共查询到20条相似文献，搜索用时 296 毫秒
1.
陈昌毓 《中国地理科学(英文版)》1996,6(3):247-258
ＷＡＴＥＲＲＥＳＯＵＲＣＥＩＮＱＩＬＩＡＮＭＯＵＮＴＡＩＮＯＵＳＲＥＧＩＯＮＡＮＤＩＴＳＩＮＦＬＵＥＮＣＥＯＮＥＣＯ－ＥＮＶＩＲＯＮＭＥＮＴＯＦＨＥＸＩＣＯＲＲＩＤＯＲ￥ＣｈｅｎＣｈａｎｇｙｕ（ＭｅｔｅｏｒｏｌｏｇｉｃａｌＢｕｒｅａｕｏｆＧａｎｓｕＰ... 相似文献
2.
许学工 《中国地理科学(英文版)》1996,6(3):212-222
ＴＨＥＳＹＳＴＥＭＡＴＩＣＳＴＲＵＣＴＵＲＥＯＦＴＨＥＥＮＶＩＲＯＮＭＥＮＴＡＮＤＲＥＳＯＵＲＣＥＳＯＦＴＨＥＨＵＡＮＧＨＥＲＩＶＥＲＤＥＬＴＡ￥ＸｕＸｕｅｇｏｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＧｅｏｇｒａｐｈｙ，ＰｅｋｉｎｇＵｎｉｖｅｒｓｉｔｙ，Ｂｅｉ... 相似文献
3.
Guo Rongxing 《中国地理科学(英文版)》1994,(3)
郭荣星ＴＨＥＥＣＯＮＯＭＩＣＩＭＰＡＣＴＯＦＳＰＡＴＩＡＬＯＲＧＡＮＺＡＴＩＯＮＡＬＳＴＲＵＣＴＵＲＥＳＯＮＴＨＥＰＲＯＶＩＮＣＩＡＬＢＯＲＤＥＲ－ＲＥＧＩＯＮＳＯＦＣＨＩＮＡ￥ＧｕｏＲｏｎｇｘｉｎｇ（ＳｃｈｏｏｌｏｆＥｃｏｎｏｍｉｃｓａｎｄＴｒａｄ... 相似文献
4.
ＳＴＡＴＩＳＴＩＣＡＬＡＮＡＬＹＳＩＳＯＦＴＥＭＰＥＲＡＴＵＲＥＳＯＮＢＯＴＨＴＨＥＵＰＰＥＲＡＮＤＬＯＷＥＲＢＯＵＮＤＡＲＩＥＳＯＦＳＵＢ－ＡＬＰＩＮＥＤＡＲＫＣＯＮＩＦＥＲＦＯＲＥＳＴＳＩＮＣＨＩＮＡＷａｎｇＪｉａｎ（王建）；ＸｕＸｉａｏｂｉｎ（... 相似文献
5.
ＰＡＬＥＯＳＯＬＳＡＮＤＴＨＥＩＲＲＥＦＬＥＣＴＩＯＮＯＦＴＨＥＥＮＶＩＲＯＮＭＥＮＴＡＬＣＨＡＮＧＥＳＩＮＴＨＥＮＯＲＴＨＥＡＳＴＲＥＧＩＯＮＯＦＴＨＥＱＩＮＧＨＡＩ－ＸＩＺＡＮＧＰＬＡＴＥＡＵ徐叔鹰，潘保田ＰＡＬＥＯＳＯＬＳＡＮＤＴＨＥＩＲＲＥＦ... 相似文献
6.
THE ORIGIN AND CHARACTERISTICS OF THE GLACIAL DEBRIS FLOW IN THE DUKU HIGHWAY OF TIANSHAN MOUNTAINS，
ＴＨＥＯＲＩＧＩＮＡＮＤＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＯＦＴＨＥＧＬＡＣＩＡＬＤＥＢＲＩＳＦＬＯＷＩＮＴＨＥＤＵＫＵＨＩＧＨＷＡＹＯＦＴＩＡＮＳＨＡＮＭＯＵＮＴＡＩＮＳ，ＣＨＩＮＡ￥ＸｉｏｎｇＨｅｉｇａｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＧｅｏｇｒａｐｈｙ... 相似文献
7.
