The construction of expressway and high-speed rail is at the sacrifice of the soil ecological environment. It brings about much damaged land and bare slope. It is necessary to restore vegetation and rebuild landscape....The construction of expressway and high-speed rail is at the sacrifice of the soil ecological environment. It brings about much damaged land and bare slope. It is necessary to restore vegetation and rebuild landscape. In the design of target plant community and configuration plants,it is required to select as far as possible plants that can blossom and bear fruit or pods. Then seeds of these plants can be harvested,processed and sold,and applied for other projects,so as to develop into a complete forest and grass seed industry chain. This not only reasonably utilizes land resources,but also provides a new approach to the problem of insufficient fine forest seed sources in China. This paper discussed the use of land resources in road side slope and forest and grass seed selection and breeding technology,and elaborated the industrialized development paths for forest and grass seed industries in road side slope. Finally,it arrived at following recommendations.( i) The construction of forest and grass industry economic belt using land resources in road side slope can realize maximum land value. Building a road can help people there get rich,and the type of land and water cultivates its type of forest and grass.( ii) It can make up for the losses incurred from construction of expressway and high-speed rail or destroying forest land,and it can increase farmers' income.( iii) It can increase the supply of domestic seeds,reduce seed import,save foreign exchange,and partly solve the problem of insufficient supply of forest and grass seeds.( iv) It is able to form a complete forest and grass seed industry economic cycle chain,increase employment,and provide new approaches for enriching and benefiting farmers.展开更多
According to the unification principle of system structure and system function of the Water Resource Conservation Forests,seven factors were selected from stand spatial structure,trees structure and healthy of woods,t...According to the unification principle of system structure and system function of the Water Resource Conservation Forests,seven factors were selected from stand spatial structure,trees structure and healthy of woods,the multifunction management optimization model target was confirmed by using nonlinearity multi-objective programming approach, and the target function-stand spatial structure homogeneity index was defined to establish spatial optimization models with restraining conditions set up in diversity of stand structure and spatial structure.The spatial structure of available typical stand in the wet land area in southern Donting Lake was optimized by means of selective cutting and reinforcement planting.The results showed that the spatial structure was improved obviously and trees diversity and stand health were not weakened.It’s suggested that the established optimization model can effectively guide multifunction management,stand structure optimization and the steadiness of ecological ecosystem and it is convenient and operable in practice,and it’s very important to protect and recover ecosystem of Water Resource Conservation Forests.展开更多
文章提出了基于Sentinel-2A密集时序的山区林草资源自动分类方法。在GEE云计算平台支持下,首先基于Sentinel-2A影像计算年度NDVI密集时间序列;然后利用HANTS谐波分析对年度NDVI进行时序重构,获得年度完整的NDVI时序特征谱;在此基础上构...文章提出了基于Sentinel-2A密集时序的山区林草资源自动分类方法。在GEE云计算平台支持下,首先基于Sentinel-2A影像计算年度NDVI密集时间序列;然后利用HANTS谐波分析对年度NDVI进行时序重构,获得年度完整的NDVI时序特征谱;在此基础上构建随机森林分类模型,通过特征计算和优选,完成影像分类和精度评价;并以大别山西麓麻城市为研究区开展了实验研究。实验结果表明:时序谐波分析方法能够有效地区分林草资源及森林亚类,时序谐波特征支持下Sentinel-2A密集时序林草资源遥感分类总体精度较高,相比传统多期分类、现有的全球30 m GLC_FCS30-2020分类产品,OA和Kappa均有了一定的提高。展开更多
基金Supported by National Spark Plan Project(2010GA781004)Science and Technology Planning Project of Shenzhen(GCZX2015051514435234,CXZZ20150527171538718,and CXZZ20140422142833835)
文摘The construction of expressway and high-speed rail is at the sacrifice of the soil ecological environment. It brings about much damaged land and bare slope. It is necessary to restore vegetation and rebuild landscape. In the design of target plant community and configuration plants,it is required to select as far as possible plants that can blossom and bear fruit or pods. Then seeds of these plants can be harvested,processed and sold,and applied for other projects,so as to develop into a complete forest and grass seed industry chain. This not only reasonably utilizes land resources,but also provides a new approach to the problem of insufficient fine forest seed sources in China. This paper discussed the use of land resources in road side slope and forest and grass seed selection and breeding technology,and elaborated the industrialized development paths for forest and grass seed industries in road side slope. Finally,it arrived at following recommendations.( i) The construction of forest and grass industry economic belt using land resources in road side slope can realize maximum land value. Building a road can help people there get rich,and the type of land and water cultivates its type of forest and grass.( ii) It can make up for the losses incurred from construction of expressway and high-speed rail or destroying forest land,and it can increase farmers' income.( iii) It can increase the supply of domestic seeds,reduce seed import,save foreign exchange,and partly solve the problem of insufficient supply of forest and grass seeds.( iv) It is able to form a complete forest and grass seed industry economic cycle chain,increase employment,and provide new approaches for enriching and benefiting farmers.
文摘According to the unification principle of system structure and system function of the Water Resource Conservation Forests,seven factors were selected from stand spatial structure,trees structure and healthy of woods,the multifunction management optimization model target was confirmed by using nonlinearity multi-objective programming approach, and the target function-stand spatial structure homogeneity index was defined to establish spatial optimization models with restraining conditions set up in diversity of stand structure and spatial structure.The spatial structure of available typical stand in the wet land area in southern Donting Lake was optimized by means of selective cutting and reinforcement planting.The results showed that the spatial structure was improved obviously and trees diversity and stand health were not weakened.It’s suggested that the established optimization model can effectively guide multifunction management,stand structure optimization and the steadiness of ecological ecosystem and it is convenient and operable in practice,and it’s very important to protect and recover ecosystem of Water Resource Conservation Forests.
文摘文章提出了基于Sentinel-2A密集时序的山区林草资源自动分类方法。在GEE云计算平台支持下,首先基于Sentinel-2A影像计算年度NDVI密集时间序列;然后利用HANTS谐波分析对年度NDVI进行时序重构,获得年度完整的NDVI时序特征谱;在此基础上构建随机森林分类模型,通过特征计算和优选,完成影像分类和精度评价;并以大别山西麓麻城市为研究区开展了实验研究。实验结果表明:时序谐波分析方法能够有效地区分林草资源及森林亚类,时序谐波特征支持下Sentinel-2A密集时序林草资源遥感分类总体精度较高,相比传统多期分类、现有的全球30 m GLC_FCS30-2020分类产品,OA和Kappa均有了一定的提高。
