| 刘小宁,隆瑞红,罗珠珠,蔡立群,董博.甘肃省典型土壤持水特性及影响因素研究[J].干旱地区农业研究,2017,35(1):143~151 |
| 甘肃省典型土壤持水特性及影响因素研究 |
| Research on water-holding capacity and related factors in typical soils of Gansu province |
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| DOI：10.7606/j.issn.1000-7601.2017.01.22 |
| 中文关键词: 甘肃省典型土壤 土壤水分特征曲线 比水容量 土壤物理性质 影响因素 |
| 英文关键词:typical soil of Gansu province soil water characteristic curve specific water capacity soil physical properties influencing factors |
| 基金项目:甘肃省自然科学基金项目(145RJZA106) |
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| 中文摘要: |
| 研究了甘肃省14个类型区12种典型土壤的物理性质，并测得不同水势下的土壤重量含水量，利用Gardner经验方程拟合出其土壤水分特征曲线，对不同土壤的持水性及其影响因素作了研究。结果表明：甘肃省典型土壤持水能力差异明显，整体而言，甘南高原类型区土壤持水和供水能力较好，区内典型土壤拟合参数A值均在20以上，且较为稳定；陇南山地丘陵类型区土壤供水能力最佳，持水能力较好，区内典型土壤拟合参数A值均在24以上，但稳定性较弱；黄土高原类型区内土壤持水性适中，供水能力较弱，稳定性最佳；河西干旱半干旱类型区的土壤持水、供水能力及稳定性均较差，区内典型土壤除潮土外拟合参数A值均在17以下；土壤质地（＜0.002 mm粘粒含量）、总孔隙度对甘肃省土壤的持水性影响最为显著，其次为土壤毛管孔隙度、密度和容重。 |
| 英文摘要: |
| The soil water-holding capacity is evidence to measure the absorption and holding abilities of soil. This research studied twelve soil physical properties in four soil areas from Gansu, and measured the gravity moisture content in different soil suctions, utilized the Gardner experience equation to plot a soil water characteristic curve, and investigated the typical soil water-holding capacity and the influencing factors. The results show that there are significant variationsfortypical soil water-holding capacities in Gansu. In general, the soil water-holding capacity and water supply lability in the Gannan plateau are superior and stable, and the parameter A of typical soil in this region all exceeded 20. The best soil water supply ability belongs to the mountainous and hilly regionin Longnan, with parameter A value of typical soil reaching 24. Its water-holding capacity is good, but the stability is weak. The soil in the Loess Plateau has moderate water-holding ability and feeble water supply, as well as the best stability, compared with the other research areas. Both soil water-holding capacity, water supply capacity and the stability in the Hexiarid and semi-arid regionsare poor, the parameter A of this typical soil was all lower than 17, except for the fluvo-aquic soil. In addition, soil texture(<0.002 mm clay content) and total porosity affect the soil water-hold capacity obviously, followed by capillary porosity, density and volume weight. |
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