China has a vast land and rich resources. Due to the large population in China, the per capita possession of resources is relatively low. We should strengthen the protection of existing resources and improve the utili...China has a vast land and rich resources. Due to the large population in China, the per capita possession of resources is relatively low. We should strengthen the protection of existing resources and improve the utilization rate of resources. In recent years, it has been paid attention to by relevant departments. The scale of forestry in China is gradually expanding in the process of economic development, which brings some difficulties to the work of forest resource management departments and improves the difficulty of management work. Strengthening the quality of forestry investigation and planning design can effectively promote the development of China's social economy, but also conducive to the development of ecological environmental protection work. Based on the specific situation of forest resources protection and management in Xinjiang, this paper introduces the local forestry investigation, planning and design and forest resources protection content firstly, and analyzes its role in forest resources protection, management and utilization, and puts forward relevant countermeasures, for reference only.展开更多
Wetland soil quality degradation caused by large-scale agricultural reclamation on the Sanjiang Plain of Northeast China has been widely reported. A relative soil quality evaluation (RSQE) model and a projection pursu...Wetland soil quality degradation caused by large-scale agricultural reclamation on the Sanjiang Plain of Northeast China has been widely reported. A relative soil quality evaluation (RSQE) model and a projection pursuit evaluation (PPE) model based on real-coded accelerating genetic algorithm were introduced to evaluate quality variations in top layers of the main wetland soils on the Sanjiang Plain in 1999 and 2003, respectively. As soil quality degradation boundaries were vague, this study established two fuzzy synthetic evaluation (FSE) models based on the original data and criteria used in the RSQE and PPE models. The outputs of the two FSE models were obtained by choosing two fuzzy composite operators M(∧, ∨) and M(·, ⊕). Statistical analysis showed that the results of the FSE, RSQE, and PPE models were correlated. In particular, outputs of the FSE model using M(·, ⊕) were significantly correlated with those of the RSQE model with r = 0.989 at P < 0.01. Compared with RSQE and PPE models, the FSE model may be more objective in showing soil quality variations and was closer to the natural situation, showing the feasibility and applicability of the FSE model in evaluating soil quality degradation. However, the choice of composite operator was of critical importance. The study of wetland soil quality degradation on the Sanjiang Plain was of scientific and practical significance for protection and management of soils and for sustainable development of agriculture in this area in the future.展开更多
文摘China has a vast land and rich resources. Due to the large population in China, the per capita possession of resources is relatively low. We should strengthen the protection of existing resources and improve the utilization rate of resources. In recent years, it has been paid attention to by relevant departments. The scale of forestry in China is gradually expanding in the process of economic development, which brings some difficulties to the work of forest resource management departments and improves the difficulty of management work. Strengthening the quality of forestry investigation and planning design can effectively promote the development of China's social economy, but also conducive to the development of ecological environmental protection work. Based on the specific situation of forest resources protection and management in Xinjiang, this paper introduces the local forestry investigation, planning and design and forest resources protection content firstly, and analyzes its role in forest resources protection, management and utilization, and puts forward relevant countermeasures, for reference only.
基金Project supported by the National Natural Science Foundation of China (No. 40830535)the National Key Technology R&D Program of China (No. 2007BAC30B02)the Scientific Program of Department of Education, Hebei Province,China (No. Z2008102)
文摘Wetland soil quality degradation caused by large-scale agricultural reclamation on the Sanjiang Plain of Northeast China has been widely reported. A relative soil quality evaluation (RSQE) model and a projection pursuit evaluation (PPE) model based on real-coded accelerating genetic algorithm were introduced to evaluate quality variations in top layers of the main wetland soils on the Sanjiang Plain in 1999 and 2003, respectively. As soil quality degradation boundaries were vague, this study established two fuzzy synthetic evaluation (FSE) models based on the original data and criteria used in the RSQE and PPE models. The outputs of the two FSE models were obtained by choosing two fuzzy composite operators M(∧, ∨) and M(·, ⊕). Statistical analysis showed that the results of the FSE, RSQE, and PPE models were correlated. In particular, outputs of the FSE model using M(·, ⊕) were significantly correlated with those of the RSQE model with r = 0.989 at P < 0.01. Compared with RSQE and PPE models, the FSE model may be more objective in showing soil quality variations and was closer to the natural situation, showing the feasibility and applicability of the FSE model in evaluating soil quality degradation. However, the choice of composite operator was of critical importance. The study of wetland soil quality degradation on the Sanjiang Plain was of scientific and practical significance for protection and management of soils and for sustainable development of agriculture in this area in the future.
