本文選題：耕地質(zhì)量提升　切入點(diǎn)：限制因子　出處：《中國生態(tài)農(nóng)業(yè)學(xué)報(bào)》2017年03期 　論文類型：期刊論文

【摘要】：耕地是保證國家糧食安全的先決條件,也是保障社會(huì)安全及社會(huì)可持續(xù)發(fā)展的物質(zhì)基礎(chǔ)。中國耕地總體數(shù)量基數(shù)大,但整體的質(zhì)量水平卻很低。為明確耕地整治方向,針對(duì)不同地區(qū)進(jìn)行不同重點(diǎn)的耕地整治,本文基于秦皇島盧龍縣農(nóng)用地分等定級(jí),構(gòu)建耕地質(zhì)量評(píng)價(jià)指標(biāo)體系,運(yùn)用得分因子標(biāo)識(shí)法,確定限制因子組合類型,引入障礙度模型對(duì)限制因子組合進(jìn)行修正,對(duì)盧龍縣進(jìn)行限制因子重點(diǎn)區(qū)域劃定。結(jié)果顯示,盧龍縣15 981個(gè)耕地地塊都存在高限制因子,匯總95種限制因子組合類型,共計(jì)43 909.71 hm~2。引入障礙度模型修正后盧龍縣耕地可劃分為5個(gè)主導(dǎo)限制因子重點(diǎn)區(qū)域:道路通達(dá)度限制因子主導(dǎo)區(qū)、地形坡度限制因子主導(dǎo)區(qū)、灌溉保證率限制因子主導(dǎo)區(qū)、農(nóng)田防護(hù)林比率限制因子主導(dǎo)區(qū)和有效土層厚度限制因子主導(dǎo)區(qū);其中農(nóng)田防護(hù)林比率限制因子主導(dǎo)區(qū)整治面積最大,為37 680.91 hm~2,占耕地總面積的85.81%,主要分布在盧龍鎮(zhèn)、燕河營鎮(zhèn)和雙望鎮(zhèn);其次為有效土層厚度限制因子主導(dǎo)區(qū),面積為3 861.32 hm~2,主要分布在印莊鄉(xiāng);道路通達(dá)度限制因子主導(dǎo)區(qū)整治面積為1 876.16 hm~2,主要分布在雙望鎮(zhèn);灌溉保證率限制因子主導(dǎo)區(qū)整治面積為319.44 hm~2,主要分布在燕河營鎮(zhèn);地形坡度限制因子主導(dǎo)區(qū)整治面積最小,為171.87 hm~2,占耕地總面積的0.39%,主要分布在劉田各莊鎮(zhèn)。結(jié)合重點(diǎn)區(qū)域內(nèi)限制因子可知,盧龍縣主要限制因子以農(nóng)田防護(hù)林比率和有效土層厚度為主,灌溉保證率和道路通達(dá)度為輔;在進(jìn)行耕地整治時(shí),可重點(diǎn)加強(qiáng)防護(hù)林建設(shè),增加有效土層厚度,改良土壤,提高土壤肥力,加強(qiáng)農(nóng)田設(shè)施及田間道路建設(shè),確保糧食穩(wěn)中增產(chǎn),保障區(qū)域內(nèi)糧食安全。研究結(jié)果可為丘陵山區(qū)整治規(guī)劃、劃定耕地質(zhì)量提升重點(diǎn)區(qū)域提供技術(shù)支持,為今后耕地整治提供科學(xué)依據(jù)。
[Abstract]:The cultivated land is the precondition of ensuring national food security, but also a material foundation for the sustainable development of social security and social. The number of the large number of arable land in Chinese, but the overall level of quality is very low. In order to clear the cultivated land cultivated land consolidation in different direction, focusing on the different regions, the agricultural land grading based on Qinhuangdao County of Lulong the quality of cultivated land, construct the evaluation index system, using factor score mark method to determine the limiting factor combination type introduction obstacle degree model to limit factor combination correction of limiting factors in key areas of Lulong County, Lulong county. The results showed that 15981 of cultivated land are high limiting factors, summary 95 restriction factors combination type a total of 43909.71, hm~2. into the obstacle degree model of cultivated land in Lulong county can be divided into 5 main limiting factors in key areas: Road accessibility limit For the main factor, topography factor limiting dominant area, irrigation guarantee rate limiting factor leading area, farmland shelterbelt ratio limit factor dominant area and effective soil thickness limiting factor which leading area; farmland shelterbelt ratio restriction factor leading area remediation area is the largest, 37680.91 hm~2, accounting for 85.81% of the total area of cultivated land, mainly in the Lulong Town, yanheying town and double Wang Zhen; second is the effective thickness limiting factor leading area, area of 3861.32 hm~2, mainly distributed in India township; road accessibility limiting factor leading area remediation area is 1876.16 hm~2, mainly in the double at town; irrigation guarantee rate limiting factor leading area remediation area 319.44 hm~2, mainly distributed in the town of Yan River; slope limiting factor leading area remediation area and the lowest is 171.87 hm~2, accounting for 0.39% of the total area of cultivated land, mainly distributed in the town of Liu Tian. The key limiting factor within the region shows that the main limiting factor in Lulong county farmland shelterbelt ratio and effective soil depth, irrigation guarantee rate and road accessibility in supplement; cultivated land consolidation, can focus on strengthening the construction of protection forest, increasing the thickness of effective soil, improve soil, improve soil fertility, strengthen farmland facilities and field road the construction, ensure steady increase in grain production, ensure food security in the region. The results can be used for the hilly area planning, provide technical support to improve the quality of farmland in key areas, and provide scientific basis for future land remediation.

【作者單位】： 河北農(nóng)業(yè)大學(xué)國土資源學(xué)院;河北農(nóng)業(yè)大學(xué)商學(xué)院;河北農(nóng)業(yè)大學(xué)資源與環(huán)境科學(xué)學(xué)院;
【基金】：河北省高等學(xué)�？茖W(xué)技術(shù)研究優(yōu)秀青年基金項(xiàng)目(Y2012015) 河北省科技廳平臺(tái)項(xiàng)目(13967502D)資助~~
【分類號(hào)】：F323.211
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本文編號(hào)：1648897