ACTA AGRICULTURAE BOREALI-SINICA ›› 2019, Vol. 34 ›› Issue (S1): 183-189. doi: 10.7668/hbnxb.201751565

Special Issue: Corn

• Resource and Environment·Plant Protection • Previous Articles     Next Articles

Biological Nitrogen Fixation of Vetch and the Availability of Vetch Incorporation N to Maize as Successive Crop

WU Yongcheng1, LI Mengying1, YANG Yunfei1, LIU Shishan1, ZENG Xiangzhong3   

  1. 1. College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China;
    2. Key Laboratory of Crop Eco-physiology and Farming System in Southwest China, Chengdu 611130, China;
    3. Soil and Fertilizer Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610000, China
  • Received:2019-08-16 Published:2019-12-28

Abstract: In order to determine the capacity of biological nitrogen fixation of vetch and the recovery rate of N after vetch returning back to field in maize growth season, one field trial and two pot experiments were conducted in Sichuan Province in China. Two methods, 15N isotope dilution (ID) and 15N natural abundance (NA), were employed to determine the efficiency of biological nitrogen fixation (BNF) and the amounts of BNF by vetch cultivated with different N fertilizer application rates (N0, N75, N150, N225) under field conditions. In pot experiments, the biomass production, N fertilizer use efficiency of maize, and 15N recovery rate after soil incorporation with different amounts of vetch were determined.N fertilizer application rates (0, 75, 150, 225 kg/ha) did not significantly influence biomass(5 233.71-6 659.86 kg/ha), nitrogen yield (218.61-278.58 kg/ha)and amounts of BNF (156.81-189.66 kg/ha)of vetch. However, N fertilizer application rates did significantly change the efficiency of BNF (56.35%-85.63%). There was no significant difference in BNF efficiency estimated with ID or NA methods, when same N fertilizer rate (75 or 150 kg/ha) was applied. The 15N amount accumulated by maize shoots (0.51-0.94 mg/pot) and the agronomic use efficiency of N fertilizer (40.13-51.28 g/g) of maize were significantly influenced by the rates of vetch incorporation. However, the rates of vetch incorporation did not significantly change the vetch-derived 15N recovery rate by the spring maize as successive crop.Therefore, the mineral N fertilizer should not be applied to vetch cultivation on soils with a middle level of fertility and the entire aboveground biomass of vetch should be incorporated into the soil for the following spring maize. The study provided a guideline for the N fertilization for the vetch cultivation and its utilization as green manure plant.

Key words: Vetch, Biological nitrogen fixation, 15N isotope method, Maize, Vetch-derived 15N recovery rate

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Cite this article

WU Yongcheng, LI Mengying, YANG Yunfei, LIU Shishan, ZENG Xiangzhong. Biological Nitrogen Fixation of Vetch and the Availability of Vetch Incorporation N to Maize as Successive Crop[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(S1): 183-189. doi: 10.7668/hbnxb.201751565.

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