耕地的

A great amount of cropland will be lost by the urban expansion and threat the grain safety in China.

城镇居民点用地扩展占用大量的耕地资源，从而造成耕地资源的大量减少，威胁中国的粮食安全。

Main loss of cultivated land is submerged by flood or dug to fishpond. Inferior loss of it is to city building.

江夏区的耕地减少主要是洪水淹没及开挖渔池所致，城市扩展所造成的耕地建设的数量并不大，但却是不可逆变化。

The result shows that the human activities are the dominant factors led to arable land and forestland area changing.

同时，建立了耕地、林地面积变化与主要驱动力因子之间的多元线性回归模型，回归模型的系数很好地解释了各因子对耕地、林地面积变化的贡献率。

1Nitrogen,phosphorus,and potassium fertilizer application amounts in Jiangsu province paddyfield in 1995 are 663,221,373 kg/ha,which is 3,2,4 times as much as those of same unitcultivated area in China,and 10,9,23 times as much as chemical nitrogen,phosphorus andpotassium fertilizer application amount in the world.

1995年全省稻田氮磷钾施用量分别为663、221、371公斤/公顷分别是我国同年单位耕地面积的施用量212、99.8、84.9公斤/公顷的3、2、4倍多，是世界单位耕地化学氮磷钾肥用量的10、9、23倍多。

Dynamic change in arable-land resources in Qixia between 1990 and 2000 were studied with the aid of remote sensing.

耕地是一种数量有限的自然资源，保持一定数量的耕地是人类生存和发展的基础。

The comparative advantage degree of the main agricultural products in planting industry were calculated and comprehensively judged The research results showed that Napo County had no comparative advantage in farmland-intensive agricultural products such as grain because of being in lack of farmland resources, backward farming mode and high production and sale cost, But it had an obvious comparative advantage in labor-intensive and resource-monopoly economic crops such as Illicium verum, Chinese herbal medicine and silkworms.

研究结果表明，那坡县因耕地资源匮乏、耕作方式落后和生产销售成本高而在粮食等耕地密集型的农产品上缺乏比较优势，而在八角、中草药、桑蚕等劳动密集型和资源垄断型的经济作物上具有明显的比较优势，建议把重点品种划分为3个层次进行培育和发展。

The Village has 780 mu of paddy fields and 350 mu ofnonirrigated dryland, with an average of 0.6 mu cultivated land per capita (0.4 mupaddy field and 0.2 mu nonirrigated dryland ), an average slightly above that of 0.5mu of the whole province.

全村现有水田780亩、旱地350亩，人均耕地0.6亩（水田4分，旱地2分），人均耕地面积略高于广东省人均0.5亩的数值，水田的比例却是较低的。

Therefore take the example of Qingdao, adopt the technology of remote sensing, geographical information system and global position system, employ mathematics models to study its changes of land use and land cover and make an analysis on the human driving forces which have formed the present pattern of land use and land cover and caused the pattern changes of land use and land cover. The aim of the study above is to help people understand and deal with the relation between economic development and tillable land protection, thus harmonize the tillable land protection with economic development and population development in the future.

选择青岛市作为山东省典型例子，采用遥感、地理信息技术和全球定位技术，利用数学模型来定量研究区域土地利用／土地覆被的时空变化，同时还对土地利用格局及土地利用格局变化的驱动因素进行了分析，以便正确认识和处理经济发展与耕地保护的关系，耕地保护与未来经济发展以及人口增长协调发展。

Dam area of arable land accounts for about one third of the total cultivated area , slightly more than dry paddy field, and another part of the swidden land and no water to ensure that water into the paddy fields, water into dry land, when the "Ray ring fields."

坝区耕地占总耕地面积的三分之一左右，水田略多于旱地，另有一部分轮歇地和无水源保证，有水时成水田，无水时成旱地的&雷响田&。

Issue of design a systemic cultivated land quality evaluation system was put forward based on the problem of cultivated land yield, income and value in our nation.

因此，在探讨我国耕地产量、收益和价值问题的基础上，提出了构建一个系统化耕地质量评价体系的研究目标。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。