the distribution of biomass of various organs of the scotch pine. The conclusions showcd that the stock, volume, growth, bio produetivity and its density were interrclated closely. The appropriate density was 620--820 individuls / hm2 of mid-aged trees. The distributions of biomass on various organs werc different at different age stage. This paper gave the evidence to value artificial scotch pine, its structures and functions.展开更多
The chloropyll Contents of healthy tree’s’ needles and rusted tree’s needles were measured. The results showed that one-year-old needles in different infection grade had no big differences in the chlorophyll conten...The chloropyll Contents of healthy tree’s’ needles and rusted tree’s needles were measured. The results showed that one-year-old needles in different infection grade had no big differences in the chlorophyll contents. The total chlorophyll contents of two-year-old needles in grad III-IV showed an increasing tendency, while it decreased grade V. The total chlorophyll contens of 3year-old needles in different infection-grades declined with the increase of infection grades. The total chlorophyll content of healthy needles shows an increasing tendency in infection grade II andIV,Which corresponds to the change taldency of two-year-old needles.展开更多
文摘According to the data of wood analysis and biomass invcstigation, wc analyse the relationship among scotch pine stock, the growth of volume and its density, thc relationship between bio-productivity and its density as well as the law of the distribution of biomass of various organs of the scotch pine. The conclusions showcd that the stock, volume, growth, bio produetivity and its density were interrclated closely. The appropriate density was 620--820 individuls / hm2 of mid-aged trees. The distributions of biomass on various organs werc different at different age stage. This paper gave the evidence to value artificial scotch pine, its structures and functions.
文摘The chloropyll Contents of healthy tree’s’ needles and rusted tree’s needles were measured. The results showed that one-year-old needles in different infection grade had no big differences in the chlorophyll contents. The total chlorophyll contents of two-year-old needles in grad III-IV showed an increasing tendency, while it decreased grade V. The total chlorophyll contens of 3year-old needles in different infection-grades declined with the increase of infection grades. The total chlorophyll content of healthy needles shows an increasing tendency in infection grade II andIV,Which corresponds to the change taldency of two-year-old needles.
