Journal of Northern Agriculture ›› 2025, Vol. 53 ›› Issue (1): 64-72.doi: 10.12190/j.issn.2096-1197.2025.01.08

• Soil and fertilizer·Physiology and biochemistry • Previous Articles     Next Articles

Effects of biological microbial agents on photosynthetic characteristics and yield of maize at filling stage

ZHANG Yidi1, YE Jun1,2, DUAN Sitong1, ZHANG Xiangqian1,2, ZHAO Zihao1, XIAO Sa1, WANG Weini3, LI Juan1, XING Jun4, WANG Hongwei5, ZHANG Dejian1   

  1. 1. College of Life Sciences,Inner Mongolia University,Hohhot 010021,China;
    2. Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China;
    3. Center for Agricultural and Animal Husbandry Ecology and Resource Conservation of Ordos City,Ordos 017010,China;
    4. Dalad Banner Agricultural and Animal Husbandry Bureau,Dalad Banner 014300,China;
    5. Zalantun City Rural Operations Service Center,Zalantun 162650,China
  • Received:2024-11-05 Online:2025-02-20 Published:2025-06-26

Abstract: 【Objective】To clarify the effects of different biological microbial agents on the photosynthetic characteristics and yield of maize during the filling stage under straw returning conditions along the southern bank of the Yellow River irrigation area.【Methods】Using the maize variety Lihe No. 1 as the test material,four treatments were set up:Bacillus+Acetobacter(A),Bacillus+fermenting fungi+Actinomycetes(B),Bacillus subtilis+lichen(C),and a control group without microbial agents(CK). The study analyzed the effects of different biological microbial agents on the light response curve and diurnal variation in photosynthetic characteristics of maize ear leaves during the filling stage and maize yield.【Results】The diurnal variations in net photosynthetic rate(Pn) and stomatal conductance(Gs) of plants in all treatments exhibited a bimodal curve trend,with both Pn and Gs peaking at the same times(10:00 and 14:00). The transpiration rate(Tr) reached its peaks at 10:00 and 13:00,with some differences in peak magnitudes among treatments. The diurnal variation in intercellular CO2 concentration(Ci) in maize ear leaves followed a “V”-shaped pattern. The fitted light response curves for all treatments reached significant levels,with Treatment B showing the highest simulated maximum net photosynthetic rate(Pnmax) at 32.90 μmol/(m2·s),which was 12.29%,6.44%,and 18.01% higher than those of CK,Treatment A,and Treatment C,respectively. Moreover,Treatment B resulted in the highest yield(14 299.59 kg/hm2),surpassing the other treatments by 2.00%-9.01%.【Conclusion】Bacillus+fermenting fungi+Actinomycetes with straw returning can effectively enhance soil nutrients and increase maize yield,and is more suitable for farmland application along the southern bank of the Yellow River irrigation area.

Key words: Returning straw to field, Biological microbial agents, Maize, Photosynthesis characteristics, Diurnal variation, Light response curve, Yield

CLC Number: 

  • S513