The results showed that the total value of ecosystem service of nature forest in Fujian Province was estimated to be 74.35×10~8USD/a, in which the ecological, economic and social values accounted for 75.00%,19.32% and 5.68%, respectively.
the diversity of community in the altitude of 1 850 m>in the altitude of 1 650 m>in the altitude of 2 050 m in the nature forest ,And the diversity was declining with the altitude increasing in planted forest;
Natural forest conservation hierarchical program with neural network
Interspecific relationships in a natural forest dominated by Pinus kwangtungensis, a rare and endangered pine species endemic to China, were studied based on inventory data from 7,200 m2 plots in Nanling National Nature Reserve.
Comparing the two years before and after the implementation of Natural Forest Protection Program (NFPP) with the five years, the mean va1ue of FPF and FEF reduced by 0.341 (46.32%) and 0.327 hm2 per capita (54.94%), respectively.
The amount of microbial carbon in the long-plowed horizon was 40% of its content in the upper horizon of natural forest.
Under the fallow, the restoration of this ratio to the values typical of the soil under natural forest cenoses takes place.
Although the RENIs of plantations in rehabilitated fields are a little lower than those of natural forests, they are higher than those of cultivated crops.
We studied 10-to 27-year-old artificial forests on rehabilitated lands in the upper reaches of the Yellow River with the objective of comparing the carbon densities of various artificial and natural forests.
The ratios of carbon density among vegetation, litter, and soil pools were 39.6:1.8:58.6 for artificial forests and 57.4:2.7:39.9 for natural forests.
We conclude that natural forests should not be protected in the FHA way after 45 years.
The results show that, in natural forests, structural diversity of pioneer communities is much lower than in late successive communities.