东北典型黑土区耕地地力评价与障碍因素诊断
发布时间：2018-12-14 03:38
【摘要】：研究目的:从影响耕地地力的土壤管理、理化性质、土壤养分、剖面性状、立地条件和气候条件等6个方面选取13个评价指标对东北典型黑土区耕地地力进行综合评价,并在评价基础上进行障碍因素诊断,为今后定量化分析耕地地力障碍因素提供方法。研究方法:该研究运用层次分析法和模糊数学法等方法进行耕地地力评价,并引入障碍度模型对影响该区域耕地地力的障碍因素进行定量化分析。研究结果:(1)东北典型黑土区耕地地力整体呈现南高北低的趋势,其中以中等地(四、五、六、七等地)为主,占研究区总耕地面积的64.47%;其次为高等地(一、二、三等地),占研究区总耕地面积的28.31%;低等地(八、九、十等地)最少,只占研究区总耕地面积的7.22%;(2)对研究区评价指标体系中耕层厚度、有机质、有效磷、p H、灌溉能力、排涝能力6个指标进行障碍度分析,发现除有效磷和p H对耕地地力障碍作用不明显外,其他因素均有明显障碍作用,且障碍程度呈现一定的规律性。研究结论:(1)通过对研究区进行耕地地力评价,对东北典型黑土区的耕地数量和质量在空间分布特征上有了全面掌握,为今后耕地的合理利用提供了依据;(2)障碍度模型的引入为分析影响耕地地力的障碍因素提供了定量化的研究方法,为耕地地力保护和提升研究提供了方法支撑。
[Abstract]:Objective: to select 13 evaluation indexes from 6 aspects, such as soil management, physical and chemical properties, soil nutrients, profile characters, site conditions and climate conditions, to evaluate cultivated land fertility in typical black soil areas of Northeast China. On the basis of evaluation, the diagnosis of obstacle factors is carried out, which provides a method for the quantitative analysis of land fertility obstacle factors in the future. Methods: the method of analytic hierarchy process (AHP) and fuzzy mathematics were used to evaluate cultivated land fertility, and the obstacle degree model was introduced to quantitatively analyze the obstacle factors that affect the cultivated land fertility in this area. The results are as follows: (1) the cultivated land fertility in the typical black soil area of Northeast China shows the trend of south high and north low, in which the middle land (four, five, six, seven and so on) is the main one, accounting for 64.47% of the total cultivated land area in the study area; The second is higher land (first, second, third class), which accounts for 28.31% of the total cultivated land area in the study area, and the lowest (8, 9, 10) is the lowest, accounting for only 7.22% of the total cultivated land area in the study area. (2) based on the analysis of six indexes of tillage layer thickness, organic matter, available phosphorus, p H, irrigation ability and drainage capacity in the evaluation index system of the study area, it was found that the effect of available phosphorus and pH on farmland fertility barrier was not obvious. Other factors all have obvious obstacle effect, and the degree of obstacle presents certain regularity. The conclusions are as follows: (1) through the evaluation of cultivated land fertility in the study area, the quantity and quality of cultivated land in the typical black soil area of Northeast China have been comprehensively grasped in terms of spatial distribution characteristics, which provides the basis for the rational utilization of cultivated land in the future; (2) the introduction of the obstacle degree model provides a quantitative research method for the analysis of the obstacle factors affecting the cultivated land fertility, and provides a method support for the research on the protection and promotion of cultivated land fertility.
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本文编号：2377847
[Abstract]:Objective: to select 13 evaluation indexes from 6 aspects, such as soil management, physical and chemical properties, soil nutrients, profile characters, site conditions and climate conditions, to evaluate cultivated land fertility in typical black soil areas of Northeast China. On the basis of evaluation, the diagnosis of obstacle factors is carried out, which provides a method for the quantitative analysis of land fertility obstacle factors in the future. Methods: the method of analytic hierarchy process (AHP) and fuzzy mathematics were used to evaluate cultivated land fertility, and the obstacle degree model was introduced to quantitatively analyze the obstacle factors that affect the cultivated land fertility in this area. The results are as follows: (1) the cultivated land fertility in the typical black soil area of Northeast China shows the trend of south high and north low, in which the middle land (four, five, six, seven and so on) is the main one, accounting for 64.47% of the total cultivated land area in the study area; The second is higher land (first, second, third class), which accounts for 28.31% of the total cultivated land area in the study area, and the lowest (8, 9, 10) is the lowest, accounting for only 7.22% of the total cultivated land area in the study area. (2) based on the analysis of six indexes of tillage layer thickness, organic matter, available phosphorus, p H, irrigation ability and drainage capacity in the evaluation index system of the study area, it was found that the effect of available phosphorus and pH on farmland fertility barrier was not obvious. Other factors all have obvious obstacle effect, and the degree of obstacle presents certain regularity. The conclusions are as follows: (1) through the evaluation of cultivated land fertility in the study area, the quantity and quality of cultivated land in the typical black soil area of Northeast China have been comprehensively grasped in terms of spatial distribution characteristics, which provides the basis for the rational utilization of cultivated land in the future; (2) the introduction of the obstacle degree model provides a quantitative research method for the analysis of the obstacle factors affecting the cultivated land fertility, and provides a method support for the research on the protection and promotion of cultivated land fertility.
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本文编号：2377847
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