中国农业科学2025，Vol.58Issue(11)：2176-2189,14.DOI:10.3864/j.issn.0578-1752.2025.11.008
间作大豆对木薯生长及连作土壤特性的影响
Effects of Intercropping Soybean on Cassava Growth and Soil Characteristics
摘要
Abstract
[Objective]This study aimed to explore the impacts of cassava/soybean intercropping patterns on the growth of cassava and its continuous cropping soil,to analyze the potential of cassava/soybean intercropping patterns to alleviate the obstacles of cassava continuous cropping,so as to provide theoretical references for alleviating the obstacles of cassava continuous cropping.[Method]On the continuous cropping soil of cassava,the differences in physical and chemical properties of rhizosphere soil,microbial species diversity,community structure between cassava monoculture and cassava/soybean intercropping patterns were compared,and the impacts of cassava/soybean intercropping patterns on the continuous cropping soil of cassava were explored;the differences in plant height,stem thickness,yield,and photosynthetic characteristics between the two planting patterns were compared too,and the correlation between soil physical and chemical properties,microbial species diversity,community structure,and plant height,stem thickness,yield,and photosynthetic characteristics of cassava were analyzed to clarify the impact and mechanism of cassava/soybean intercropping patterns on the growth of cassava.[Result](1)In a 3-year trial,compared with the continuous monoculture of cassava,soil pH,porosity,organic matter content,alkali-hydrolyzable nitrogen content,bacterial number,fungal number,plant height,yield,photosynthetic rate,and transpiration rate under the cassava/soybean intercropping pattern increased year by year,while soil bulk density decreased year by year,and the differences in these indicators reached significant levels in the second or third year of the trial.(2)Cassava/soybean intercropping had little effect on the species diversity of bacteria and fungi in the continuous cropping soil of cassava,but had a significant impact on the composition and relative abundance of dominant bacterial communities in the continuous cropping soil of cassava,among which the impact on the abundance of the beneficial fungus Trichoderma was the most significant.(3)Soil pH showed a significantly positively correlated with the transpiration rate of cassava leaves;Soil organic matter content showed a significantly positively correlated with plant height,photosynthetic rate and transpiration rate of cassava leaves;Soil porosity and alkali-hydrolyzable nitrogen content both showed a significantly positively correlated with the photosynthetic rate and transpiration rate of cassava leaves;The relative abundance of Trichoderma showed a significantly positively correlated with the stem diameter,plant height,yield,photosynthetic rate and transpiration rate of cassava leaves.[Conclusion]The cassava/soybean intercropping pattern could improve the pH,porosity,organic matter content,and alkali-hydrolyzable nitrogen content of the continuous cropping soil of cassava,regulate the soil microbial community structure,recruit a large number of potential beneficial fungi Trichoderma,and alleviate the adverse factors,such as soil acidification,hardening,and nutrient decline in the continuous cropping soil of cassava,thereby promoting the growth of cassava and having a relieving effect on the obstacles of cassava continuous cropping.关键词
木薯大豆间作/木薯生长/连作土壤/土壤理化性质/微生物多样性Key words
cassava/soybean intercropping/cassava growth/continuous cropping soil/soil physical and chemical properties/microorganisms引用本文复制引用
陈会鲜,梁振华,李天元,曹升,李喜弟,韦均参,何文,阮丽霞,黄小娟,兰秀,蔡兆琴,李恒锐,黄珍玲,韦婉羚..间作大豆对木薯生长及连作土壤特性的影响[J].中国农业科学,2025,58(11):2176-2189,14.基金项目
国家自然科学基金(32260445)、广西青年基金项目(2023GNSFBA026150)、广西农业科学院基本科研业务专项(桂农科2023YM41、桂农科2023YM25)、科技先锋队专项(桂农科盟202514) （32260445）
