间作甘蔗对玉米根际微生物功能多样性的影响

生态学杂志

间作甘蔗对玉米根际微生物功能多样性的影响

郑亚强¹,杜广祖¹,李亦菲¹,陈斌^1*,李正跃¹,肖关丽^2*

（¹云南农业大学植物保护学院，农业生物多样性与病虫害控制教育部重点实验室，昆明 650201；²云南农业大学农学与生物技术学院，昆明 650201)

出版日期:2018-07-10 发布日期:2018-07-10

Effects of intercropping sugarcane on functional diversity of maize rhizosphere microorganisms.

ZHENG Ya-qiang¹, DU Guang-zu, LI Yi-fei¹, CHEN Bin^1*, LI Zheng-yue¹, XIAO Guan-li^2*

(¹Key Laboratory of Agrobiodiversity and Pest Management of China’s Ministry of Education/College of Plant Protection, Yunnan Agricultural University, Kunming 650201, China; ²College of Agronomy and Biotechnology, Yunnan Agricultural University, Kunming 650201, China).

Online:2018-07-10 Published:2018-07-10

摘要/Abstract

摘要： 在云南省玉溪市元江县和德宏州陇川县甘蔗种植区分别设置甘蔗间作玉米和单作玉米田小区试验，采用Biolog-CO板测定了不同气候条件下间作玉米与单作玉米根际微生物代谢功能多样性。结果表明：在陇川和元江试验区，间作玉米根际微生物的平均颜色变化率（AWCD）相对于单作玉米分别提高了28.50%和42.32%，Shannon指数和Simpson指数高于单作玉米田；从土壤微生物对碳源的利用率来看，两个试验区的间作玉米根际微生物对22种碳源的利用率高于单作玉米田，对2种碳源的利用率低于单作玉米田，两试验区间作与单作玉米根际微生物对碳源的利用率变化规律不尽一致的碳源有7种。由此表明，间作提高了玉米根际微生物对大部分碳源的利用率，并且在不同试验区有所差异。主成分分析表明，元江和陇川试验区间作玉米和单作玉米根际微生物群落结构明显不同。综上所述，在甘蔗玉米间作体系中，间作玉米根际微生物相对于单作玉米根际微生物群落多样性较高、根际微生物活性较强。该研究结果可为玉米甘蔗间作对土壤微生物活性影响研究提供理论基础。

关键词: 植物器官, 非结构性碳水化合物, 碳饥饿, 可溶性糖, 淀粉

Abstract: The metabolic function diversity of maize rhizosphere microorganisms in maize monoculture system and maize/sugarcane intercropping system was examined in Yuanjiang and Longchuan counties of Yunnan Province by Biolog-ECO techniques. The results showed that the average well color development (AWCD) of microbial communities in rhizosphere soils in intercropping maize increased by 28.50% and 42.32% than that in monoculture system at both sites, respectively. The Shannon index of rhizosphere microorganisms in intercropping maize system was higher than that in monoculture system at both sites. The utilization rate of 22 carbon sources by rhizosphere microorganisms increased, while the utilization rate of other two carbon sources decreased in intercropping system than in monoculturesystem. However, seven kinds of carbon sources had no consistent pattern in utilization rate between intercropping and monoculture systems in both sites. Intercropping increased the carbon source utilization rate than monocropping, but with geographic differences. The results of principal component analysis (PCA) showed that the rhizosphere microbial community composition and metabolic function were different between intercropping and monoculture systems. In conclusion, diversity, activities, and metabolic function of soil rhizosphere microbial community were higher in the maize/sugarcane intercropping system than that in maize monoculture. The results will provide a theoretical basis for examining the effects of maize/sugarcane intercropping on the activity of rhizosphere microbial community.

Key words: carbon starvation, soluble sugar, plant organ, starch, non-structural carbohydrate

郑亚强,杜广祖,李亦菲,陈斌,李正跃,肖关丽. 间作甘蔗对玉米根际微生物功能多样性的影响[J]. 生态学杂志.

ZHENG Ya-qiang, DU Guang-zu, LI Yi-fei, CHEN Bin, LI Zheng-yue, XIAO Guan-li. Effects of intercropping sugarcane on functional diversity of maize rhizosphere microorganisms.[J]. cje.

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