|
| Effects of layered fertilization on nitrogen loss，absorption and utilization in peanut fields |
| Received:May 28, 2024 |
| View Full Text View/Add Comment Download reader |
| KeyWord:layered fertilization;ammonia volatilization;distribution of nitrogen in soil profile;peanut yield;fertilizer use efficiency |
| Author Name | Affiliation | E-mail | | QIAN Linjun | Qingdao Agricultural University, Shandong Province Key Laboratory of Rainfed Agriculture Technology/Shandong Peanut Industry Collaborative Innovation Center, Qingdao 266109, China | | | CAO Yidan | Qingdao Agricultural University, Shandong Province Key Laboratory of Rainfed Agriculture Technology/Shandong Peanut Industry Collaborative Innovation Center, Qingdao 266109, China | | | ZHANG Caijun | Qingdao Hexie Biotechnology Co., Ltd., Qingdao 266200, China | | | SI Tong | Qingdao Agricultural University, Shandong Province Key Laboratory of Rainfed Agriculture Technology/Shandong Peanut Industry Collaborative Innovation Center, Qingdao 266109, China | | | YU Xiaona | Qingdao Agricultural University, Shandong Province Key Laboratory of Rainfed Agriculture Technology/Shandong Peanut Industry Collaborative Innovation Center, Qingdao 266109, China | | | ZHANG Xiaojun | Qingdao Agricultural University, Shandong Province Key Laboratory of Rainfed Agriculture Technology/Shandong Peanut Industry Collaborative Innovation Center, Qingdao 266109, China | | | ZOU Xiaoxia | Qingdao Agricultural University, Shandong Province Key Laboratory of Rainfed Agriculture Technology/Shandong Peanut Industry Collaborative Innovation Center, Qingdao 266109, China | xxzou@qau.edu.cn |
|
| Hits: 1026 |
| Download times: 704 |
| Abstract: |
| To explore the nitrogen loss, absorption and utilization in peanut fields under different layered fertilization（LF）, a field experiment was conducted at the Laiyang Experimental Station of Qingdao Agricultural University in 2019—2020. The peanut variety ‘Qinghua 7’was used as the test material, and conventional broadcast fertilization（CBF）was used as the control. The effects of double-layered fertilization（DLF）and triple-layered fertilization（TLF）with no fertilizer reduction, 10%, and 20% reduction of fertilizer on ammonia volatilization, distribution of nitrogen in soil profile, plant nitrogen accumulation, and nitrogen fertilizer utilization efficiency were studied. This study found that there was no significant difference in the cumulative ammonia volatilization between DLF and TLF with the same fertilizer amount, but, LF with zero, 10%, and 20% reduction was decreased by 15.21%, 20.66%, and 23.62% on average compared with CBF, respectively. Nitrogen loss occurred mainly in the form of nitrate nitrogen under all treatments. The risk of nitrogen leaching was higher under LF than CBF, and the nitrogen leaching of DLF was higher than that of TLF under the same fertilization amount. LF significantly increased the nitrogen accumulation in peanut plants, and the most significant effects was observed under the zero fertilizer reduction treatments. Compared to conventional rotary tillage fertilization, zero fertilizer reduction treatments enhanced nitrogen accumulation by 23.57%-29.95% in 2019 and 34.59%-35.40% in 2020. LF significantly increases peanut yield, and the peanut yield under DLF with zero and 10% reduction and TLF with zero reduction was increased by 20.12%, 18.34%, and 23.08% in 2019, and by 26.23%, 22.07%, and 25.00% in 2020, compared with CBF. However, there was no significant difference between DLF and TLF with the same fertilization amount. Fertilizer partial productivity, agronomic efficiency, fertilizer contribution rate and nitrogen use efficiency under LF were higher than those under CBF, and increased by 20.07%-42.73%, 79.27%-104.92%, 8.23-14.59 percentage point and 5.53- 18.16 percentage point in 2019, respectively, and by 25.00%-35.66%, 52.08%-114.58%, 3.69-15.85 percentage points and 3.73-17.67 percentage points in 2020, respectively. In conclusion, LF plays a significant role in alleviating ammonia volatilization and increasing peanut yield, but there is a certain risk of leaching. And the depth of fertilization at the bottom layer should be appropriately adjusted. Considering the energy consumption cost of agricultural machinery, it is recommended to use the DLF with zero and 10% fertilizer reduction in production. |
|
|
|
