Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2024, Vol. 40 ›› Issue (20): 37-45.doi: 10.11924/j.issn.1000-6850.casb2023-0868

Previous Articles     Next Articles

Effects of Rhizophagus intraradices on Biomass of Rotational Cropping and Alternate Cropping Soybean

ZHANG Min(), JIE Weiguang(), TAN Yiwen, KAN Lianbao, MENG Jianxia, SUN Shanshan, ZHANG Yong, SHI He, ZHANG Siyi   

  1. Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education / Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region / Key Laboratory of Microbiology, College of Heilongjiang Province /School of Life Sciences, Heilongjiang University, Harbin 150080
  • Received:2023-12-22 Revised:2024-04-15 Online:2024-07-11 Published:2024-07-11

Abstract:

The purpose of this study was to investigate the role of Rhizophagus intraradices in alleviating alternate cropping resistance and increasing soybean biomass. The soybean variety ‘Heinong 48’ was used as experimental material. The spore density of arbuscular mycorrhizal (AM) fungi, the colonization rate of AM fungi, and the soybean biomass were determined using wet sieve decantation-sucrose centrifugation, alkali separation-acid fuchsin method and direct measurement, respectively. The results showed that the AM fungi spore density in the rhizosphere soil of rotational cropping soybean field was 2.2 times higher than that of alternate cropping soybean field. Under natural soil conditions, the AM fungal colonization rate of soybean roots and soybean biomass significantly increased after inoculation with R. intraradices in the rotational cropping and alternate cropping soil compared to the untreated group. Additionally, the root length was the most significantly increased by 31.60% and 33.57%, respectively. The soybean biomass inoculated with R. intraradices in the rotational cropping soil was similar to that of the untreated group in the alternate cropping soil. Under the same inoculation conditions, the AM fungal colonization rate of soybean roots and the soybean biomass in the sterilized soil were lower than those in the natural soil. This study laid a theoretical foundation for alleviating the obstacle of soybean alternate cropping resistance and improving soybean yield.

Key words: soybean, rotational cropping and alternate cropping, alternate cropping resistance, rhizophagus intraradices, colonization rate, biomass, arbuscular mycorrhizal fungal spore density