By analyzing the cultivated land data from different sources in different phases after 1949,the paper considers the statistics with more errors happens during 1960-1985.According to the systematic data on land use gathered in the 1996 survey,based on reverse deduction of the cultivated land area from 1986 to 1996,and deduction of the cultivated land area from 1960 to 1985 by stages by employing yield of grain,this paper redescribed the actual changing trend and character of Chinese cultivated land and analyzed the driving force of the policy relative to cultivated land to cultivated land area change.

針對該問題人人肉人人摸人人操，論文對1949～2003年不同時期不同來源的耕地數(shù)據(jù)系列進行分析性生活黄色网站，認為統(tǒng)計數(shù)據(jù)存在問題較多的時期為1960～1985年无码中文字幕一级毛片，并采用糧食產(chǎn)量對耕地面積進行了分時期的反演亚洲日本色图，對于1986～1996年間的耕地數(shù)量則按照全國土地利用詳查統(tǒng)一到1996年的結(jié)果再進行反推，由此重新刻畫建國以來中國耕地資源數(shù)量變化的趨勢和特征黄色片子网址，并結(jié)合不同時段耕地相關(guān)政策對耕地數(shù)量變化的驅(qū)動作用進行分析久久99精品这里精品,9。

By analyzing the cultivated land data from different sources in different phases after 1949,the paper considers the statistics with more errors happens during 1960-1985.According to the systematic data on land use gathered in the 1996 survey,based on reverse deduction of the cultivated land area from 1986 to 1996,and deduction of the cultivated land area from 1960 to 1985 by stages by employing yield of grain,this paper redescribed the actual changing trend and character of Chinese cultivated land and analyzed the driving force of the policy relative to cultivated land to cultivated land area change.

針對該難題，論文對1949～2003年不同時期不同來源的耕地數(shù)據(jù)系列進行分析网站视频你懂的，認為統(tǒng)計數(shù)據(jù)存在問題較多的時期為1960～1985年亚洲色图欧美色图日本，并采用糧食產(chǎn)量對耕地面積進行l(wèi)e分時期的反演，對于1986～1996年間的耕地數(shù)量則按照全國土地利用詳查統(tǒng)一到1996年的結(jié)果再進行反推国产变态视频在线播放网站，由此重新刻畫建國以來中國耕地資源數(shù)量變化的趨勢和特征欧美黄色A片一区二区，并結(jié)合不同時段耕地相關(guān)政策對耕地數(shù)量變化的驅(qū)動作用進行分析。

The land use pattern had changed by a relatively large margin in Neijiang city from 1997 to 2005. The main tendency of this change is that with remarkable reduction of cultivated land that decreased by 9936.11hm~2, unutilized land and water area, while garden land, forest land that increased by 7032.23 hm~2, grass land and building land increased notably. And during the research time, the speed of land use type change reduced from garden land, traffic land, forest land, residential areas and industrial and minings land, cultivated land, unutilized land to water area. The main trend of general dynamic degree changed from progressive increase to degression. From the analyses of land use diversion matrix, we know resulting in the quantity change of land use was that cultivated land being occupied by construction,adjustment in structure of agriculture and the implementation of the national reforesting formerly cultivated land policy in Neijiang city.

結(jié)果表明：1997～2005年間日本a网站，土地利用類型發(fā)生較大幅度變化，總體上呈現(xiàn)耕地欲香欲色综合网天天涩综合、未利用地九九精品热全在这、水域面積顯著減小和園地黄色入口、林地、牧草地国内免费自拍1视频在线观看网址、建設(shè)用地面積增大的趨勢国产高清一区二区亚，其中耕地面積減幅最大，達9936.11hm~2东北女人叫床大片毛片AA，林地增幅最大国产成人情侣在线手机观看免费，達7032.23 hm~2；土地利用類型變化速度依次為園地＞交通用地＞林地＞耕地＞居民點及工礦用地＞未利用地＞水域性交网址在线观看，其中園地為2.67％www.Heyoz.com，水域為-0.01％，綜合土地利用動態(tài)度呈現(xiàn)先遞增后遞減的趨勢一级a片XX；從土地利用類型轉(zhuǎn)移矩陣分析得出A片一级二级三级，建設(shè)用地占用耕地、農(nóng)業(yè)結(jié)構(gòu)內(nèi)部調(diào)整丝袜美腿足交、&退耕還林&是導(dǎo)致內(nèi)江市土地利用類型數(shù)量變化的重要原因在线观看国产爆草网站。

cultivated land：農(nóng)田土壤

坡耕地:Cultivated Slope Land | 農(nóng)田土壤:Cultivated land | 坡耕地資源:sloping cultivated land resource

cultivated land：耕地資源

耕地資源:Cultivated land resources | 耕地資源:cultivated land | 評價:cultivated reserved land resources

Reconverting Cultivated Land into Forest and Grassland：一退兩還

退耕還林還草:Returning cultivated land to forestland or grassland | "一退兩還":Reconverting Cultivated Land into Forest and Grassland" | 耕地總量動態(tài)平衡:Total Dynamic Balance Of Cultivated Land