Effects of Soil Compaction Depth on Water in Filtration and Distribution in Different Farmland.Effects of Soil Compaction Depth on Water in Filtration and Distribution in Different Farmland[J].Northern Horticulture,2021,(19):107-113.[doi:10.11937/bfyy.20210988]
不同农田土壤压实层深度对水分入渗和分布的影响
- Title:
- Effects of Soil Compaction Depth on Water in Filtration and Distribution in Different Farmland
- 文献标志码:
- A
- 摘要:
- 以2种土壤包括耕层土（SCK）和压实土（NCK）为研究对象，设置了3个土壤压实层深度5 cm（T1）、10 cm（T2）和15 cm（T3）进行一维入渗土柱模拟试验，研究了水分入渗过程和水分剖面分布情况及土壤不同压实层深度对水分入渗的影响，以期为田间耕作保墒和节水灌溉提供参考依据。结果表明：入渗过程中，初始入渗率较高，后呈幂函数式下降直至稳定入渗率，入渗相同深度时，SCK处理的入渗率显著大于NCK处理，其它处理随着压实层深度的增大，入渗率偏大，但达到稳定入渗率时，随压实深度的加深而逐渐减小；累积入渗量呈先快速增长后稳定增长的趋势，入渗相同深度时，SCK处理的累积入渗量显著大于NCK处理，入渗初期，相同入渗深度，累积入渗量随压实层深度的加深而增大，如水分入渗至5 cm时，T1、T2和T3累积入渗量分别为13.7、13.8、14.1 cm，在入渗后期，相同入渗深度，累积入渗量随压实层深度的增加而减少，如当水分入渗至15~20 cm时，以上处理的累积入渗量则分别为4.7、4.3、4.1 cm；入渗完成后土壤含水量随土层深度的加深而减小，相对于耕层土对照（SCK），压实层的存在显著提高了上层土壤的含水量，并且随着压实土层深度的增加，促进了水分在上层的储存。
- Abstract:
- Two kinds of soil, including surface soil (SCK) and compacted soil (NCK),were used as research object.Three different compaction layers were set up with different depth of 5 cm (T1), 10 cm (T2) and 15 cm (T3).The process and profile distribution of water infiltration and the influence of soil compaction depth on water infiltration were studied,in order to provide a reference for soil tillage and water-saving irrigation.The results showed that the infiltration process，the initial infiltration rate was higher，the power function type was shown after falling until the steady infiltration rate and infiltration depth，SCK treatment of infiltration rate was significantly greater than the NCK，other processing as the compaction layer depth，the greater the infiltration rate，but reach the steady infiltration rate，along with the deepening of compaction depth gradually reduced；cumulative infiltration，first after rapid growth，slow and steady growth of the same depth of infiltration，SCK treatment the cumulative infiltration amount was greater than the NCK，early infiltration，the infiltration depth，cumulative infiltration amount increased along with the deepening of compacted layer depth，such as water infiltration to 5 cm，T1，T2 and T3 cumulative infiltration amount were 13.7 cm，13.8 cm，and 14.1 cm，in the late infiltration，infiltration depth，same cumulative infiltration amount along with the deepening of compaction depth reduction，such as when water infiltration to 15 cm to 20 cm，the cumulative infiltration volume of the above treatments were 4.7 cm，4.3 cm and 4.1 cm，respectively.After infiltration，the soil water content decreased with the depth of soil layer.Compared with the topsoil control (SCK)，the existence of compaction layer significantly increased the soil water content in the upper layer，and with the increase of compaction depth，the storage of water in the upper layer was promoted.The above research results provided a theoretical basis for soil conservation and water-saving irrigation under the condition of soil mechanical compaction.
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备注/Memo
第一作者简介：刘淙琮（1996-），男，硕士研究生，研究方向为农业水土。E-mail：1220981719@qq.com.责任作者：王利书（1982-），女，博士，副教授，现主要从事农业水土等研究工作。E-mail：fc8232@126.com.基金项目：国家重点研发计划子课题资助项目（2017YFD0300905）；河北省自然科学基金资助项目（E2019402468，D2019402151）。收稿日期：2021-03-08