Retarding effect of migration of colloidal phosphorus in three types of soil
Loss of phosphorus in farmland is an important cause of eutrophication in water environment, and colloids are an important form of phosphorus transported from soils to rivers and other water bodies. Therefore, it is very important to control the loss of colloidal phosphorus in soil. In this study, a...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Zhejiang University Press
2019-04-01
|
| Series: | 浙江大学学报. 农业与生命科学版 |
| Subjects: | |
| Online Access: | https://www.academax.com/doi/10.3785/j.issn.1008-9209.2018.03.262 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Loss of phosphorus in farmland is an important cause of eutrophication in water environment, and colloids are an important form of phosphorus transported from soils to rivers and other water bodies. Therefore, it is very important to control the loss of colloidal phosphorus in soil. In this study, a dynamic soil column method was used to determine the retardation coefficient of colloidal phosphorus migration in paddy soil, vegetable soil and tea soil, and the control effect of colloidal phosphorus migration was studied by applying different levels (0%, 0.05% and 0.1%) of polyacrylamide (PAM). The results showed that in the control group without PAM, vegetable soil with the highest sand content had the lowest retarding effect against colloidal phosphorus migration, and the retardation coefficient (R<sub>d</sub>) was 6.397; and the control effect of paddy soil with the smallest sand content against colloidal phosphorus migration was optimal (R<sub>d</sub>=9.915). Compared with the control group, after applying 0.05% and 0.1% PAM in the three tested soils (vegetable soil, tea soil, paddy soil), the retardation coefficient of soil colloidal phosphorus increased by 58.3%, 46.8%, 26.5% and 87.7%, 67.1%, 60.4%, respectively, indicating that the application of PAM can significantly increase the control effect of soil against colloidal phosphorus migration and reduce the risk of colloidal phosphorus loss. |
|---|---|
| ISSN: | 1008-9209 2097-5155 |