Water and salt movement in different soil textures under various negative irrigating pressures
This study examined the effect of different negative pressures and soil textures on water and salt movement to improve the efficiency of negative pressure irrigation (NPI). Four soil textures of varying fineness (Loamy Sand, Loam, Silty Loam, and Sandy Loam) and three negative pressure values (0, –5...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2016-08-01
|
| Series: | Journal of Integrative Agriculture |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095311915612096 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1839599762368626688 |
|---|---|
| author | Jia-jia WANG Yuan-fang HUANG Huai-yu LONG |
| author_facet | Jia-jia WANG Yuan-fang HUANG Huai-yu LONG |
| author_sort | Jia-jia WANG |
| collection | DOAJ |
| description | This study examined the effect of different negative pressures and soil textures on water and salt movement to improve the efficiency of negative pressure irrigation (NPI). Four soil textures of varying fineness (Loamy Sand, Loam, Silty Loam, and Sandy Loam) and three negative pressure values (0, –5, and –10 kPa) were used. As irrigation time increased, wetting front movement speeds decreased, and as negative pressure increased, wetting front size decreased. Coarse soils had the smallest wetting front under greater negative pressure. Next, water infiltration rate decreased as irrigation time increased, and coarse soils had the lowest average infiltration rate under greater negative pressure. Finally, salt content increased with distance from the irrigation emitter and with increased negative pressure. Further, coarse soils were found to have decreased desalination under greater negative pressure. Thus, soil texture has a strong effect on NPI efficiency. However, by adjusting pressure values in accordance with soil texture, soil water content can be controlled and maintained. These findings are important to the improvement of NPI systems, increasing their practicality for agricultural use. |
| format | Article |
| id | doaj-art-977d5540b83a4231917b5805e4043f3f |
| institution | Matheson Library |
| issn | 2095-3119 |
| language | English |
| publishDate | 2016-08-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Integrative Agriculture |
| spelling | doaj-art-977d5540b83a4231917b5805e4043f3f2025-08-02T14:30:52ZengKeAi Communications Co., Ltd.Journal of Integrative Agriculture2095-31192016-08-0115818741882Water and salt movement in different soil textures under various negative irrigating pressuresJia-jia WANG0Yuan-fang HUANG1Huai-yu LONG2Department of Soil and Water Sciences, College of Resources and Environmental Sciences, China Agricultural University/Key Laboratory of Arable Land Conservation (North China), Minstry of Agriculture/Key Laboratory of Agricultural Land Quality Monitoring, Ministry of Land and Resources, Beijing 100093, P.R. China; Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China; WANG Jia-jiaDepartment of Soil and Water Sciences, College of Resources and Environmental Sciences, China Agricultural University/Key Laboratory of Arable Land Conservation (North China), Minstry of Agriculture/Key Laboratory of Agricultural Land Quality Monitoring, Ministry of Land and Resources, Beijing 100093, P.R. ChinaInstitute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China; Correspondence LONG Huai-yu, Tel: +86-10-82108776This study examined the effect of different negative pressures and soil textures on water and salt movement to improve the efficiency of negative pressure irrigation (NPI). Four soil textures of varying fineness (Loamy Sand, Loam, Silty Loam, and Sandy Loam) and three negative pressure values (0, –5, and –10 kPa) were used. As irrigation time increased, wetting front movement speeds decreased, and as negative pressure increased, wetting front size decreased. Coarse soils had the smallest wetting front under greater negative pressure. Next, water infiltration rate decreased as irrigation time increased, and coarse soils had the lowest average infiltration rate under greater negative pressure. Finally, salt content increased with distance from the irrigation emitter and with increased negative pressure. Further, coarse soils were found to have decreased desalination under greater negative pressure. Thus, soil texture has a strong effect on NPI efficiency. However, by adjusting pressure values in accordance with soil texture, soil water content can be controlled and maintained. These findings are important to the improvement of NPI systems, increasing their practicality for agricultural use.http://www.sciencedirect.com/science/article/pii/S2095311915612096negative pressure irrigationvolumetric water contentsoil salt contentsoil texture |
| spellingShingle | Jia-jia WANG Yuan-fang HUANG Huai-yu LONG Water and salt movement in different soil textures under various negative irrigating pressures Journal of Integrative Agriculture negative pressure irrigation volumetric water content soil salt content soil texture |
| title | Water and salt movement in different soil textures under various negative irrigating pressures |
| title_full | Water and salt movement in different soil textures under various negative irrigating pressures |
| title_fullStr | Water and salt movement in different soil textures under various negative irrigating pressures |
| title_full_unstemmed | Water and salt movement in different soil textures under various negative irrigating pressures |
| title_short | Water and salt movement in different soil textures under various negative irrigating pressures |
| title_sort | water and salt movement in different soil textures under various negative irrigating pressures |
| topic | negative pressure irrigation volumetric water content soil salt content soil texture |
| url | http://www.sciencedirect.com/science/article/pii/S2095311915612096 |
| work_keys_str_mv | AT jiajiawang waterandsaltmovementindifferentsoiltexturesundervariousnegativeirrigatingpressures AT yuanfanghuang waterandsaltmovementindifferentsoiltexturesundervariousnegativeirrigatingpressures AT huaiyulong waterandsaltmovementindifferentsoiltexturesundervariousnegativeirrigatingpressures |