2) Cultivated land
耕地面积
1.
With the combination of GIS technology and remotely sensed data,cultivated land changing trend in regional scale can be easily traced and inventoried in time.
结果表明,在过去50多年里,三江平原耕地面积发生了显著变化。
2.
In Beijing, the cultivated land area has decreased from 456,040 ha in 1981 to 287,633 ha in 2001.
80年代年以来 ,北京市土地利用结构发生了巨大的变化 ,突出表现在耕地面积大量减少。
3) farmland area
耕地面积
1.
It reveals that the difference of the two kinds of farmland area estimates was mainly caused by the difference in the caliber of their measurement units and the difference in the coverage of the data applied in both kinds of estimation.
深入分析耕地面积详查数据与统计数据的来源和计量单位口径以及数据覆盖范围,建立了详查口径耕地面积与统计口径耕地面积的关系方程。
4) cultivated land area
耕地面积
1.
The results showed that: the cultivated land area,the total output and the quantity per capita of grain had been increasing,the pressure index of cultivated land had trended to decrease obviously between 1981 and 2006;but in the comin.
研究结果显示:1978-2006年,内蒙古耕地面积、粮食产量和人均占有量都有所增加,耕地压力指数呈现明显降低的趋势;但未来近十年内,耕地压力指数会增大,到2017年,耕地压力指数将达到1,之后耕地压力指数进一步增大,遭遇耕地危机,严重影响粮食生产的发展。
2.
The conclusions are as follows:① The pressure index in cultivated land in Shaanxi province is gradually increased,cultivated land pressure is mounting,because the cultivated land is greatly reduced and the population increases gradually;② The cultivated land area ch.
结果表明:虽然粮食单产和复种指数不断提高,但是由于耕地面积大量持续减少、人口的不断增多,1978~2005年陕西省耕地压力指数较高,耕地压力较大,并且呈上升趋势;2005年区间耕地压力差异不显著,但区间1996~2005年耕地压力变化差异明显,陕北高原区>秦巴山区>关中平原区。
3.
The surveys and prediction of cultivated land area provide an effective way for cultivated land protection.
耕地保护事关一个地区粮食战略安全问题,而耕地面积的测算与预测为耕地保护提供了决策支撑。
5) Cultivated area
耕地面积
1.
A nonlinear model about grain total output and cultivated area is set up.
通过建立粮食产量与耕地面积间的非线性动力学模式,分析粮食产量与耕地面积之间的关系。
2.
By analysis of the land used for urban construction for eight years and the decreasing cultivated land for ten years,employing mathematics model to infer cultivated area in 2010,it is concluded that the increasing of urbanization will definitely result in the enormous extention of construction land.
通过对衡水市近8年来城镇建设用地、近10年耕地减少的情况进行分析,并利用数学模型对2010年的耕地面积情况进行推测,得出了“城镇建设的加快必然引起建设用地大幅增加”的结论,并进而提出了解决这一矛盾的3种途径:即保护存量,走规范发展之路;盘活存量,走内部挖潜之路;提高存量使用标准,走高效发展之路。
3.
Cultivated area increase by 51.
近十年内蒙古东北部额尔古纳市、科右前旗、东乌珠穆沁旗等２４ 个旗市耕地面积增加了５１。
6) Arable land area
耕地面积
1.
Using GIS as an analyzing tool, the characteristics, reasons, and trends of spatial alternation of China s arable land area are studied based on the national grain production database(by county unit) in two periods (in 1985and 1994).
本文以１９８５年与１９９４年我国各县粮食生产统计数据为依据，运用地理信息（ＧＩＳ）为分析手段；从空间变化特征、变化成因及变化趋势三个方面，着重对１９８４年以来我国耕地面积的空间变化进行了定量研究。
2.
The spatio-temporal change of arable land area in Sichuan Province is investigated based on the modification data of land use from 1996 to 2006.
据1996-1999年土地利用变更调查数据研究四川省耕地面积时空变化,结果表明耕地面积和人均耕地面积持续下降,所辖21个地区耕地面积呈不断减少趋势,减少幅度表现出一定区域性。
补充资料：可耕地
可以耕作的土地。包括现有耕地和可开垦的宜农荒地。但坡度较大、水土流失严重需退耕还林、退耕还牧的土地不在内。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条