|
| Effects of returning paddy field to wetland on the soil ecological stoichiometric characteristics in the Yellow River Delta |
| Received:April 26, 2024 |
| View Full Text View/Add Comment Download reader |
| KeyWord:carbon;nitrogen;phosphorus;ecological stoichiometric characteristics;returning to wetland;paddy field;the Yellow River Delta |
| Author Name | Affiliation | E-mail | | WANG Qixuan | Institute for Advanced Study in Coastal Ecology, Ludong University, Yantai 264025, China | | | YANG Jisong | Institute for Advanced Study in Coastal Ecology, Ludong University, Yantai 264025, China
Dongying Academy of Agricultural Sciences, Dongying 257091, China | yagjisong@ldu.edu.cn | | LU Guowei | Institute for Advanced Study in Coastal Ecology, Ludong University, Yantai 264025, China | | | SUN Dandan | Institute for Advanced Study in Coastal Ecology, Ludong University, Yantai 264025, China | | | WANG Zhikang | Institute for Advanced Study in Coastal Ecology, Ludong University, Yantai 264025, China | | | ZHOU Di | Institute for Advanced Study in Coastal Ecology, Ludong University, Yantai 264025, China | | | SHAO Qiuling | Dongying Academy of Agricultural Sciences, Dongying 257091, China | |
|
| Hits: 197 |
| Download times: 274 |
| Abstract: |
| In order to explore the effects of returning paddy field on ecological stoichiometric characteristics of soil carbon（C）, nitrogen（N） and phosphorus（P）, returned paddy fields for 2 years（TG2a）and for 15 years（TG15a）were selected in the Yellow River Delta, and the paddy field（DT）and natural wetland（ZR）were selected as the controls, to study the ecological stoichiometric characteristics of soil carbon, nitrogen and phosphorus in paddy field, and also to reveal the key impacting factors. The results showed that the mean values of total organic carbon（TOC）, total nitrogen（TN）and total phosphorus（TP）contents of different soils were 1.30-3.86, 0.30-1.03 g·kg-1, and 0.39-0.72 g·kg-1, respectively. A decreased was found for the contents of TOC, TN and TP in the TG2a soil compared to DT, while an increase was found in the TG15a soil compared to TG2a. The mean ratios of C∶N, C∶P and N∶P in soils were 4.31-5.81, 8.23-17.56 and 1.56-4.10, and values of C∶N varied with soil layers and those of C∶P and N∶P increased overall in the returned paddy field. The study indicated that the contents of dissolved organic carbon and clay were the main factors affecting the changes in TOC, TN, TP and their ecological stoichiometric characteristics in soils as a response to returning paddy field to wetland. |
|
|
|
