YANG Chun-bao,ZOU Wen-xiu,JIANG Heng,et al.Effect of Water Treatments on Soil Water Dynamics in Soybean Field of Mollisols Area in Northeast China[J].Soybean Science,2014,33(01):73-78.[doi:10.11861/j.issn.1000-9841.2014.01.0073]
黑土区不同水分处理对大豆田土壤含水量动态变化的影响
- Title:
- Effect of Water Treatments on Soil Water Dynamics in Soybean Field of Mollisols Area in Northeast China
- 文章编号:
- 1000-9841（2014）01-0073-06
- 分类号:
- S565.1
- 文献标志码:
- A
- 摘要:
- 基于中国科学院海伦农田生态系统国家野外科学观测试验站内控水试验场的定位试验，研究了不同土壤进水量（降水和灌溉水之和）对剖面土壤水分运移的影响。结果表明:过量水分（I1）、适宜水分（I2）、干旱（I3）和自然降水（R）影响土壤剖面的深度为0～130 cm；I1处理试验期间土壤累计进水量为514 mm，土壤水分入渗的最大深度为110 cm。I3处理0～90 cm土层土壤储水量较其他处理平均减少了38 mm，说明黑土处于干旱状态时0～90 cm土层内土壤水分均能供给大豆生长需要。受土壤进水量的影响I1和R，I2和I3处理0～150 cm土层土壤储水量的季节性变化分别表现出相似的趋势。因此，水分进入土壤的频率和量是影响剖面土壤水分变异的主要因子，当土壤发生干旱时能加深土壤水分的循环深度；同时黑土具有强大的水分调节能力，对于调节季节性干旱具有重要作用。
- Abstract:
- Black soil had strong water capacity.The impact of different water entry amount(precipitation+irrigation)including excessive water(I1),suitable water(I2),drought(I3)and rainfed(R)treatments on the migration of soil water in soil profile was conducted based on controlled water treatment located in Hailun Agricultural Ecology Station of Chinese Academy of Sciences.The soil profile impacted by different water entry amount was as deep as 130 cm.For I1 treatment,the water infiltrated depth was 110 cm and the accumulated water entry was as high as 514 mm during soybean growing season.Compared with other treatments,soil water storage in 0-90 cm soil layer reduced 38 mm in I3,suggesting soil water stored in 0-90 cm soil layer could be utilized by soybean under drought stress.The similar temporal variation of soil water storage in 0-150 cm soil layer was observed in R and I1,I2 and I3,respectively.Therefore,the variation of soil water in soil profile was affected by the frequency and amount of water entry,water cycle depth increased when soil was in drought status.It also suggested that black soil has strong soil water regulation capacity,which was very important for the occurrence of seasonal drought.
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备注/Memo
基金项目：中国科学院黑土区农业生态重点实验室开放基金；国家自然科学基金（41101208）; 国家重点基础研究发展计划“973计划”（2011CB100506）。