| Cite this article: | 于滨杭,王丽学,姬建梅,等.基于产量和水氮利用效率的玉米/大豆间作系统炭氮配施方案优选[J].灌溉排水学报,0,():-. |
| yubinhang,wanglixue,jijianmei,et al.基于产量和水氮利用效率的玉米/大豆间作系统炭氮配施方案优选[J].灌溉排水学报,0,():-. |
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| Optimization of combined application scheme of biochar fertilizer in maize / soybean intercropping system based on yield and water and nitrogen use efficiency |
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yubinhang, wanglixue, jijianmei, lisheng, huangqi, changminru
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Shenyang Agricultural University
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| Abstract: |
| In order to achieve low consumption and high yield in the intercropping system and obtain the appropriate combined application scheme of biochar and nitrogen, the field plot experiment was carried out with Intercropping Corn and soybean as test materials. Three biochar application levels: C0 (0 t?hm-2), C1 (15 t?hm-2), C2 (30 t?hm-2) and three nitrogen application levels: N1 (135 kg?hm-2), N2 (180 kg?hm-2), N3 (225 kg?hm-2), and the control treatment CK (no biochar or nitrogen application) was set, The effects of different carbon and nitrogen levels on the yield and water and nitrogen utilization efficiency of maize / soybean intercropping system were studied. TOPSIS method weighted by game theory was used for comprehensive evaluation, and the optimal application scheme based on yield and water and nitrogen utilization efficiency was determined. The results show that carbon, nitrogen and their interaction have significant effects on each index. Among them, carbon application has the greatest influence on corn yield and water and nitrogen use efficiency, and nitrogen application has the greatest influence on soybean yield. The yield and water use efficiency of maize treated with C1N2 were the highest, and the yield of soybean, nitrogen use efficiency, nitrogen partial productivity and nitrogen agronomy efficiency of C1N1 were the highest. By analyzing the carbon-nitrogen regulation model, it was found that the comprehensive evaluation value of the synergistic effect of carbon and nitrogen application increased at first and then decreased with the increase of carbon and nitrogen application rates, and the suitable biochar reduction of nitrogen application had a positive coupling effect on the yield and water and nitrogen utilization efficiency of corn/soybean intercropping system. Therefore, it is recommended that the northeast region with relatively sufficient water and fertilizer should adopt the combined application scheme of carbon application amount of 17.1 ~ 24 t?hm-2 and nitrogen application amount of 154.8 ~ 173.7 kg?hm-2. The research can provide scientific basis for "reducing nitrogen and increasing efficiency" of corn/soybean intercropping system. |
| Key words: maize/soybean intercropping; biochar; reducing nitrogen application; yield; nitrogen use efficiency |
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