本文選題：耕地生態(tài)安全 + 障礙度��； 參考：《水土保持研究》2017年01期

【摘要】：耕地生態(tài)安全預(yù)警對(duì)改善耕地生態(tài)安全水平,保障糧食安全具有重要的意義。以河南省糧食主產(chǎn)區(qū)新鄭市為研究對(duì)象,基于壓力、狀態(tài)、響應(yīng)(P-S-R)和生態(tài)、環(huán)境、經(jīng)濟(jì)、社會(huì)(E-E-E-S)框架模型,構(gòu)建了耕地生態(tài)安全預(yù)警指標(biāo)體系。引入變權(quán)理論確定指標(biāo)權(quán)重,運(yùn)用改進(jìn)物元可拓模型確定新鄭市2001—2010年耕地生態(tài)安全預(yù)警等級(jí),并采用障礙度模型分析耕地生態(tài)安全障礙因子。結(jié)果表明:2001—2010年新鄭市耕地生態(tài)安全水平總體呈現(xiàn)上升趨勢(shì),預(yù)警等級(jí)由Ⅲ級(jí)(預(yù)警)上升為Ⅳ級(jí)(較安全);2009—2010年預(yù)警等級(jí)雖處于較安全(Ⅳ級(jí)),但有下降趨勢(shì)。制約新鄭市耕地生態(tài)安全水平的主要障礙因子是地均化肥使用強(qiáng)度、耕地復(fù)種指數(shù)、人均糧食產(chǎn)量、城市化水平、耕地墾殖率、人口自然增長(zhǎng)率、人均水資源量、地均地膜使用強(qiáng)度、第三產(chǎn)業(yè)占GDP比重、農(nóng)業(yè)經(jīng)濟(jì)比重、未利用土地比重等,這些因子應(yīng)是今后改善新鄭市耕地生態(tài)安全的重點(diǎn)。
[Abstract]:Early warning of cultivated land ecological security plays an important role in improving the level of cultivated land ecological security and ensuring food security. Taking Xinzheng City, the main grain producing area of Henan Province, as the research object, based on pressure, state, response P-S-R) and the framework model of ecology, environment, economy and society, the early warning index system of ecological security of cultivated land was constructed. The variable weight theory is introduced to determine the index weight, the improved matter-element extension model is used to determine the ecological security of cultivated land in Xinzheng City from 2001 to 2010, and the obstacle degree model is used to analyze the obstacle factors of cultivated land ecological security. The results showed that the level of ecological security of cultivated land in Xinzheng city from 2001 to 2010 showed an upward trend, and the level of early warning increased from grade 鈪，

本文編號(hào)：1821806