本文關(guān)鍵詞： 耕地自然質(zhì)量 空間分布 景觀指數(shù) 空間自相關(guān) 耦合性　出處：《西南農(nóng)業(yè)學(xué)報(bào)》2017年08期 　論文類型：期刊論文

【摘要】：【目的】耕地是人類賴以生存的重要資源,也是土地資源中的精華�！痉椒ā勘疚囊訟rc GIS10.1及其插件Patch Analyst為技術(shù)平臺(tái),對蒲陽鎮(zhèn)在不同海拔高度下耕地景觀格局特征進(jìn)行了分析,并以2010年土地利用變更數(shù)據(jù)和耕地自然質(zhì)量等別補(bǔ)充完善數(shù)據(jù)為基礎(chǔ),結(jié)合SPSS和Geo Da軟件,進(jìn)一步探討了耕地自然質(zhì)量與景觀指數(shù)之間的耦合關(guān)系。【結(jié)果】(1)蒲陽鎮(zhèn)耕地隨海拔升高而斑塊數(shù)量減少,平均規(guī)模變大,破碎化程度越低;這是因?yàn)楹０屋^低的區(qū)域地形相對平坦,人類耕作便利,生產(chǎn)活動(dòng)頻繁。(2)耕地自然質(zhì)量與景觀格局之間存在不同程度的相關(guān)性,耕地自然質(zhì)量與斑塊數(shù)呈現(xiàn)為顯著的正相關(guān),與景觀百分比存在極弱的負(fù)相關(guān)性,僅-0.178;耕地自然質(zhì)量與斑塊平均大小、平均斑塊形狀指數(shù)均表現(xiàn)為顯著的負(fù)相關(guān)。(3)耕地自然質(zhì)量與景觀格局具有一定的空間耦合性,斑塊數(shù)量與耕地自然質(zhì)量在空間上呈現(xiàn)局部空間的相似集聚性,景觀百分比、斑塊平均大小和平均斑塊形狀指數(shù)與耕地自然質(zhì)量則呈現(xiàn)局部空間異質(zhì)性,其中通過顯著性檢驗(yàn)的單元主要集中分布于蒲陽鎮(zhèn)南部、北部以及西北方向�！窘Y(jié)論】景觀指數(shù)隨著海拔變化出現(xiàn)規(guī)律性變化,耕地自然質(zhì)量與各景觀指數(shù)相關(guān)程度存在差異,二者呈現(xiàn)出空間同質(zhì)性與異質(zhì)性并存的現(xiàn)象。
[Abstract]:[objective] cultivated land is not only an important resource for human survival, but also the essence of land resources. [methods] based on Arc GIS10.1 and its plug-in Patch Analyst, the characteristics of cultivated land landscape pattern at different altitudes in Puyang Town were analyzed in this paper. On the basis of 2010 land use change data and cultivated land natural quality and other complementary and perfect data, combined with SPSS and Geo Da software, The coupling relationship between natural quality of cultivated land and landscape index was further discussed. [results] Puyang town cultivated land decreased with elevation, the average scale became larger, and the degree of fragmentation was lower; This is due to the relatively flat topography, convenient cultivation and frequent production activities in the lower elevation areas. There is a different degree of correlation between the natural quality of cultivated land and landscape pattern, and there is a significant positive correlation between the natural quality of cultivated land and the number of patches. There was a very weak negative correlation with the percentage of landscape, only -0.178; the natural quality of cultivated land was significantly negatively correlated with the average size of patches and the average patch shape index, and the average patch shape index was significantly negative correlation with the landscape pattern.) there was a certain spatial coupling between the natural quality of cultivated land and the landscape pattern. The amount of patches and the natural quality of cultivated land were similar to each other in local space, while the landscape percentage, the average patch size and the average patch shape index and the natural quality of cultivated land showed local spatial heterogeneity. The units that passed the significance test were mainly distributed in the south, north and northwest of Puyang Town. [conclusion] the landscape index changed regularly with the change of altitude, and the correlation degree between the natural quality of cultivated land and the landscape index was different. The two show the coexistence of spatial homogeneity and heterogeneity.
【作者單位】： 四川師范大學(xué)西南土地資源評(píng)價(jià)與監(jiān)測教育部重點(diǎn)實(shí)驗(yàn)室;四川師范大學(xué)地理與資源科學(xué)學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(41371120) 四川省教育廳項(xiàng)目(16ZB0061)
【分類號(hào)】：P901;S159

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