Effects of Straw Incorporation and Decomposition on Soil Preferential Flow Patterns Using the Dye-Tracer Method
Preferential pathways in soil lead to nutrient leaching and groundwater contamination. However, the evolution of preferential flow with straw application remains uncertain. This study aims to experimentally determine the hypothesis that, depending on how it is applied, straw will either promote or i...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-01-01
|
| Series: | Agriculture |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-0472/14/2/201 |
| _version_ | 1797299211956387840 |
|---|---|
| author | Zhengyu Duan Ce Wang Chengli Zhu Xiaoan Chen Yaming Zhai Liang Ma Nan Sun Jiahao Cai Yu Fu |
| author_facet | Zhengyu Duan Ce Wang Chengli Zhu Xiaoan Chen Yaming Zhai Liang Ma Nan Sun Jiahao Cai Yu Fu |
| author_sort | Zhengyu Duan |
| collection | DOAJ |
| description | Preferential pathways in soil lead to nutrient leaching and groundwater contamination. However, the evolution of preferential flow with straw application remains uncertain. This study aims to experimentally determine the hypothesis that, depending on how it is applied, straw will either promote or inhibit the movement of soil preferential flow. Treatments with straw application rates of 0, 5, 10, and 15 t/ha and decomposition time points of 0, 60, and 240 d were set up for the potassium iodide–starch dye-tracer method. The results showed that the straw decomposition rate slowed down in the later stages. At 0 d, the preferential flow coefficients of straw application of 0, 5, 10, and 15 t/ha were 0.13, 0.14, 0.23, and 0.17, respectively. At 60 d, the preferential flow coefficients were approximately 0.17, 0.11, 0.22, and 0.12. Soil properties and irrigation quality improved at 0 d and 60 d. However, a marked increase of 0.31, 0.35, and 0.17 in the preferential flow coefficient was observed at 240 d. Soil properties and irrigation quality deteriorated at 240 d. These results indicate that the effect of straw incorporation and decomposition on preferential flow was initially inhibited and subsequently promoted. Soil properties and irrigation quality were initially improved and subsequently deteriorated. The study serves as a reference for rational utilization of agricultural residuals and scientific irrigation, suggesting that the optimal method of straw incorporation should be adopted based on the growth cycle of the crops. |
| first_indexed | 2024-03-07T22:46:27Z |
| format | Article |
| id | doaj.art-407867abe0c5453fbbb2b52821137c1e |
| institution | Directory Open Access Journal |
| issn | 2077-0472 |
| language | English |
| last_indexed | 2024-03-07T22:46:27Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agriculture |
| spelling | doaj.art-407867abe0c5453fbbb2b52821137c1e2024-02-23T15:03:35ZengMDPI AGAgriculture2077-04722024-01-0114220110.3390/agriculture14020201Effects of Straw Incorporation and Decomposition on Soil Preferential Flow Patterns Using the Dye-Tracer MethodZhengyu Duan0Ce Wang1Chengli Zhu2Xiaoan Chen3Yaming Zhai4Liang Ma5Nan Sun6Jiahao Cai7Yu Fu8College of Agricultural Science and Engineering, Hohai University, Nanjing 210098, ChinaCollege of Agricultural Science and Engineering, Hohai University, Nanjing 210098, ChinaCollege of Agricultural Science and Engineering, Hohai University, Nanjing 210098, ChinaJiangxi Academy of Water Science and Engineering, Nanchang 330029, ChinaCollege of Agricultural Science and Engineering, Hohai University, Nanjing 210098, ChinaCollege of Agricultural Science and Engineering, Hohai University, Nanjing 210098, ChinaCollege of Agricultural Science and Engineering, Hohai University, Nanjing 210098, ChinaCollege of Agricultural Science and Engineering, Hohai University, Nanjing 210098, ChinaCollege of Agricultural Science and Engineering, Hohai University, Nanjing 210098, ChinaPreferential pathways in soil lead to nutrient leaching and groundwater