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Position: Home > Articles > Study on the Formation Mechanism of Interflow Under the Influence of Plough Pan and Root System Water Saving Irrigation 2017 (6) 1-5

犁底层及作物根系影响下壤中流形成机理研究

作  者：
孔达;王立权;董文财;付强
单  位：
黑龙江大学水利电力学院;东北农业大学水利与土木工程学院
关键词：
黑土区;犁底层;大豆根系;壤中流;产流条件
摘  要：
为了研究犁底层及作物根系影响下壤中流的形成机理,以我国东北黑土区大豆坡耕地为研究对象,试验设计测定有、无犁底层及大豆根系条件下土壤物理特性、土壤水分湿润峰迁移和鼓粒期大豆根系形态。结果表明,研究区降雨强度小于16.8 mm/h时,犁底层以上土壤含水量超过49.8 mm产生壤中流;降雨强度大于16.8 mm/h时,假定在犁底层位置处土壤含水量超过田间持水量,湿润峰到达犁底层处且含水量等于田间持水量时土壤水分剖面形状相同,产生壤中流。基于以上假定构建壤中流产流时刻模拟模型,利用模型对裸土及大豆根系影响下壤中流产流时间进行模拟,相对误差为6.6%和0.4%,说明该模型适用于犁底层及大豆根系影响下壤中流产流时间的预测,同时也说明以上假定的合理性。
译  名：
Study on the Formation Mechanism of Interflow Under the Influence of Plough Pan and Root System
作  者：
KONG Da;WANG Li-quan;DONG Wen-cai;FU Qiang;College of Water Conservancy and Electric Power,Heilongjiang University;School of Water Conservancy and Civil Engineering,Northeast Agricultural University;
关键词：
black soil region;;plough pan;;soybean root system;;interflow;;production flow condition
摘  要：
In order to study the response mechanism of interflow to soybean roots and plough pan for black soil slope farmland under the influence of rainfall,an experimental design is used to determine the physical characteristics of soil with and without plough pan and soybean root system,the migration of soil moisture during rainfall and the root morphology of soybean during the grain filling stage. The results show that when the rainfall intensity is less than 16.8 mm per hour in study area,the interflow forms at the plough pan with total soil water content more than 49.7mm. When the rainfall intensity is greater than 16.8mm per hour,assuming that soil moisture profile has the same shape when soil moisture is more than the field capacity in the upper edge of plough pan and the humid peak water is equal to the field capacity,the interflow will appear. A model is built to calculate interflow time and field experiments are carried out to verify the applicability of this model. The interflow appearance times for bare soil and soil covered with soybean under plough pan and soybean root influence conditions are simulated by the model,the relative errors are 6.6% and 0.4%,suggesting that the model is suitable for the interflow appearance time prediction under the conditions of plough pan and soybean roots influence for slope farmland on black soil region. It also illustrates the rationality of the above assumptions.

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