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CHINESE JOURNAL OF OIL CROP SCIENCES ›› 2021, Vol. 43 ›› Issue (4): 664-.doi: 10.19802/j.issn.1007-9084.2020058

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Effects of exogenous phosphorus on root morphology, chlorophyll contentand yield of peanut under different zinc application methods

  

  1. 1. Institute of Plant Nutrient, Resources and Environment, Henan Academy of Agricultural Sciences, Zhengzhou,450002, China;  2. Zhengyang Institute of Peanut, Zhengyang, 463600, China
  • Online:2021-08-28 Published:2021-08-31

Abstract:

In order to clarify the suitable phosphorus-zinc combination application mode and its possible mechanism for peanut high yield and efficiency, the field experiments was conducted to study the effects of exogenous phosphorus rates on root morphology, chlorophyll content and yield of peanut under different zinc application methods. The results showed that the phosphorus application promoted the roots and shoots growth of peanut, improved the SPAD values, and increased the yield and its components. Peanut yields under P45, P90, P135, and P180 treatments averagely increased by 36.8%, 60.7%, 48.3% and 39.2% compared with non-phosphorus (P0), respectively. The zinc application method had no significant effect on root morphological characteristics and aboveground vegetative growth of peanut, but had significant effects on the number of fruit filled per plant, fruit weight per plant, and chlorophyll content of leaves. The yield averagely increased by 6.4% and 10.1% under foliar (Znf) and soil applied Zn fertilizers (Zns), respectively, suggesting having higher yield under soil zinc application. It was observed that the root and shoot growth, yield and its components of peanut was not significantly affected by the interaction between phosphorus fertilizer and Zn application methods, the study parameters were the highest under ZnsP90 treatment. In summary, in lime concretion black soil area of peanut production, soil applied 90 kg P2O5/hm2 combined with 30 kg ZnSO4·7H2O /hm2 improved the root morphological characteristics and photosynthetic characteristics of peanut, which was a suitable phosphorus and zinc fertilizer application method for peanut growth and high yield.

Key words: zinc application method, phosphorus, peanut, root morphology, photosynthetic characteristics

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