ZHENG Boyi,FAN Haoming.Vertical Variation of Surface Soil Moisture in Ridge Tillage Farmland of Northeast Black Soil Region in China in Cold Season[J].Research of Soil and Water Conservation,2016,23(02):28-33.
东北黑土区垄作农田寒季表土水分垂直变化特征
- Title:
- Vertical Variation of Surface Soil Moisture in Ridge Tillage Farmland of Northeast Black Soil Region in China in Cold Season
- Keywords:
- slope position; slope aspect; freezing period; surface soil; moisture migration; northeast black soil region
- 分类号:
- S152.7
- 摘要:
- 土壤水分变化受地形地貌、土壤质地、土地利用方式等多种因素的影响。在冻结期内，不同地表环境下土壤水分变化有明显的不同。土壤水分含量的变化又会对冻结和融化过程中土壤物理性质产生影响，进而影响土壤的抗蚀性。为探究表土水分在冻结期内的变化过程，采用野外试验方法，对东北黑土区内四种典型旱地土壤寒季表土水分变化进行研究，结果表明：2014—2015年不同地区0—30 cm表层土壤水分在冻结初期增加幅度较大，增加量大小为棕壤（西丰） > 白浆化暗棕壤（梅河口） > 黑土（海伦） > 暗棕壤（扎兰屯），平均增加了3.1%，2.7%，2.5%，0.7%。随着土壤冻结过程的持续，土壤水分增加量减少。垂直方向上，冻结期内四种土壤在0—10 cm土层水分含量平均值为海伦（35.3%）、西丰（27.1%）、梅河口（21.1%）、扎兰屯（24.1%），均高于其他土层。在坡面尺度上，由于不同坡位土壤、地形、耕地应用格局空间分布不同，进而影响水分向表层的迁移量。坡向对寒季表土水分变化的影响在不同地区表现不同。
- Abstract:
- Soil moisture is affected by land use type, topography and geomorphology, soil texture and other factors. In the freezing period, soil moisture changes in different earth surface environment are obviously different. The change of soil moisture content will have an impact on the physical properties of the soil in the process of freezing and thawing, thereby affecting the soil anti erosion. For the inquiry of topsoil moisture in the change process of freezing period, we used field experiment method to examine four kinds of typical upland soil surface moisture change in northeast black soil region. The results showed that 0—30 cm surface soil moisture in different areas increased larger a lot at the beginning of the freezing, the increase in cotens followed the sequence: Brown soil (Xifeng) > Albic soil (Meihekou) > Black soil(Hailun) > Dark brown soil (Zhalantun), increased by 3.1%, 2.7%, 2.5%, 0.7%. As the soil freezing process continued, the increase in contents reduced. In vertical direction, average soil water contents in 0—10 cm layer of four kinds of soils were 35.3% (Helen), 27.1% (Xifeng), 21.1% (Meihekou), 24.1% (Zalantun) which were higher than other soil layers. On slope scale, the spatial distribution pattern of soil, topography, and cultivated land application affects the amount of moisture migration to the surface. The influence of the slope aspect on surface soil moisture change is different in different areas in cold season.
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备注/Memo
收稿日期:2015-10-12;改回日期:2015-11-03。
基金项目:国家自然科学基金“东北黑土低山丘陵区融雪侵蚀机理与过程研究”（41371272）
作者简介:郑博艺(1991-),男,辽宁沈阳人,硕士研究生,主要研究方向:水土流失监测与控制。E-mail:13214251167@163.com
通讯作者:范昊明(1972-),男,吉林白山人,博士,教授,主要研究方向:流域侵蚀、产沙与水土保持规划。E-mail:fanhaoming@163.com