陈家其 《中国地理科学(英文版)》1994,(2)
ＴＨＥ ＡＰＰＬＩＣＡＢＩＬＩＴＹ ＯＦ ＲＥＳＥＡＲＣＨ ＯＮ ＦＬＯＯＤ－ＤＲＯＵＧＨＴ ＴＥＮＤＥＮＣＹ－ＡＮ ＡＮＡＬＹＳＩＳ ＯＮ ＤＩＳＡＳＴＲＯＵＳ ＦＬＯＯＤ ＯＦ ＴＡＩＨＵ ＬＡＫＥ ＢＡＳＩＮＩＮ ＪＵＮＥ－ＪＵＬＹ，１９９１ ... 相似文献
8.
Li Mingsen 《中国地理科学(英文版)》1996,6(4):321-331
ＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳ ＡＮＤ ＲＡＴＩＯＮＡＬ ＥＸＰＬＯＩＴＡＴＩＯＮ ＯＦ ＬＡＮＤ ＲＥＳＯＵＲＣＥＳ ＩＮ ＸＩＺＡＮＧＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＡＮＤＲＡＴＩＯＮＡＬＥＸＰＬＯＩＴＡＴＩＯＮＯＦＬＡＮＤＲＥＳＯＵＲＣＥＳＩＮＸ... 相似文献
9.
赵魁义 《中国地理科学(英文版)》1998,8(1):44-52
ＦＬＯＲＯＧＥＯＧＲＡＰＨＹＯＦＭＩＲＥＰＬＡＮＴＳＩＮＳＯＵＴＨＥＲＮＰＡＲＴＯＦＱＩＮＧＨＡＩＸＩＺＡＮＧＰＬＡＴＥＡＵＡＮＤＩＴＳＡＤＪＡＣＥＮＴＡＲＥＡＳＺｈａｏＫｕｉｙｉ（赵魁义）ＣｈａｎｇｃｈｕｎＩｎｓｔｉｔｕｔｅｏｆＧｅｏｇｒａｐｈｙ... 相似文献
10.
ＡＮＡＮＡＬＹＳＩＳＯＦＷＡＴＥＲＲＥＳＯＵＲＣＥＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＯＦＴＨＥＲＩＶＥＲＳＩＮＴＨＥＮＯＲＴＨＥＲＮＳＬＯＰＥＯＦＴＨＥＫＵＮＬＵＮＭＯＵＮＴＡＩＮＳＸｕＹｏｕｐｅｎｇ（许有鹏）；ＧａｏＹｕｎｊｕｅ（高蕴珏）（Ｄｅｐａｒｔ... 相似文献
11.
Xiaofang Li 《中国地理科学(英文版)》1994,4(2):168-173
The paper deals with a transformation model of a backward district into a prosperous one. The district is geographically located
in Lixiahe region, Jiangsu Province. The region had long been known as one of the poorest area in China, and had been alternatively
attacked by flood, waterlogging, drought, salinization, and plague of insect. Since the seventies of this oentury efforts
to open up trenches on lowland and to level up the shoaly land have been made. A kind of tree, which is tolerable to high
watertable, was used to afforest the land. Cereal crop, vegetable and beans are grown. In some cases, the shoaly land is used
for sheep grazing and fishery. A favorable combination of forestry, agriculture, animal husbandry and fishery has been set
up in the region. There are five types of managements in the system: 1) forestry-agriculture complex management, 2) forestry-fishery
complex management, 3) forestry-aquatic plant-fishery complex management, 4) forestry-animal husbandry complex management,
and 5) forestry-edible mushroom complex management. The principles and ecological benefits of this system can be identified:
1) Increase soil fertility by piling mud from marsh land on top soil, and thicken the arable layer. 2) Enhance the utilization
rate of sunlight and energy, due to the change of microclimate in field. 3) As a result of multiple layer cultivation and
multi-cropping, the production has been greatly increased. 4) Accelerate the cycling of matter and conversion of energy and
nutrient of the system. 5) Decrease the consumption of soil fertility and increase the capability of controlling insect pests.
6) Improve ecological environment by afforestation. 7) Raise income and provide jobs for local peasants, even some ones from
other part of this province. 相似文献
12.
