|
| Effect and mechanism analysis of different fertilization methods on nitrogen and phosphorus loss in paddy field |
| Received:May 14, 2024 |
| View Full Text View/Add Comment Download reader |
| KeyWord:straw returning;slow-release fertilizer;water-soluble fertilizer;rice yield;nitrogen and phosphorus loss;soil fertility |
| Author Name | Affiliation | E-mail | | LUO Mei | College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China
School of Life and Food Engineering, Fuyang Normal University, Fuyang 236037, China | | | LI Jing | College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China | | | GAO Tingfeng | College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China | | | Nebiyou Legesse | College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China | | | LIU Ying | College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China | | | ZHANG Kexin | College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China | | | LAI Xijun | Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China | | | MA Youhua | College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China | | | HU Hongxiang | College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China | huhongxiang@ahau.edu.cn |
|
| Hits: 1035 |
| Download times: 881 |
| Abstract: |
| To investigate the effects of straw returning, slow-release fertilizer and water-soluble fertilizer combined with chemical fertilizer on nitrogen and phosphorus loss and and mechanism in runoff water from paddy fields, we carried out a field plot experiment and set up five treatments（blank control, CK; recommended fertilization, OF; straw returning combined with chemical fertilizer, SF; slow-release fertilizer combined with chemical fertilizer, SRF; and water-soluble fertilizer combined with chemical fertilizer, WSF）to study runoff loss of nitrogen and phosphorus, rice yield, and soil fertility in 2022—2023. The results showed that both SRF and WSF treatments decreased runoff loss of nitrogen and phosphorus compared with the OF treatment, the annual average TN loss decreased by 43.73% and 45.10%, and the TP loss decreased by 57.34% and 62.36%, respectively. However, in 2022, TN and TP loss increased by 11.64% and 25.00%, respectively, under SF treatment. Compared with the OF treatment, SF, SRF and WSF treatments increased rice yield by 1.78%, 2.67% and 1.45%, respectively. All fertilization treatments had an effect on soil fertility index of paddy fields, and the SRF treatment had the best effect on soil fertility index. Correlation analysis showed that TN loss and TP loss in paddy runoff were positively correlated with volume of runoff, nitrogen and phosphorus concentration, soil nitrate nitrogen, ammonium nitrogen content, phosphatase and urease activities, but negatively correlated with nitrogen and phosphorus concentration ratio, soil pH, total nitrogen, total phosphorus, and microbial biomass carbon and microbial biomass phosphorus content. Consequently, slow-release fertilizer or water-soluble fertilizer combined with chemical fertilizer all can improve rice yield and reduce nitrogen and phosphorus runoff loss, which are the effective agronomic measures to promote sustainable agricultural production and reduce non-point source pollution from the paddy fields in the Chaohu Lake area. |
|
|
|
