Land use transition refers to changes in land use morphology, including dominant morphology and recessive morphology, of a particular region over a period of time driven by various factors. Recently, issues related to...Land use transition refers to changes in land use morphology, including dominant morphology and recessive morphology, of a particular region over a period of time driven by various factors. Recently, issues related to land use transition in China have attracted interest among a wide variety of researchers as well as government officials. This paper examines the patterns of land use transition and their dynamic mechanism in the Huang-Huai-Hai Plain during 2000-2010. First, the spatio-temporal patterns of land use transition, their character- istics and the laws governing them were analyzed. Second, based on the established con- ceptual framework for analyzing the dynamic mechanism of land use transition, a spatial econometric regression analysis method was used to analyze the dynamic mechanism of the five types of major land use transition in the Huang-Huai-Hai Plain at the county level. Land use pattern changes in the study area were characterized by an increase in construction land, water body and forested land, along with a decrease in farmland, unused land and grassland. The changes during 2000-2005 were much more significant than those during 2005-2010. In terms of factors affecting land use transitions, natural factors form the basis, and they have long-term effects. Socio-economic factors such as population and GDP, however, tend to determine the direction, structure, size and layout of land use transition over shorter time periods. Land law and policy factors play a mandatory guiding and restraining role in land use transitions, so as to improve the overall efficiency of land use. Land engineering is also an important tool to control land use transitions. In general, the five types of major land use transition were the result of the combined action of various physical, social and economic factors, of which traffic condition and location condition had the most significant effects, i.e. they were the common factors in all land use transitions. Understanding the spatio-temporal process of land use transitions展开更多
In this paper, the management points and cultivation difficulties of onion in different stages were discussed in detail from the aspects of onion cultivation seasons, cultivation methods, sowing and seedling raising, ...In this paper, the management points and cultivation difficulties of onion in different stages were discussed in detail from the aspects of onion cultivation seasons, cultivation methods, sowing and seedling raising, proper planting, field water and fertilizer management, stalk removal period, pest control, timely harvest and so on. This paper provides theoretical guidance for the high quality and high yield of onion in Huang-Huai area and data reference for further improvement of high-yielding onion cultivation technique system.展开更多
The problem of rural development arises from the evolution of rural regional system.It is urgent to deepen the research on the evolution process and mechanism of rural regional system.However,there are relatively few ...The problem of rural development arises from the evolution of rural regional system.It is urgent to deepen the research on the evolution process and mechanism of rural regional system.However,there are relatively few studies on rural development from the perspective of the evolution process,driving mechanism and evolution mechanism of rural regional system.Therefore,this study took Huang-Huai-Hai Area for example,started with the systematicness of the rural regional system,the spatio-temporal pattern and driving mechanism of rural regional system evolution,and further summarized and refined the evolution mechanism of the rural regional system.The methods of spatial pattern analysis,gray correlation degree and geographical detection were adopted.The results showed that the problems in rural areas were often dominated by one factor and produced by the joint action of many factors.Factors such as county urbanization,county economy,county public service,agricultural mechanization,surrounding cities and convenient transportation will affect the evolution of rural regional systems.Based on the evolution of the elements in the rural regional system,the evolution types of rural regional system can be divided into decline type,equilibrium type and growth type.This study can provide a reference for understanding the process of rural rise and fall and can also guide rural revitalization and rural sustainable development.展开更多
为了解近几年黄淮地区小麦品系(种)品质,选取了21个近几年参加黄淮地区小麦区试品系(种)进行高分子量麦谷蛋白亚基(HMW-GS)组成分析。结果表明,21个参加小麦区试的品种中共检测出8种HMW-GS,其中,Glu-A1位点上有2种亚基类型,亚基1占52.3...为了解近几年黄淮地区小麦品系(种)品质,选取了21个近几年参加黄淮地区小麦区试品系(种)进行高分子量麦谷蛋白亚基(HMW-GS)组成分析。结果表明,21个参加小麦区试的品种中共检测出8种HMW-GS,其中,Glu-A1位点上有2种亚基类型,亚基1占52.38%,亚基Null占47.62%;Glu-B1位点出现4种亚基类型,以亚基7+9(57.14%)为主;Glu-D1位点出现2种亚基类型,即亚基5+10(57.14%)和亚基2+12(42.86%)。品质性状分析结果表明,21个小麦品系(种)的蛋白质含量介于12.05%~16.62%,湿面筋含量介于27.84%~38.86%,沉淀值介于20.84~43.87 m L。展开更多
