【摘要】：研究目的:從影響耕地地力的土壤管理、理化性質(zhì)、土壤養(yǎng)分、剖面性狀、立地條件和氣候條件等6個方面選取13個評價指標對東北典型黑土區(qū)耕地地力進行綜合評價,并在評價基礎(chǔ)上進行障礙因素診斷,為今后定量化分析耕地地力障礙因素提供方法。研究方法:該研究運用層次分析法和模糊數(shù)學法等方法進行耕地地力評價,并引入障礙度模型對影響該區(qū)域耕地地力的障礙因素進行定量化分析。研究結(jié)果:(1)東北典型黑土區(qū)耕地地力整體呈現(xiàn)南高北低的趨勢,其中以中等地(四、五、六、七等地)為主,占研究區(qū)總耕地面積的64.47%;其次為高等地(一、二、三等地),占研究區(qū)總耕地面積的28.31%;低等地(八、九、十等地)最少,只占研究區(qū)總耕地面積的7.22%;(2)對研究區(qū)評價指標體系中耕層厚度、有機質(zhì)、有效磷、p H、灌溉能力、排澇能力6個指標進行障礙度分析,發(fā)現(xiàn)除有效磷和p H對耕地地力障礙作用不明顯外,其他因素均有明顯障礙作用,且障礙程度呈現(xiàn)一定的規(guī)律性。研究結(jié)論:(1)通過對研究區(qū)進行耕地地力評價,對東北典型黑土區(qū)的耕地數(shù)量和質(zhì)量在空間分布特征上有了全面掌握,為今后耕地的合理利用提供了依據(jù);(2)障礙度模型的引入為分析影響耕地地力的障礙因素提供了定量化的研究方法,為耕地地力保護和提升研究提供了方法支撐。
[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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本文編號：2377847