新疆；耕地变化；地域分异；人口。
Xinjiang; arable land use change; spatial differentiation; population.
通过对酒泉市耕地的动态变化分析，得出影响酒泉市耕地变化的因素是自然因素和社会经济因素。
By analyzing the dynamic changes of cultivated land in Jiuquan City, it was found that the factors of influencing the cultivated land changes were the natural and economic factors.
根据各时段各主成分的特征向量计算出主成分的指标值。并分析得出各个时间段的耕地变化驱动因子。
Indicators of each principal component were calculated according to the eigenvalues of each of them, and driving forces of cultivated land in each period can acquired.
在前人研究基础上，利用国家统计资料，分析了我国近20年来耕地变化总体趋势：耕地总量持续减少；
The main tendency of plowland in China in recent 20 years was analyzed on the base of anterior research and statistic data: the amount of plowland is decreasing;
济南市耕地年均变化速度达到-0.3%，其中市中区和天桥区的耕地变化速度最大，商河县变化速度最小。
Cultivated Land to -0.3% average annual rate of change, of which City bridge area of cultivated land area and the maximum rate of change, the minimum rate of change Shanghe County.
应用GIS技术与统计方法对1990 ~ 2001年太原市万柏林区城乡结合部的耕地变化进行了定量分析。
The quantitative change of the cultivated land from 1990 to 2001 in the urban fringe of Wanbailin District, Taiyuan, Shanxi Province was studied, applying GIS techniques and statistical method.
耕地变化存在显著的地域差异：1996年至2001年之间呈现中部和北部地区耕地变化密集分布，其他区域处于零散分布状态；
Significant changes in land geographical differences: between 1996 to 2001 showed changes in the central and northern areas of cultivated land dense, scattered distribution in other regions;
另一方面，随着生产力水平的提高和其他因素的影响，人类活动对耕地变化的贡献率不断增大，耕地变化影响因子的作用也存在明显的时间差异。
On the other hand, with enhancement of productive forces and change of other affecting factors, the proportion of human activities affecting on cultivated land continuously increases.
该文在多时相遥感图像中采用主成份差异法提取耕地变化信息，研究的关键在于差值前如何进行图像匹配、如何自动提取变化信息以及差值后如何确定变化阈值。
This paper describes how to detect change of land with multi-temporal remotely sensed image. The key is how to match images, detect change and confirm the change threshold.
粮农组织还在报告中提出，食物需求在未来的40年因人口增长将会上升70%，但与此同时可耕地却因城市化及气候变化而逐渐减少。
The FAO also reports that food production needs to rise by 70% in the next 40 years to meet population growth, while there will be less available land due to urbanization and climate change.
——气候变化，侵蚀、盐碱化等耕地破坏。
Climate change and damage to farmlands such as erosion or salinity.
本文运用典型相关分析方法，对全国1990 - 2006年的耕地利用集约度变化态势及其影响因素进行了分析。
This paper analyzes the change of cultivated land intensive use degree from 1990 to 2006 in China and its influencing factors using canonical correlation analysis.
本文论述了自1980年调查以来冀东滨海稻区耕地土壤养分的变化状况，分析了土壤养分含量变化的原因，提出了改良途径。
In this paper, we discuss soil nutrients change status of paddy rice land in Jidong coastal area since 1980, to analyse the reasons and put forward a modified way.
区域产业结构的变化对土地利用结构有决定性作用，从而对耕地质量保护形成决定性影响。
The industrial structure upgrading has great affections on cultivated land quality protection by changing mode and degree of regional land use.
耕地利用变化评价研究具有重要的应用价值。
Assessment of the change of farmland use is of great important.
从空间分布变化来看，主要表现为耕地向林地、草地及园地转变。
The spatial distributing changes of land use showed that the farmland was mainly converted to forestland, grassland and orchard.
在遥感和GIS技术的支持下，分析了东北黑土区1986 ~ 2000年耕地资源变化特征与空间格局。
Based on RS and GIS, the cropland change characteristics and spatial pattern in black soil zone of Northeast China from 1986 to 2000 were analyzed.
本文着重讨论了各种定量分析方法在耕地供给变化研究上的应用，包括驱动定量分析方法和空间分析方法，并给出了各种分析方法的应用实例。
This paper is concentrated on a series of quantitative methods when analyzing on cultivated land supply change, including driving quantitative methods and spatial analysis methods.
但近年来，农村土地流转过程中出现了农地用途的变化，特别是耕地的非粮化现象越来越成为关注的焦点。
But in recent years, rural land transfer occurred during the change of agricultural land use, especially in the non-food phenomenon of cultivated land has increasingly become the focus of attention.
因此，展开耕地资源变化的研究具有重要的理论意义和实践意义。
Therefore, it is significant to study the change of cultivated land in both theory and practice.
耕地的争夺加快了亚马逊以及其他地区森林的砍伐、加剧了气候变化以及大量其他环境问题。
The competition for fertile land is helping accelerate deforestation in the Amazon jungle and elsewhere, adding to climate change and a host of other environmental problems.
影响耕地数量变化的因素错综复杂，简单的回归分析不易得到满意的模型结果。
The purpose of this study is to analyze the driving factors of cultivated land quantity variation and find its change mechanism in Heilongjiang Province.
通过引入耕地面积相对变化率计算分析了张掖绿洲各区县耕地资源变化的区域差异。
By calculating the relative change ratio of the cultivated land, the author analyzes the difference of the cultivated land changes in the different sections of Zhangye Oasis.
本文通过对我国耕地数量变化研究的回顾，总结了耕地数量变化研究方面的主要进展，并指出了研究中存在的主要问题及其给人们的启示。
This paper reviews and summarizes main progresses in the study on quantitative change in cultivated land and points out some problems still existing in the study and possible solutions.
表现为随植被经营利用而出现阶段性的变化，牛鞭草的刈割对退耕地地表径流和土壤侵蚀影响较大。
The periodic change of runoff and erosion occurred after the tilling operation and the cutting of grass.
城镇建设用地通过大量占用耕地而扩展，非城镇建设用地间结构变化明显；
The urban construction land was increasingly expanding by massively occupying arable land and there was a remarkable structural change of non-urban construction land;
耕地的变化是区域土地利用变化的核心，其变化和流向反映了社会经济的基本态势。
The change of cultivated land is core of regional land utilization change. It's change and change trend reflects basic state of society economy.
耕地的变化是区域土地利用变化的核心，其变化和流向反映了社会经济的基本态势。
The change of cultivated land is core of regional land utilization change. It's change and change trend reflects basic state of society economy.
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