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

文献类型： 外文期刊

第一作者： Zhang, Yongyong

作者： Zhang, Yongyong;Zhao, Fengyan;Sun, Zhanxiang;Bai, Wei;Zhang, Zhe;Feng, Chen;Cai, Qian;Zhao, Fengyan;Sun, Zhanxiang;Bai, Wei;Zhang, Zhe;Feng, Chen;Cai, Qian;Zhao, Fengyan;Sun, Zhanxiang;Bai, Wei;Zhang, Zhe;Feng, Chen;Cai, Qian

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关键词： intercropping; nitrogen fertilizer; yield; nodule; nitrogen use efficiency

期刊名称：AGRICULTURE-BASEL （ 影响因子：3.3； 五年影响因子：3.5 ）

ISSN：

年卷期： 2024 年 14 卷 6 期

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收录情况： SCI

摘要： 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 kgha-1 (N0), 150 kgha-1 (N150), and 300 kgha-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 kgha-1, maize/peanut intercropping increased overall crop yield and improved the N absorption and use capacity of maize

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