|
| Improvements of soil in lakeside zones using combined crop straw and PAM |
| Received:November 15, 2015 |
| View Full Text View/Add Comment Download reader |
| KeyWord:straw;polyacrylamide(PAM);lakeside zones;soil aggregates;soil structure;repair process |
| Author Name | Affiliation | E-mail | | CHEN Fang-xin | Engineering and Technology Centre of Lake, State Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu(SEPSORSLD), Research Centre of Lake Environment, State Environmental Protection Key Laboratory for Lake Pollution Control, State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
China University of Geosciences, Institute of water resources and the environment, Beijing 100083, China | | | LU Shao-yong | Engineering and Technology Centre of Lake, State Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu(SEPSORSLD), Research Centre of Lake Environment, State Environmental Protection Key Laboratory for Lake Pollution Control, State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China | lushy2000@163.com | | FENG Chuan-ping | China University of Geosciences, Institute of water resources and the environment, Beijing 100083, China | |
|
| Hits: 2583 |
| Download times: 2379 |
| Abstract: |
| An indoor experiment was conducted to examine the improvements of soil in lakeside zone using combined crop straw and polyacrylamide(PAM). Soil nutrients and soil aggregate stability and their correlation under different ratios of straw and PAM were investigated. Applying combined straw and PAM not only increased soil nutrients, promoting plant growth, but also improved soil structure, controlling soil erosion. The best combination was 3 g·kg-1 straw-1 g·kg-1 PAM, which increased the content of large aggregates, organic matter, available N, and available P by 42.81%, 42.70%, 189.60%, 31.80% and 50.32%, respectively. Organic matter and large aggregates were the factors determining the stability of lakeside zone soil. The organic matter provided by straw transformed into humus, which helped form medium-aggregates by bonding micro-aggregates together. Visible PAM polymerized medium-aggregates(<2 mm) into >2 mm macro-aggregates by bridge and adsorption. The soil porosity and water-holding capacity were thus improved. The findings would shed light on utilization of agricultural residues in the ecological restoration. |
|
|
|
