本文選題：自然質(zhì)量等 + 空間分異��； 參考：《中國農(nóng)業(yè)資源與區(qū)劃》2017年07期

【摘要】：[目的]通過研究耕地自然質(zhì)量及空間分異規(guī)律,以期對耕地資源的合理利用與保護(hù)進(jìn)行指導(dǎo)。[方法]文章以喀斯特巖溶區(qū)域典型縣石林縣為例,在分等數(shù)據(jù)庫與二調(diào)數(shù)據(jù)庫銜接基礎(chǔ)上,采用GIS空間分析法、數(shù)理統(tǒng)計法,對表征耕地自然質(zhì)量的因子自然質(zhì)量等的空間分異規(guī)律進(jìn)行探討。[結(jié)果](1)不同行政區(qū)域內(nèi)自然質(zhì)量等集中程度差異顯著,分異規(guī)律明顯;各行政區(qū)域內(nèi)分布規(guī)律高度相似,以中心城鎮(zhèn)為最優(yōu),呈同心圓向外圍輻射發(fā)散趨劣。平均自然質(zhì)量等由優(yōu)趨劣依次為長湖、鹿阜、圭山、西街口、大可。(2)不同耕地利用類型自然質(zhì)量等分布差異不大;各耕地利用類型等別集中差異顯著:水田、水澆地等別較高,多集中連片分布在壩區(qū)、河谷沿岸,旱地等別較低,多為零星分散的緩坡耕地。平均自然質(zhì)量等水澆地略優(yōu)于水田,旱地最差。(3)受大尺度光溫、氣候生產(chǎn)潛力指數(shù)影響,自然質(zhì)量等在不同海拔梯度間耕地等別分布差異不大,且等別集中程度高度相似。從整體看,耕地等別隨海拔梯度升高呈現(xiàn)降低趨勢,部分區(qū)域小幅反彈。[結(jié)論]耕地自然質(zhì)量作為耕地的本底質(zhì)量,在縣域尺度具有獨特的分異規(guī)律。
[Abstract]:[objective] to guide the rational utilization and protection of cultivated land resources by studying the laws of natural quality and spatial differentiation of cultivated land. [methods] taking Shilin County, a typical karst county in karst area, as an example, the paper adopts GIS spatial analysis method and mathematical statistics method on the basis of the connection between graded database and binary database. This paper discusses the spatial differentiation law of factors such as natural quality which characterizes the natural quality of cultivated land. [results] (1) the degree of concentration of natural quality in different administrative regions was significantly different, the law of differentiation was obvious, the distribution law of each administrative region was highly similar, the central town was the best, and the radiation of concentric circle to the periphery was worse. The order of average natural quality is Changhu Lake, Lufu, Guishan, Xijie Kou, Dake. 2) the distribution of natural quality of different cultivated land use types is not different, and the difference of different cultivated land use types is significant: paddy field, irrigated land, etc. Most of them are distributed in dam area, river valley, dry land and so on, most of them are scattered gentle slope cultivated land. The average natural quality of irrigated land is a little better than that of paddy field, and the worst of dryland is affected by large scale light and temperature, climatic productive potential index, natural quality and so on. The distribution of cultivated land in different elevation gradients is not different, and the degree of isotropic concentration is highly similar. As a whole, cultivated land and so on showed a decreasing trend with the elevation gradient, and some regions rebounded slightly. [conclusion] as the background quality of cultivated land, the natural quality of cultivated land has a unique differentiation law at the county scale.
【作者單位】： 云南農(nóng)業(yè)大學(xué)水利學(xué)院;云南農(nóng)業(yè)大學(xué)國土資源科學(xué)技術(shù)工程研究中心;國土資源部"土地利用——云南陸良野外基地";云南省土地資源利用與保護(hù)工程實驗室;
【基金】：十二五國家科技支撐計劃課題“西南睦邊扶貧區(qū)基本農(nóng)田建設(shè)技術(shù)研究與示范”(2015BAD06B04)
【分類號】：F323.211

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