耕地的

According to the integrated fertility index of all the evaluate units, cultivated land in Mingguang was classified into five grades using the cumulative frequency curve method.

根据明光市评价单元的耕地地力综合指数，利用累积曲线法将耕地地力合理地划分为五个等级，并运用Mapgis6.7绘制耕地地力等级图及统计各等级耕地的面积。

The national "11 Five Years Plan" presents an infrangible index to keep 120 million hm^2 of plowlands, which demands a most strict plowland protective system to control the plowland reduction, an augment of plowlands and land consolidation.

国家"十一五"规划中提出了确保耕地1.2亿hm^2的约束性指标，这就要求在实行最严格的耕地保护制度控制耕地减少的同时，大力推进土地整理，加大补充耕地的力度。

In provinces owning cultivated land of higher productivity and higher potential of multiple cropping, the cultivated land is reducing and the rate of multiple cropping is falling.

在耕地粮食生产能力和复种指数潜力较高的一些省区，同时存在耕地的损耗和复种指数的下降，在农产品需求多样化的趋势下，粮食占播种面积的比率也在下降，即使粮食播种面积单产提高也不能从总体上替代实际损耗的耕地。

Analysis of the archives data of Hetian region during the Republic of China showed that this time water resources basically maintained on a stable level, and it was not the decisive factor to the waste of local big area tilth, but the essential factor actually restricted the population quantity, the reclamation wasteland scale and the overall cultivated area level in all the counties.

地区人口增长过多引发对地区耕地面积的需求扩大，同时引起对耕地灌溉水量的增长需求扩大，由此呈现出农田灌溉水不足的表象，造成地区人口、耕地水平与水资源承载力相互关系的失调；即影响和田地区耕地撂荒的关键是当地水资源总量与人口规模、耕地面积总水平的平衡关系，突破这个平衡就必然引起耕地的撂荒或生态环境劣化；而诱发耕地大面积撂荒的自然因素也与过度垦荒有一定程度的关系。

Farmland protection includes farmland amount protection and farmland quality protection, the quality standard of farmland basically expresses by the size of the edaphic fertility of farmland.

耕地保护包括耕地数量保护和耕地质量保护，耕地的质量水平主要由耕地的土壤肥力的大小来表示。

Under the Plantation Occupancy-Compensation Balance Policy, the total yield capacity of plantation in Jiangsu province is descending due to the gradually consumed plantation resources during urbanization, so the major measure to guarantee provisionment is to increase plantation utilization efficiency.

在&耕地占补平衡&政策下，江苏省耕地的总体生产能力呈下降趋势。由于耕地后备资源短缺和城市化过程需消耗相当数量耕地资源，未来江苏省解决粮食安全的主要途径就是提高耕地利用效益。

Results showed that:(1) soil loss from plough tillage was as much as 3~8 times that from no-tillage; the aerodynamic roughness lengths under plough and no-tillage were 0.032, 0.417, respectively.(2) No-tillage soil contained more clay and fine sand in the 0-10cm topsoil layer than the plough tillage soil. In the 0-5 and 5-10cm soil depth, the bulk density, soil hardness and soil moisture were more under no-tillage than plough tillage. Especially, the soil hardness in 0-5, 5-10 and 10-20cm under no-tillage were as much as 4.7, 2.8 and 3.8 times, respectively.

研究结果表明：翻耕农田土壤风蚀量是免耕地的3~8倍，翻耕地和免耕地的地表粗糙度分别为0.032和0.417；与翻耕地相比，免耕地表层0~10cm土壤粘粒和粉粒含量较多；免耕地土层0~5cm和5~10cm的土壤容重、坚实度和土壤水分都大于翻耕地，其中0~5cm、5~10cm和10~20cm土层土壤坚实度分别是翻耕地的4.7、2.8倍和3.8倍。

At last, the cultivated land spatial protection strategy by leveling and districting is put forward. Such as emphasis on the quality protection of cultivated land, protecting eco-landscape function, increasing the exploitation of reserve resource, reducing non-agricultural cultivated land occupation, strengthening the policy management, etc. Then such policy is put forward as promoting and improving the compensation system of cultivated land, carrying on the balance between quantity and quality of cultivated land.

最后，作者提出了分区的耕地空间保护策略，并提出耕地保护不仅要保数量，更要保质量，要加强保护长江三角洲地区耕地的生态景观功能、在生态环境允许的情况下，加大滩涂等后备资源的开发与培育、促进土地的节约集约利用，减少非农建设对耕地资源的占用等耕地保护重点以及提出促进完善耕地占用补偿机制及实施耕地占补平衡的数量质量平衡控制等耕地保护政策。

Based on long-term statistical data of cultivated land and economy, and land use survey data since municipalized, this paper focuses on relation between cultivated land use change and socio-economic development, and the cultivated land change since municipalized.

根据重庆市1952-2003年长序列耕地和经济统计数据及1997年重庆市直辖以来土地利用调查数据，重点分析了重庆市耕地利用变化与社会经济发展的关系，以及直辖以来耕地的变化情况。

For unauthorized occupation of farmland, tax liability for the farmland occupation tax occurred on the day of the actual occupation of cultivated land.

未经批准占用耕地的，耕地占用税纳税义务发生时间为实际占用耕地的当天。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。