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| Effects of slow-release fertilizer reduction and layered application on the greenhouse gas emission characteristics of peanut fields |
| Received:March 11, 2024 |
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| KeyWord:peanut;slow-release fertilizer;layered fertilization;greenhouse gas emission;global warming potential |
| Author Name | Affiliation | E-mail | | CAO Yidan | College of Agronomy, Qingdao Agricultural University/Shandong Provincial Key Laboratory of Dryland Farming Technology/Shandong Provincial Collaborative Innovation Center of Peanut Production, Qingdao 266109, China | | | QIAN Linjun | College of Agronomy, Qingdao Agricultural University/Shandong Provincial Key Laboratory of Dryland Farming Technology/Shandong Provincial Collaborative Innovation Center of Peanut Production, Qingdao 266109, China | | | SUN Yüjie | College of Agronomy, Qingdao Agricultural University/Shandong Provincial Key Laboratory of Dryland Farming Technology/Shandong Provincial Collaborative Innovation Center of Peanut Production, Qingdao 266109, China | | | YANG Lijian | College of Agronomy, Qingdao Agricultural University/Shandong Provincial Key Laboratory of Dryland Farming Technology/Shandong Provincial Collaborative Innovation Center of Peanut Production, Qingdao 266109, China | | | SI Tong | College of Agronomy, Qingdao Agricultural University/Shandong Provincial Key Laboratory of Dryland Farming Technology/Shandong Provincial Collaborative Innovation Center of Peanut Production, Qingdao 266109, China | | | ZOU Xiaoxia | College of Agronomy, Qingdao Agricultural University/Shandong Provincial Key Laboratory of Dryland Farming Technology/Shandong Provincial Collaborative Innovation Center of Peanut Production, Qingdao 266109, China | xxzou@qau.edu.cn |
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| Abstract: |
| Exploring the effects of slow-release fertilizer reduction and layered application on greenhouse gas（GHG）emissions in peanut fields can promote green and low-carbon agricultural production. In this study, conventional fertilization was used as the control（CK）, and compound fertilizer（CF）and slow-release fertilizer（RF）were selected for layered fertilization, with 10% and 20% nitrogen reduction compared with CK. A total of four treatments were combined：CF10%, CF20%, RF10%, and RF20%. The emission fluxes of N2O, CH4, and CO2 during peanut growth period were monitored by static chamber-gas chromatograph techniques and the global warming potential effects （GWP）were calculated. The results showed that the emission fluxes of GHGs under each treatment showed similar fluctuations, and that the plant-soil systems constituted N2O emission sources and CO2 and CH4 absorption sinks during the growth period of the peanut. Compared with CK, the N2O emissions of each treatment were significantly reduced by 11.29%-27.06%, and the N2O emissions of RF10% compared with CF10% and RF20% compared with CF20% were reduced by 13.30% and 13.87%, respectively. The CH4 absorption of each layered fertilization treatment was significantly higher than that of CK, among which RF10% and RF20% were increased by 19.02% and 16.87%, respectively, and the CH4 absorption of the RF10% treatment was significantly higher than that of CF10%（11.28%）. The cumulative CO2 absorption of the RF10% treatment was significantly higher than that of CK（11.35%）, but no significant difference was found compared with RF20%. The fertilizer type had a significant and extremely significant effect on the average emission rate of N2O and CH4, respectively, while the fertilizer application amount only had a significant effect on the average N2O emission rate. Soil temperature had a good correlation with GHGs fluxes, whereas soil moisture had a significant effect only on the emission fluxes of CH 4. Compared with CK, the GWPs of CF10%, CF20%, RF10%, and RF20% treatments were significantly decreased by 13.37%, 18.48%, 27.90%, and 32.09%, respectively. In conclusion, layered fertilization is beneficial by reducing GHGs emissions in peanut fields, and with slow-release fertilizer, layered fertilization with 10% and 20% fertilizer reductions had better effects that are properly applicable in agricultural production. |
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