山东省耕地后备资源宜耕性评价

从生态环境、立地条件、区位指标等3个方面选取了9个评价指标,采用极限条件法对山东省耕地后备资源宜耕性进行评价,并分析不同类型耕地后备资源的空间分布特征。结果表明:山东省耕地后备资源面积为2 100.09km~2,仅占山东省土地总面积的1.33%,其他以草地为主。空间分布呈现出不均衡性,东营市和德州市耕地后备资源数量较多,面积分别为266.59和210.91km~2;青岛市、聊城市、淄博市和威海市耕地后备资源较少,占山东省耕地后备资源面积的比例均3%。不同类型耕地后备资源空间分布差异明显。可开垦其他草地和可开垦内陆滩涂空间分布差异相对较小;可开垦盐碱地和可开垦裸地空间分布集聚特征明显;其他可开垦耕地后备资源数量较少,但空间分布差异较大;可复垦采矿用地的空间分布整体上呈现出"西多东少,南多北少"的空间格局。集中连片耕地后备资源面积为576.67km~2,占耕地后备资源总面积的27.46%。相对稀缺、零散破碎化程度较高、空间分布差异显著是山东省耕地后备资源的主要特征。耕地保护不应只注重占补耕地的数量和质量,还应通过适度规模经营等提高对现有耕地的利用效率,因地制宜加强对各类型耕地后备资源的合理保护和高效利用。

Suitability assessment of reserve cultivated land resources in Shandong Province

A total of nine indicators were selected from three aspects:Ecological environment,ground condition and location.The limiting condition method was employed to assess the suitability of reserve cultivated land resources in Shandong Province.The results show that the total area of reserve cultivated land resources in Shandong province is 2 100.09 km²,most of which is other grass.Its spatial distribution displays significant regional differences.The total area of reserve cultivated land resources in Dongying and Dezhou City is relative high,which are 266.59 and 210.91 km², respectively.While that was relative less in Qingdao,Liaocheng,Zibo and Weihai City,their proportions in Shandong Province are all less than 3%.Different types of reserve cultivated land resources show significant difference in spatial distribution.The difference between the spatial distribution of reclaimable other grass land and inland tidal flats is relatively small.The spatial distribution of reclaimable saline-alkali soil and bare land shows obvious cluster feature.The mining lease has a spatial distribution pattern of "The west higher than the east,while the south higher than the north".The area of centralized contiguous cultivated land resource reservations is 576.67 km²,accounting for 27.46% of total cultivated land resource reservations.Relative scarcity,high fragmentation degree and significant spatial difference are the main characteristics of reserve cultivated land resources in Shandong Province.In cultivated land protection,attentions should not only be paid attention to the balance of quantity and quality,also necessary to improve the utilization efficiency of existing cultivated land and increase the output rate through moderate scale operation.It is necessary to strengthen the rational protection and efficient use of cultivated land resource reservations.