Paradigm and ecological implication of changing agricultural land-use: A case study from Govind Wildlife Sanctuary, Central Himalaya, India 总被引：1，自引：1，他引：0
The paper scrutinizes that the changes in any sub-system(i.e.agriculture,livestock and forest) have direct impact on biophysical and social processes in village ecosystem of the central Himalayan region.In view of this,we studied the changes in spatial patterns of agricultural land use and dependency of agroecosystem on forest and animal husbandry over a period of two decades.Based on data analysis it was found that the cultivation of some traditional crops has either been abandoned in the area or declined by 25%-85% due to introduction of cash crops viz.,potato,kidney bean and apple farming with acreage increased up to 51%-72% in the last three decades.Livestock population of different categories has declined drastically by 17%-75%,and has resulted shortage of farmyard manure,deterioration of soil quality and fertility which leads to un-sustainability of agriculture system.The changes in agrobiodiversity have led to the dramatic increase in soil loss and runoff from the croplands together with the increase pressure on forests.The economic evaluation of each crop showed higher monetary benefit from cash crops as compared to traditional crops.Among all the evaluated crops,the monetary output/input ratio was found highest(3.04) for kidney bean and lowest(1.26) for paddy.Changes in land use and management have improved household income but at the cost of forest degradation,less productive animal husbandry and loss of agrodiversity in the region.Therefore,there is an urgent need to bring desirable changes in agricultural policy,research,land use and efficient management of the resources for maintaining sustainability in agro and Himalayan forest ecosystem. 相似文献
13.
The effect of land use changes on soil conditions in arid region 总被引：1，自引：1，他引：0
Biography:CHEN Fu(1974－ ), male,a native of Sheyang County, Jiangsu Province, doctoral candidate.His research interests include land use management.1 INTRODUCTION Land use change may influence a variety of natural and ecological processes, including soil nutrient, soil moisture, soil erosion, land productivity (FU et al., 1999), biodiversity, cycle of biographical geochemistry, and so on (VITOUSEK, 1994). So, it is very important that the studies of land use changes understand re… 相似文献
14.
采用近30年来的统计数据,对改革开放以来中国农业生产的总体趋势进行了分析描述,认为以农林牧渔业增加值(第一产业增加值)表示的农业生产水平总体上呈现上升趋势;通过对影响农业生产的因素运用因子分析法进行综合归纳,认为投入因子、土地面积因子以及价格因子是影响农业生产最主要的公共因子。最后运用投入因子、土地面积因子以及价格因子建立了中国农业生产总体情况的预测模型。 相似文献
15.
Current methods that utilize simple data or models to judge whether soil fertility can selfdevelop are not sufficiently rigorous. A new framework has been set up using catastrophe theory, laboratory experiment, field work, and 3S(Geographic information system, Global positioning system, and Remote sensing) to explore soil fertility catastrophe under ecological restoration, discriminate whether soil fertility can self-develop, and propose adjustment of ecological restoration measures in the Zhuxi watershed of Changting County, Fujian Province, China, which is a typical representative of the red soil hilly region of China. The results show that: 1) the soil fertility is obviously improved through the four ecological restoration measures, which impels soil fertility catastrophe. Among 89 soil samples, catastrophic soil samples and stable soil samples account for 26(29.21%) and 63(70.79%) of the samples, respectively. The four ecological restoration measures are listed in the order lowquality forest improvement arbor–bush–herb mixed plantation orchard improvement closing measures according to the proportions of catastrophic soil samples. A typical soil sample in Bashilihe that can self-develop is selected as the criterion to judge the upper lobe and lower lobe of soil fertility in the process surface of the Cusp catastrophe model. Twenty-six(29.21%) were in the middle lobe, 10(11.24%) were in the upper lobe, and 53(70.79%) were in the lower lobe. The catastrophic direction of 26 catastrophic soil samples is to the upper lobe according to soil and water loss change as well as fieldwork. There is a significant positive correlation of Δ with soil and water loss change, and the lower soil and water loss relates to higher catastrophic probability. 2) Soil fertility self-development could be regionalized as "Soil fertility can self-develop" whose area was 12.74 km2(28.33%) distributed mainly in the leftmost and rightmost parts, "Soil fertility tends to self-develop" whose area was 11.63 km2(25.89%) distributed mainly in the middle part, and "Soil fertility cannot self-develop" whose area was 20.58 km2(45.78%) distributed mainly between the above two types. 3) There is no need to take ecological restoration measures and excessive human interference should be avoided in the future in regions of "Soil fertility can self-develop" and "Soil fertility tends to self-develop," and ecological restoration measures should be taken in region of "Soil fertility cannot self-develop." 4) We suggest withdrawal and implementation of ecological restoration measures should be incorporated into the evaluation criteria of ecological restoration to avoid misuse of funds. 相似文献
16.
