發(fā)布時(shí)間：2018-04-15 20:49

  本文選題：耕地?cái)?shù)量 + 耕地質(zhì)量��； 參考：《長(zhǎng)江流域資源與環(huán)境》2017年10期

【摘要】：耕地變化的區(qū)域分異研究可為確保國(guó)家糧食安全和生態(tài)安全提供重要依據(jù)�；赗S和GIS技術(shù),分析太湖流域1985~2015年耕地?cái)?shù)量、質(zhì)量和動(dòng)態(tài)結(jié)構(gòu)的時(shí)空演化格局。結(jié)果表明:近30a流域耕地呈現(xiàn)以城鎮(zhèn)為中心面的邊緣擴(kuò)散和以鄉(xiāng)鎮(zhèn)為中心點(diǎn)的散布流失特征,導(dǎo)致耕地凈減少了38.87%,其中環(huán)湖、沿江城市密集區(qū)及縣域空間拓展區(qū)是耕地流失的熱點(diǎn)區(qū)域。耕地集中連片分布區(qū)與經(jīng)濟(jì)發(fā)展快速區(qū)的空間復(fù)合導(dǎo)致耕地縮減與建設(shè)用地?cái)U(kuò)張呈現(xiàn)空間對(duì)應(yīng)關(guān)系,建設(shè)占用始終是驅(qū)動(dòng)耕地減少的主要因素。不同階段受經(jīng)濟(jì)發(fā)展水平和農(nóng)業(yè)政策影響,不同地類對(duì)耕地轉(zhuǎn)移的貢獻(xiàn)率和空間分布差異明顯,且轉(zhuǎn)移比例在數(shù)量和質(zhì)量上均不對(duì)等�？傮w上,耕地變化呈現(xiàn)由緩慢零散占用到快速集聚流失的過(guò)程,耕地?cái)?shù)量和質(zhì)量變化高值和低值區(qū)亦表現(xiàn)由分散到集中的格局,最終驅(qū)動(dòng)了耕地優(yōu)勢(shì)區(qū)由環(huán)湖平原區(qū)向西南丘陵區(qū)的空間轉(zhuǎn)移。
[Abstract]:The research on regional differentiation of cultivated land change can provide important basis for ensuring national food security and ecological security.Based on RS and GIS techniques, the temporal and spatial evolution patterns of cultivated land quantity, quality and dynamic structure in Taihu Lake Basin from 1985 to 2015 were analyzed.The results showed that the cultivated land in recent 30 years showed the characteristics of marginal diffusion with the town as the center and the dispersion and loss of the township as the center point, which resulted in the net decrease of the cultivated land in 38.87, in which the lake was surrounded.Urban concentrated area and county spatial expansion area along the Yangtze River are the hot spots of cultivated land loss.The spatial combination of concentrated and continuous distribution area of cultivated land and rapid economic development area leads to the spatial correspondence between cultivated land reduction and construction land expansion. Construction occupation is always the main factor driving the decrease of cultivated land.Under the influence of economic development level and agricultural policy, the contribution rate and spatial distribution of different land types to cultivated land transfer are obviously different, and the transfer ratio is not equal in quantity and quality.In general, the change of cultivated land shows a process from slow and scattered occupation to rapid agglomeration and loss, and the high value and low value areas of the change of cultivated land quantity and quality also show a pattern of dispersion to concentration.Finally, it drives the spatial transfer of the dominant cultivated land area from the lakeside plain to the southwest hilly area.
【作者單位】： 河北師范大學(xué)資源與環(huán)境科學(xué)學(xué)院;河北省環(huán)境演變與生態(tài)建設(shè)實(shí)驗(yàn)室;河北師范大學(xué)地理學(xué)博士后科研流動(dòng)站;中國(guó)科學(xué)院南京地理與湖泊研究所;河北省城鄉(xiāng)規(guī)劃設(shè)計(jì)研究院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41401646) 河北省自然科學(xué)基金項(xiàng)目(D2015205154) 河北省高等學(xué)校青年拔尖人才計(jì)劃項(xiàng)目(BJ2017024) 河北省社會(huì)科學(xué)基金項(xiàng)目(HB17GL065) 河北省自然地理學(xué)重點(diǎn)學(xué)科項(xiàng)目~~
【分類號(hào)】：F323.211

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