红壤区肥液浓度对涌泉根灌水氮运移特性的影响

代智光; 王萍根; 谢方杰; 周志鹏

doi:10.13870/j.cnki.stbcxb.2020.01.049

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红壤区肥液浓度对涌泉根灌水氮运移特性的影响

更新时间：2025-03-12

- 红壤区肥液浓度对涌泉根灌水氮运移特性的影响
- Effects of Fertilizer Concentration on Water-Nitrogen Transport Characteristics Under Surge Root Irrigation for Red Soil
- 水土保持学报 2020年34卷第1期页码：344-349
- 作者机构：
  
  南昌工程学院水利与生态工程学院,南昌,330099
- 作者简介：
- 基金信息：
  
  江西省教育厅研究项目（GJJ180952）江西省科技厅研究项目（20192BAB216037）中国农科院水资源安全高效利用重点开发实验室开放基金项目（2019BB02）
- DOI：10.13870/j.cnki.stbcxb.2020.01.049
  中图分类号： S275
- 纸质出版：2020
- 稿件说明：
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代智光, 王萍根, 谢方杰, 等. 红壤区肥液浓度对涌泉根灌水氮运移特性的影响[J]. 水土保持学报, 2020,34(1):344-349.

DAI Zhiguang, WANG Pinggen, XIE Fangjie and ZHOU Zhipeng. Effects of Fertilizer Concentration on Water-Nitrogen Transport Characteristics Under Surge Root Irrigation for Red Soil[J]. 2020, 34(1): 344-349.
代智光, 王萍根, 谢方杰, 等. 红壤区肥液浓度对涌泉根灌水氮运移特性的影响[J]. 水土保持学报, 2020,34(1):344-349. DOI： 10.13870/j.cnki.stbcxb.2020.01.049.

DAI Zhiguang, WANG Pinggen, XIE Fangjie and ZHOU Zhipeng. Effects of Fertilizer Concentration on Water-Nitrogen Transport Characteristics Under Surge Root Irrigation for Red Soil[J]. 2020, 34(1): 344-349. DOI： 10.13870/j.cnki.stbcxb.2020.01.049.

摘要

为提高红壤区涌泉根灌水氮利用效率，通过室内肥液入渗试验，研究了不同肥液浓度（0，10，20，35，60 g/L）条件下涌泉根灌土壤的入渗能力、湿润锋运移距离、土壤水分分布以及铵态氮和硝态氮的运移特性，并建立了红壤涌泉根灌土壤累计入渗量及湿润锋在竖直向上、竖直向下和水平方向的运移距离与肥液浓度的关系模型。结果表明：土壤累计入渗量、湿润锋运移距离以及湿润体内水分和氮素的分布均受到肥液浓度的影响。在同-入渗时刻，土壤累计入渗量及湿润锋运移距离随肥液浓度的增大而增大，且与入渗历时均呈幂函数关系；在灌水结束时，相同土层深度内，肥液浓度越大，土壤含水率就越大，土壤中铵态氮和硝态氮的浓度也越大，且与铵态氮相比，硝态氮的分布范围更广。随着肥液再分布的进行，土层内最大含水率位置逐渐下移，且土壤含水率的分布也更加均匀；土壤中铵态氮和硝态氮浓度的变化趋势不同，浅层中铵态氮的浓度逐渐降低，而硝态氮的浓度先降低后增加；深层中铵态氮的浓度先增加后降低，而硝态氮的浓度逐渐增加。该研究成果可为进-步研究红壤区涌泉根灌肥液入渗氮素运移及转化提供理论参考。

Abstract

In order to improve the utilization efficiency of water and nitrogen in the red soil under surge root irrigation

through an indoor fertilizer infiltration test

the soil infiltration capacity

wetting front migration

soil moisture

and the migration characteristics of ammonium nitrogen and nitrate nitrogen were studied under different fertilizer concentrations (0

60 g/L)

and the relational model between cumulative infiltration volume

the wetting front migration distance and the fertilizer concentration were established. The results showed that:The cumulative infiltration volume

the wet front migration distance

and the migration and distribution of water and nitrogen in the wet body were all affected by the fertilizer concentration. At the same infiltration time

the cumulative infiltration volume and the wet front migration distance all increased with the increase of the fertilizer concentration

and they all had a power function relationship with the infiltration duration. At the end of irrigation

the greater the concentration of fertilizer was

the greater the soil moisture content was

and the greater the concentration of ammonium nitrogen and nitrate nitrogen was for the same soil depth

and the distribution of nitrate nitrogen was wider than ammonium nitrogen. With the redistribution of fertilizer solution

the position of maximum moisture content went down gradually

and the distribution of moisture content was more uniform. The changes of ammonium nitrogen and nitrate nitrogen concentration were different between the shallow and deep layer of soil. In the shallow layer

the concentration of ammonium nitrogen gradually decreased

while the concentration of nitrate nitrogen decreased first and then increased. In the deep layer

the concentration of ammonium nitrogen increased first and then decreased

while the concentration of nitrate nitrogen showed a gradually increasing trend. The research results could provide a theoretical reference for further study on the nitrogen transport and transformation of surge-root irrigation in the red soil region.

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references

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