Author believed that these studies have had great advances in both theory and practice, guided and promoted for understanding the place and action of rodents in forest ecosystem and making the effective control to forest harmful rodents.
So fromviewpoints of both conserving forest ecosystem and utilizing biological resources，the studies on sustainable developmentand utilization of forest pests should not be ignored.
Author believed that these studies have had great advances in both theory and practice, guided and promoted for understanding the place and action of rodents in forest ecosystem and making the effective control to forest harmful rodents.
So fromviewpoints of both conserving forest ecosystem and utilizing biological resources，the studies on sustainable developmentand utilization of forest pests should not be ignored.
In the present paper,Esterase isozyme zymogram polymorphisms of 22 Beauveria bassianaand 21 Paecilomyces farinosusstrains from the forest Ecosystem were studied by vertical slab Polyacrylamide gel electrophoresis.
Fine roots have enormous surface areas, growing and turning over quickly, which plays an important role in terms of substance cycling and energy flow in the forest ecosystem.
The soil microbial biomass and nutrient status under the native broadleaved forest and Cunninghamia lanceolata plantations at the Huitong National Research Station of Forest Ecosystem (in Hunan Province, midland of China) were examined in this study.
Chemical contents in precipitation change significantly when different kinds of external chemical materials are added, removed, translocated and transformed to or in the forest ecosystem along with precipitation.
Based on the data collected from 31 plots and 93 soil samples, the state of health of the forest ecosystem is discussed and the appropriate FHA age has been determined.
Castanea squinii Dode, an endemic tree widely distributed in China, plays an important role both in chestnut breeding and forest ecosystem function.
More and more forest diseases have made their appearence in Zhejiang province, which has caused enormous losses. The fundamental cause putting the forest diseases out of control lies in the deterioration of the natural forest ecosystem caused by various factors and the failure in establishing one promptly in artifical forests. In the forest disease control practice, the authors esteem it important to persevere in the implementation of the policy "Placing emphasis on prevention while promoting...
More and more forest diseases have made their appearence in Zhejiang province, which has caused enormous losses. The fundamental cause putting the forest diseases out of control lies in the deterioration of the natural forest ecosystem caused by various factors and the failure in establishing one promptly in artifical forests. In the forest disease control practice, the authors esteem it important to persevere in the implementation of the policy "Placing emphasis on prevention while promoting intergrated control" and they explain that, taking the theory of ecology, pathology and economics as its foundation, the forest management as the key step, and bringing into full play all the other control measures is what the intergerated control shoud be. The authers urge in the papre to speed up the tempo of the work on biological control, give play to the functions of the ecosystem of artifical forests on disease control and explore the root causes of new and doubtful diseases to achieve great improvement over the work in the prevention and control of forest diseases.
From three aspects, namely the faunal distribution, ecology and control of harms, this paper made a summary for the studies of forestry redents in the past over thirty years in our country. Author believed that these studies have had great advances in both theory and practice, guided and promoted for understanding the place and action of rodents in forest ecosystem and making the effective control to forest harmful rodents.
This inverstigation, as a part of the plant and animal survey in the project on tropical forest ecosystem in Jianfenling mountain, Hainan Island, was conducted in 1981—1983. About 4000 insects have been collected, of which the Lepidoptera accounts for 50％ and the Coleoptera and Diptera accounts for 13％ and 11％ respectively. The rest belongs to the other 17 orders. Take 26 families of moths for an example, the species of Noctuidae, Geometridae and Pyralidae are the dominant families, which accounts for...
This inverstigation, as a part of the plant and animal survey in the project on tropical forest ecosystem in Jianfenling mountain, Hainan Island, was conducted in 1981—1983. About 4000 insects have been collected, of which the Lepidoptera accounts for 50％ and the Coleoptera and Diptera accounts for 13％ and 11％ respectively. The rest belongs to the other 17 orders. Take 26 families of moths for an example, the species of Noctuidae, Geometridae and Pyralidae are the dominant families, which accounts for 69％ of the total collected moths. One character in population quantity is large in small population and small in large population. There are 17 dominant species, among which 10 species are in pyralidae, 4 species in Hypsidae, 2 species in Arctiidae and 1 species in Uraniidae. Most sp les of Acrdiidae and Pentatomidae have been found in tropical semidecidous monsoon forest and most species of Thrips and Moths in tropical mountainous rain forest. According to the composition of fauna, most species of Thripidae, Phlothripidae, Pentatomidae and Sphingidae are distributed in Oriental region. Some species local species in Hainan Island obtained are Antillothrips flavicornis Zhang, Dinothrips hainanensis Zhang, Agaeus tessellatus Dallas, Dabessus albovittatus Hsiao et Cheng and Rhagastis mongoliana pallicosta Mell. It may be concluded that the charateristics of tropical forest insects are abundant in species, less quantity for each species, more than one generation and no dormancy but diapause for widespread species.
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