基金National Natural Science Foundation of China,No.41171149,No.41130748The National Key Technology R&D Program of China,No.2014BAL01B05Non-profit Industry Financial Program of Ministry of Land and Resources of China,No.201511004-3
文摘Land use transition refers to changes in land use morphology, including dominant morphology and recessive morphology, of a particular region over a period of time driven by various factors. Recently, issues related to land use transition in China have attracted interest among a wide variety of researchers as well as government officials. This paper examines the patterns of land use transition and their dynamic mechanism in the Huang-Huai-Hai Plain during 2000-2010. First, the spatio-temporal patterns of land use transition, their character- istics and the laws governing them were analyzed. Second, based on the established con- ceptual framework for analyzing the dynamic mechanism of land use transition, a spatial econometric regression analysis method was used to analyze the dynamic mechanism of the five types of major land use transition in the Huang-Huai-Hai Plain at the county level. Land use pattern changes in the study area were characterized by an increase in construction land, water body and forested land, along with a decrease in farmland, unused land and grassland. The changes during 2000-2005 were much more significant than those during 2005-2010. In terms of factors affecting land use transitions, natural factors form the basis, and they have long-term effects. Socio-economic factors such as population and GDP, however, tend to determine the direction, structure, size and layout of land use transition over shorter time periods. Land law and policy factors play a mandatory guiding and restraining role in land use transitions, so as to improve the overall efficiency of land use. Land engineering is also an important tool to control land use transitions. In general, the five types of major land use transition were the result of the combined action of various physical, social and economic factors, of which traffic condition and location condition had the most significant effects, i.e. they were the common factors in all land use transitions. Understanding the spatio-temporal process of land use transitions
基金Supported by Shangqiu Science and Technology Key Project(2023061827)。
文摘In this paper, the management points and cultivation difficulties of onion in different stages were discussed in detail from the aspects of onion cultivation seasons, cultivation methods, sowing and seedling raising, proper planting, field water and fertilizer management, stalk removal period, pest control, timely harvest and so on. This paper provides theoretical guidance for the high quality and high yield of onion in Huang-Huai area and data reference for further improvement of high-yielding onion cultivation technique system.
基金Under the auspices of Key projects of National Natural Science Foundation of China(No.41931293)。
文摘The problem of rural development arises from the evolution of rural regional system.It is urgent to deepen the research on the evolution process and mechanism of rural regional system.However,there are relatively few studies on rural development from the perspective of the evolution process,driving mechanism and evolution mechanism of rural regional system.Therefore,this study took Huang-Huai-Hai Area for example,started with the systematicness of the rural regional system,the spatio-temporal pattern and driving mechanism of rural regional system evolution,and further summarized and refined the evolution mechanism of the rural regional system.The methods of spatial pattern analysis,gray correlation degree and geographical detection were adopted.The results showed that the problems in rural areas were often dominated by one factor and produced by the joint action of many factors.Factors such as county urbanization,county economy,county public service,agricultural mechanization,surrounding cities and convenient transportation will affect the evolution of rural regional systems.Based on the evolution of the elements in the rural regional system,the evolution types of rural regional system can be divided into decline type,equilibrium type and growth type.This study can provide a reference for understanding the process of rural rise and fall and can also guide rural revitalization and rural sustainable development.
文摘为了解近几年黄淮地区小麦品系(种)品质,选取了21个近几年参加黄淮地区小麦区试品系(种)进行高分子量麦谷蛋白亚基(HMW-GS)组成分析。结果表明,21个参加小麦区试的品种中共检测出8种HMW-GS,其中,Glu-A1位点上有2种亚基类型,亚基1占52.38%,亚基Null占47.62%;Glu-B1位点出现4种亚基类型,以亚基7+9(57.14%)为主;Glu-D1位点出现2种亚基类型,即亚基5+10(57.14%)和亚基2+12(42.86%)。品质性状分析结果表明,21个小麦品系(种)的蛋白质含量介于12.05%~16.62%,湿面筋含量介于27.84%~38.86%,沉淀值介于20.84~43.87 m L。
