ACTA AGRICULTURAE BOREALI-SINICA ›› 2020, Vol. 35 ›› Issue (5): 185-194. doi: 10.7668/hbnxb.20190813

Special Issue: Wheat

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

Effect of Intercropping on Yield Advantage Formation of Wheat under Different Nitrogen Levels

LIU Zhenyang1, BAI Wenlian1, HUANG Shaoxin1, WU Xinyu1, QIN Xiaomin1, TANG Li1, ZHENG Yi1,2, XIAO Jingxiu1   

  1. 1. College of Resources and Environmental Science, Yunnan Agricultural University, Kunming 650201, China;
    2. Education Department of Yunnan, Kunming 650223, China
  • Received:2020-07-11 Published:2020-10-28

Abstract: Two years field trials were conducted to study the effects of wheat and faba bean intercropping on wheat yield and dry matter accumulation under different nitrogen(N)levels the application rate for N0, N1, N2, and N3 was 0, 90, 180 and 270 kg/ha, respectively. Logistic model was used to simulate the key growth parameters including the maximum biomass (A), initial growth rate(r), the maximum growth rate(Rmax),time to reach the maximum growth rate (Tmax)and growth dynamics for inter-and mono-cropped wheat. The results showed that the yield advantage of wheat and faba bean intercropping was significant, LER>1 (except for N3).Both wheat yield and key growth parameters were affected by intercropping and N application rates. Except for N3 level,compared with monocropped wheat(MW),wheat and faba bean intercropping averagely increased the yield, Rmax and r of the first row of intercropping wheat (IW1) (next to faba bean in a intercropping pattern) by 29.5%, 24.4%(except for N0 level in 2017) and 16.1%(except for N0 level in 2017), respectively. Under N1 and N2 levels, the A of IW1 was averagely increased by 7.9% as compared to MW. The growth rate of IW1 was also improved when wheat intercropped with faba bean relative to corresponding MW during wheat attained its growth peak and resulted in stimulated biomass accumulation during reproductive growth stages(90-180 days after sowing). The yield of the second row of intercropping wheat (IW2) (slightly far away from faba bean in a intercropping pattern) was increased by 19.7% (except 2018 N2) when compared to MW under N1 to N2 levels. Under N1 and N2 levels, both the A and Rmax for IW2 were averagely increased by 7.8% and 10.6% (except 2018 N2) relative to MW, respectively. In conclusion, the formation of wheat and faba bean intercropping yield advantages originated from the border row advantage and the positive effect of inner-row. The key growth parameters of A,Rmax and r played an important role in intercropping yield advantages. However, the intercropping advantage decreased or even disappeared with the increased N rates. It is imperative for rational intercropping and rational application of N fertilizer in intercropping system.

Key words: Wheat and faba bean, Intercropping, Yield, Key growth parameter, Growth rate, Border-inner-row effects

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Cite this article

LIU Zhenyang, BAI Wenlian, HUANG Shaoxin, WU Xinyu, QIN Xiaomin, TANG Li, ZHENG Yi, XIAO Jingxiu. Effect of Intercropping on Yield Advantage Formation of Wheat under Different Nitrogen Levels[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2020, 35(5): 185-194. doi: 10.7668/hbnxb.20190813.

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