17.
LIAOChi-mei LILan YANZhi-qiang HUBao-qing 《中国地理科学(英文版)》2004,14(2):142-147
Ecological security is the main task and applied field of present geography, resources and environment sciences and ecology. Ecological security evaluation will efficiently promote ecological security and environmental construction in regional land use. In this thesis, the authors put forward the index system of ecological security evaluation in karst mountainous area on three aspects, the pressure of resources and eco-environment, the quality of resources and eco-environment, and the ability of environmental protection and ecological improvement. Using the evaluation method with single index, based on the case study ofDu‘an Yao Autonomous County of Guangxi Zhuang Autonomous Region, the system ofsynthetic regionalization ofecological agricultural economy was formed, which includes three regions, south region with basic security and synthetic agricultural development, east region with critical security and agriculture, forestry, animal husbandry balanced development, mid-west and south region with ecological insecurity and compounded agriculture and forestry management. Meanwhile, for these regions, the countermeasures of sustainable agricultural development were pointed out, which provide the basis and example for ecological regulation and control of sustainable agricultural development in counties of karst mountainous area. 相似文献
18.
Ecological security is the main task and applied ficld of present geography, resources and environment sciences and ecology. Ecological security evaluation will efficiently promote ecological security and environmental construction in regional land use. In this thesis, the authors put forward the index system of ecological security evaluation in karst mountainous area on three aspects, the pressure of resources and eco-environment, the quality of resources and eco-environment, and the ability of environmental protection and ecological improvement. Using the evaluation method with single index, based on the case study of Du'an Yao Autonomous County of Guangxi Zhuang Autonomous Region, the system of synthetic regionalization of ecological agricultural economy was formed, which includes three regions, south region with basic security and synthetic agricultural development, east region with critical security and agriculture, forestry, animal husbandry balanced development, mid-west and south region with eco 相似文献
19.
Bai Zhang 《中国地理科学(英文版)》1994,4(4):322-332
（张柏）ＴＨＥＳＴＲＵＣＴＵＲＥＡＮＤＤＹＮＡＭＩＣＳＯＦＴＨＥＬＡＮＤＲＥＳＯＵＲＣＥＳＳＹＳＴＥＭＩＮＴＨＥＦＡＲＭＬＡＮＤＳＨＥＬＴＥＲＦＯＲＥＳＴＲＥＧＩＯＮＩＮＴＨＥＮＯＲＴＨＥＡＳＴＰＬＡＩＮ￥ＺｈａｎｇＢａｉ（ＣｈａｎｇｃｈｕｎＩｎｓｔ... 相似文献
20.
Soil degradation and food security coupled with global climate change in northeastern China 总被引：3，自引：1，他引：2
The northeastern China is an important commodity grain region in China,as well as a notable corn belt and major soybean producing area.It thus plays a significant role in the national food security system.However,large-scale land reclamation and non-optimum farming practices give rise to soil degradation in the region.This study analyzed the food security issues coupled with global climate change in the northeastern China during 1980–2000,which is the period of modern agriculture.The results of statistical data show that the arable land area shrank markedly in 1992,and then increased slowly,while food production generally continually increased.The stable grain yield was due to the increase of applied fertilizer and irrigated areas.Soil degradation in the northeastern China includes severe soil erosion,reduced soil nutrients,a thinner black soil layer,and deterioration of soil physical properties.The sustainable development of the northeastern China is influenced by natural-artificial binary disturbance factors which consist of meteorological conditions,climate changes,and terrain factors as well as soil physical and chemical properties.Interactions between the increasing temperature and decreasing precipitation in the region led to reduced accumulation of soil organic matter,which results in poor soil fertility.Human-induced factors,such as large-scale land reclamation and non-optimum farming practices,unsuitable cultivation systems,dredging,road building,illegal land occupation,and extensive use of fertilizers and pesticides,have led to increasingly severe soil erosion and destruction.Solutions to several problems of soil degradation in this region requiring urgent settlement are proposed.A need for clear and systematic recognition and recording of land use changes,land degradation,food production and climate change conditions is suggested,which would provide a reference for food security studies in the northeastern China. 相似文献