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Effects of Maize/Peanut Intercropping on Yield and Nitrogen Uptake and Utilization under Different Nitrogen Application Rates

Author

Listed:
  • Yongyong Zhang

    (College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China
    These authors contributed equally to this work.)

  • Fengyan Zhao

    (Institute of Crop Cultivation and Farming System, Liaoning Academy of Agricultural Sciences, Shenyang 110161, China
    National Agricultural Experimental Station for Agricultural Environment, Fuxin 123102, China
    Key Laboratory of Water-Saving Agriculture of Northeast, Ministry of Agriculture and Rural Affairs, Shenyang 110161, China
    These authors contributed equally to this work.)

  • Zhanxiang Sun

    (Institute of Crop Cultivation and Farming System, Liaoning Academy of Agricultural Sciences, Shenyang 110161, China
    National Agricultural Experimental Station for Agricultural Environment, Fuxin 123102, China
    Key Laboratory of Water-Saving Agriculture of Northeast, Ministry of Agriculture and Rural Affairs, Shenyang 110161, China)

  • Wei Bai

    (Institute of Crop Cultivation and Farming System, Liaoning Academy of Agricultural Sciences, Shenyang 110161, China
    National Agricultural Experimental Station for Agricultural Environment, Fuxin 123102, China
    Key Laboratory of Water-Saving Agriculture of Northeast, Ministry of Agriculture and Rural Affairs, Shenyang 110161, China)

  • Zhe Zhang

    (Institute of Crop Cultivation and Farming System, Liaoning Academy of Agricultural Sciences, Shenyang 110161, China
    National Agricultural Experimental Station for Agricultural Environment, Fuxin 123102, China
    Key Laboratory of Water-Saving Agriculture of Northeast, Ministry of Agriculture and Rural Affairs, Shenyang 110161, China)

  • Chen Feng

    (Institute of Crop Cultivation and Farming System, Liaoning Academy of Agricultural Sciences, Shenyang 110161, China
    National Agricultural Experimental Station for Agricultural Environment, Fuxin 123102, China
    Key Laboratory of Water-Saving Agriculture of Northeast, Ministry of Agriculture and Rural Affairs, Shenyang 110161, China)

  • Qian Cai

    (Institute of Crop Cultivation and Farming System, Liaoning Academy of Agricultural Sciences, Shenyang 110161, China
    National Agricultural Experimental Station for Agricultural Environment, Fuxin 123102, China
    Key Laboratory of Water-Saving Agriculture of Northeast, Ministry of Agriculture and Rural Affairs, Shenyang 110161, China)

Abstract

The effects of maize/peanut intercropping on crop yields, peanut nodulation, biological nitrogen (N) fixation in peanuts, crop N uptake, and N use efficiency under different N application rates were studied. A long-term maize/peanut intercropping micro-plot experiment was started in 2015. The experiment included the following three planting patterns: maize sole crop (SM), peanut sole crop (SP), and maize and peanut intercropping (intercropping maize: IM; intercropping peanut: IP). Additionally, three N application rates were tested as follows: 0 kg·ha −1 (N0), 150 kg·ha −1 (N150), and 300 kg·ha −1 (N300). The results indicated that N fertilization significantly increased maize yield. Intercropping increased maize yield while decreasing peanut yield across different N application rates. Both N fertilization and intercropping significantly increased the maize harvest index (HI), whereas intercropping decreased the peanut HI under N300. The number and fresh weight of peanut nodules decreased with the increasing N application rate with reductions ranging from 31.15% to 45.23% and 39.60% to 46.67%, respectively. Intercropping increased the number of peanut nodules by an average of 62.56% under the N0 treatment. Intercropping significantly improved the N absorption capacity of the whole intercropping system, and the contribution of maize was higher than that of peanuts. Maize demonstrated a stronger competitive ability for N uptake compared with peanuts in the intercropping system. Intercropping significantly increased the N use efficiency for both maize and peanuts. However, the N use efficiency of maize increased with N application rates, while that of peanut decreased. Compared with sole crops, intercropping increased the partial factor productivity of maize by 55.2% but decreased that of peanuts by 56.3%. In conclusion, at an N application rate of 150 kg·ha −1 , maize/peanut intercropping increased overall crop yield and improved the N absorption and use capacity of maize

Suggested Citation

  • Yongyong Zhang & Fengyan Zhao & Zhanxiang Sun & Wei Bai & Zhe Zhang & Chen Feng & Qian Cai, 2024. "Effects of Maize/Peanut Intercropping on Yield and Nitrogen Uptake and Utilization under Different Nitrogen Application Rates," Agriculture, MDPI, vol. 14(6), pages 1-15, June.
    • Handle: RePEc:gam:jagris:v:14:y:2024:i:6:p:893-:d:1409014
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