| 马超群,陈桂贤,王丽霞.临潼区土地整理中新增耕地土壤养分现状研究[J].干旱地区农业研究,2012,30(2):47~51 |
| 临潼区土地整理中新增耕地土壤养分现状研究 |
| Analysis of soil nutrients content of newly-increased farmland in the process of land consolidation in Lintong District |
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| DOI：10.7606/j.issn.1000-7601.2012.02.08 |
| 中文关键词: 土壤养分 土地整理 新增耕地 临潼区 |
| 英文关键词:soil nutrients land consolidation newly-increased farmland Lintong District |
| 基金项目:国家自然科学基金（41001374）；中央高校基金（CHD2010JC112） |
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| 中文摘要: |
| 本研究目的在于分析土地整理项目中新增耕地土壤养分含量的特征，明确生产条件改善后影响土地生产能力的重要因素，为更好地发挥土地整理效果提供依据。采集临潼区新丰土地整理项目中道路交通用地、水利设施用地、疏林地和对照样地等4种土地利用类型经整理后的新增耕地17个土壤样品，测定其容重、有机质、全氮、速效磷、速效钾、代换量、pH值和全盐量，运用SPSS统计软件分析土壤养分状况。结果表明：新增耕地土壤养分含量较低，土壤养分中容重、有机质、全氮、速效磷、速效钾、pH值、全盐和代换量含量平均为1.54 g/cm3，5.37 g/kg，0.54 g/kg，5.42 mg/kg，73.23 mg/kg，8.51，573.81 mg/kg和12.41 cmol/kg；原有土地利用类型对养分含量影响较大；土壤中各养分间相关程度较低，容重－有机质、速效钾－代换量和全盐量、代换量－全盐量具有明显相关性，相关系数分别为-0.54，0.58，-0.62和-0.68，其余养分含量之间无明显相关性。可以看出：新增耕地利用时间较短，养分积累不足，土壤有机质含量低是导致肥力较低的主要原因，土壤养分水平成为制约整理后土地生产能力和影响产量差异的的重要因素，应将提高土壤有机质含量作为培肥中心环节。 |
| 英文摘要: |
| The objective of this study is to analyze the characteristics of nutrients content in the soil of the newly-increased farmland in the process of land consolidation and find out the factors that affect land productivity, so as to better the result of land consolidation. 17 soil samples from the newly-increased farmland converted from the former land use types of road, channel and sparse forest were collected in the land consolidation project in Xinfeng of Lintong District. The content of bulk density, soil organic matter, total N, available P, available K, base-exchange capacity, pH and total salt were measured and the characteristics of nutrient content were analyzed with the software of SPSS. The results show that the content of soil nutrients of the newly-increased farmland is low, and the mean values of bulk density, soil organic matter, total N, available P, available K, pH, total salt and base exchange capacity are respectively 1.54 g/cm3, 5.37 g/kg, 0.54 g/kg, 5.42 mg/kg, 73.23 mg/kg, 8.51, 573.81 mg/kg and
12.41 cmol/kg. The former land use types do affect the change of nutrients in different kinds of newly-increased farmland. The correlation between each nutrient is weak. The correlation coefficients of soil bulk density and organic matter
, base-exchange capacity, total salt and available K, base-exchange capacity and total salt are -0.54, 0.58, -0.62 and -0.68. It is concluded that the soil nutrients accumulation of the newly-increased farmland is not at a high level, and the reason is that soil organic matter is low. To improve the oproductivity of newly-increased farmland, more importance should be attached to increasing soil organic matter content through application of both organic and inorganic fertilizers. |
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