In recent years, due to the progress of national economy, people's living standard is also getting higher and higher. However, China's forestry industry is also facing many problems in the process of rapid and...In recent years, due to the progress of national economy, people's living standard is also getting higher and higher. However, China's forestry industry is also facing many problems in the process of rapid and vigorous development, delaying the country's economic and social vigorous development rate. Moreover, the social problems in forestry development are not conducive to the formulation of sustainable economic development strategies. As the seedling raising technology of modern forestry is a systematic technology, the requirements for technicians are also very high. In the modern forestry seedling raising project, seedling raising, afforestation and other activities are considered. Only by further making up for seedling cultivation techniques and afforestation methods can the project meet the needs of the vigorous development of modern forestry projects. Based on this, the requirements of modern forestry seedling raising engineering technology and afforestation plan will be analyzed for reference.展开更多
Wet wood is an abnormal phenomenon in growing trees,which adversely affects growth,subsequent wood processing and economic values of wood products.In this study,the influences of factors such as clones,afforestation m...Wet wood is an abnormal phenomenon in growing trees,which adversely affects growth,subsequent wood processing and economic values of wood products.In this study,the influences of factors such as clones,afforestation methods,site conditions and climate conditions on the characteristics of poplar wetwood were studied through field investigations in 27 clones from 48 sample plots in 28 counties.Results showed that the incidences of wetwood were almost 100%in all plots.Ratios of wetwood area among the48 plots differed from 15.1 to 90.2%.Wetwood area ratios,moisture contents and pH differed significantly between the 27 clones.Wetwood area ratios of the clones ranged from18.7 to 62.3%.Ratios of wetwood areas were positively correlated with wet wood moisture content and pH,tree age,and negatively correlated with pH of sap wood.The repeatability of wet wood area ratios was 0.52,moderately controlled by genetics.Wetwood moisture content and pH were highly controlled by genetics,indicated by the repeatability of 0.91 and 0.89,respectively.There were significant differences in wetwood area ratios,moisture content and pH between different site conditions,afforestation methods,and geographical regions.Sloping land had the lowest wetwood area ratios and moisture content among four types of sites.Afforestation by direct seeding and rooted cuttings had the lowest wetwood area ratios and moisture content,respectively.In the three geographical regions,the Yellow River Basin had the lowest wetwood values of all three factors.展开更多
文摘In recent years, due to the progress of national economy, people's living standard is also getting higher and higher. However, China's forestry industry is also facing many problems in the process of rapid and vigorous development, delaying the country's economic and social vigorous development rate. Moreover, the social problems in forestry development are not conducive to the formulation of sustainable economic development strategies. As the seedling raising technology of modern forestry is a systematic technology, the requirements for technicians are also very high. In the modern forestry seedling raising project, seedling raising, afforestation and other activities are considered. Only by further making up for seedling cultivation techniques and afforestation methods can the project meet the needs of the vigorous development of modern forestry projects. Based on this, the requirements of modern forestry seedling raising engineering technology and afforestation plan will be analyzed for reference.
基金funded by the Hubei Provincial Natural Science Foundation of China (2021CFB446)the National Natural Science Foundation of China (31570665)+1 种基金the National Key Research and Development Program of China (2021YFD2201202)the Fundamental Research Funds for the Central Universities (2662020YLPY017)。
文摘Wet wood is an abnormal phenomenon in growing trees,which adversely affects growth,subsequent wood processing and economic values of wood products.In this study,the influences of factors such as clones,afforestation methods,site conditions and climate conditions on the characteristics of poplar wetwood were studied through field investigations in 27 clones from 48 sample plots in 28 counties.Results showed that the incidences of wetwood were almost 100%in all plots.Ratios of wetwood area among the48 plots differed from 15.1 to 90.2%.Wetwood area ratios,moisture contents and pH differed significantly between the 27 clones.Wetwood area ratios of the clones ranged from18.7 to 62.3%.Ratios of wetwood areas were positively correlated with wet wood moisture content and pH,tree age,and negatively correlated with pH of sap wood.The repeatability of wet wood area ratios was 0.52,moderately controlled by genetics.Wetwood moisture content and pH were highly controlled by genetics,indicated by the repeatability of 0.91 and 0.89,respectively.There were significant differences in wetwood area ratios,moisture content and pH between different site conditions,afforestation methods,and geographical regions.Sloping land had the lowest wetwood area ratios and moisture content among four types of sites.Afforestation by direct seeding and rooted cuttings had the lowest wetwood area ratios and moisture content,respectively.In the three geographical regions,the Yellow River Basin had the lowest wetwood values of all three factors.