contamination. However, the evolution of preferential flow with straw application remains uncertain. This study aims to experimentally determine the hypothesis that, depending on how it is applied, straw will either promote or inhibit the movement of soil preferential flow. Treatments with straw application rates of 0, 5, 10, and 15 t/ha and decomposition time points of 0, 60, and 240 d were set up for the potassium iodide–starch dye-tracer method. The results showed that the straw decomposition rate slowed down in the later stages. At 0 d, the preferential flow coefficients of straw application of 0, 5, 10, and 15 t/ha were 0.13, 0.14, 0.23, and 0.17, respectively. At 60 d, the preferential flow coefficients were approximately 0.17, 0.11, 0.22, and 0.12. Soil properties and irrigation quality improved at 0 d and 60 d. However, a marked increase of 0.31, 0.35, and 0.17 in the preferential flow coefficient was observed at 240 d. Soil properties and irrigation quality deteriorated at 240 d. These results indicate that the effect of straw incorporation and decomposition on preferential flow was initially inhibited and subsequently promoted. Soil properties and irrigation quality were initially improved and subsequently deteriorated. The study serves as a reference for rational utilization of agricultural residuals and scientific irrigation, suggesting that the optimal method of straw incorporation should be adopted based on the growth cycle of the crops.https://www.mdpi.com/2077-0472/14/2/201straw incorporationdecomposition processmacropore flowmoisture contentmoisture retention capacityfield capacity |
| spellingShingle | Zhengyu Duan Ce Wang Chengli Zhu Xiaoan Chen Yaming Zhai Liang Ma Nan Sun Jiahao Cai Yu Fu Effects of Straw Incorporation and Decomposition on Soil Preferential Flow Patterns Using the Dye-Tracer Method Agriculture straw incorporation decomposition process macropore flow moisture content moisture retention capacity field capacity |
| title | Effects of Straw Incorporation and Decomposition on Soil Preferential Flow Patterns Using the Dye-Tracer Method |
| title_full | Effects of Straw Incorporation and Decomposition on Soil Preferential Flow Patterns Using the Dye-Tracer Method |
| title_fullStr | Effects of Straw Incorporation and Decomposition on Soil Preferential Flow Patterns Using the Dye-Tracer Method |
| title_full_unstemmed | Effects of Straw Incorporation and Decomposition on Soil Preferential Flow Patterns Using the Dye-Tracer Method |
| title_short | Effects of Straw Incorporation and Decomposition on Soil Preferential Flow Patterns Using the Dye-Tracer Method |
| title_sort | effects of straw incorporation and decomposition on soil preferential flow patterns using the dye tracer method |
| topic | straw incorporation decomposition process macropore flow moisture content moisture retention capacity field capacity |
| url | https://www.mdpi.com/2077-0472/14/2/201 |
| work_keys_str_mv | AT zhengyuduan effectsofstrawincorporationanddecompositiononsoilpreferentialflowpatternsusingthedyetracermethod AT cewang effectsofstrawincorporationanddecompositiononsoilpreferentialflowpatternsusingthedyetracermethod AT chenglizhu effectsofstrawincorporationanddecompositiononsoilpreferentialflowpatternsusingthedyetracermethod AT xiaoanchen effectsofstrawincorporationanddecompositiononsoilpreferentialflowpatternsusingthedyetracermethod AT yamingzhai effectsofstrawincorporationanddecompositiononsoilpreferentialflowpatternsusingthedyetracermethod AT liangma effectsofstrawincorporationanddecompositiononsoilpreferentialflowpatternsusingthedyetracermethod AT nansun effectsofstrawincorporationanddecompositiononsoilpreferentialflowpatternsusingthedyetracermethod AT jiahaocai effectsofstrawincorporationanddecompositiononsoilpreferentialflowpatternsusingthedyetracermethod AT yufu effectsofstrawincorporationanddecompositiononsoilpreferentialflowpatternsusingthedyetracermethod |