间作作物种间相互作用对马铃薯根际土壤丛枝菌根真菌的影响

doi:: 10.13292/j.1000-4890.202101.030

生态学杂志 ›› 2021, Vol. 40 ›› Issue (1): 131-139.doi: : 10.13292/j.1000-4890.202101.030

间作作物种间相互作用对马铃薯根际土壤丛枝菌根真菌的影响

伏云珍^1,2,马琨^1,2,3*,崔慧珍³,李光文³

（¹宁夏大学西北土地退化与生态恢复国家重点实验室培育基地，银川 750021；²宁夏大学西北退化生态系统恢复与重建教育部重点实验室，银川 750021；³宁夏大学农学院，银川 750021）

出版日期:2021-01-10 发布日期:2021-06-10

Effects of interspecific interactions between intercropping crops on arbuscular mycorrhizal fungi in potato rhizosphere soil in the intercropping system.

FU Yun-zhen^1,2, MA Kun^1,2,3*, CUI Hui-zhen³, LI Guang-wen³

(¹National Key Laboratory Breeding Base of Northwest Land Degradation and Ecological Restoration, Ningxia University, Yinchuan 750021, China; ²Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwestern China of Ministry of Education, Ningxia University, Yinchuan 750021, China; ³College of Agriculture, Ningxia University, Yinchuan 750021, China).

Online:2021-01-10 Published:2021-06-10

摘要/Abstract

摘要： 为揭示间作作物种间相互作用对土壤丛枝菌根（AM）真菌的影响，以马铃薯单作（T0）为对照，基于高通量测序平台的方法，研究了连续3年马铃薯‖玉米（T1）、马铃薯‖蚕豆（T2）下马铃薯根际土壤AM真菌群落组成、多样性与土壤环境因子间的相互关系。结果表明：共获得2893个AM真菌操作分类单元（OTUs），分属1门、3纲、4目、8科、11属、104种；幼套近明囊霉（Claroideoglomus）、球囊霉属（Glomus）、类球囊霉属（Paraglomus）为AM真菌优势属。玉米、蚕豆与马铃薯间作均改变了马铃薯根际土壤AM真菌属水平上的相对丰度；与T0相比，T1处理下幼套近明囊霉相对丰度降低，球囊霉属和类球囊霉属相对丰度增加；T2处理下幼套近明囊霉相对丰度增加，但球囊霉属和类球囊霉属相对丰度却降低。Metastats检验表明：T1和T2处理下，马铃薯根际土壤类球囊霉属AM真菌相对丰度存在显著差异（P=0.024），耳孢囊霉属（Otospora）在T0和T2处理间存在极显著差异（P=0.005）；土壤AM真菌香农指数在T1与T2间有显著差异（P<0.05）。主成分分析表明：T0和T1处理下，马铃薯根际土壤AM真菌群落组成较为接近；土壤碱解氮与AM真菌香农多样性指数呈显著负相关（P=0.043），基于属水平上的AM真菌幼套近明囊霉相对丰度与碱解氮呈极显著正相关（P=0.006），原囊霉属（Archaeospora）的相对丰度与速效磷呈显著正相关（P=0.046）。马铃薯间作玉米、蚕豆为主的种植模式具有间作优势，种间相互作用能改变马铃薯根际土壤AM真菌群落组成，这对于合理间作作物选择，稳定农业生态系统具有重要意义。

关键词: 马铃薯, 种间作用, 丛枝菌根真菌, 土地当量比, 根际, 土壤特性

Abstract: To test whether the interspecific interactions between intercropping crops would affect soil arbuscular mycorrhizal (AM) fungal community, we conducted a three-year field experiment with potato monoculture (T0) as control, and intercropping systems including potato‖maize (T1), potato‖faba bean (T2). Based on highthroughput sequencing, we analyzed the relationship of AM fungal community composition and diversity with rhizosphere soil properties of potato plants in T1 and T2. The results showed that 2893 OTUs of AM fungi were obtained, which could be classified into 1 phylum, 3 classes, 4 orders, 8 families, 11 genera, and 104 species. Claroideoglomus, Glomus and Paraglomus were the dominant genera across all the treatments. Both maize and faba bean intercropped with potato changed the relative abundance of AM fungi. Compared to T0, the relative abundance of Claroideoglomus was decreased and that ofGlomus and Paraglomus was increased under T1 treatment. Under T2 treatment, the relative abundance ofClaroideoglomus was higher than that of T0, but that of Glomus and Paraglomus had an opposite trend. Results of Metastats test showed a significant difference in the relative abundance of Paraglomus in potato rhizosphere soil between T1 and T2 treatments (P=0.024), and a significant difference in the relative abundance of Otospora between T0 and T2 treatments (P=0.005). The AM fungal Shannon index in potato rhizosphere soil was significantly different between T1 and T2 (P<0.05). Results of principal component analysis showed that the composition of AM fungal community in potato rhizosphere soil was similar under T0 and T1 treatments. There was a significant negative correlation between soil available nitrogen and AM fungal Shannon diversity (P=0.043). The relative abundance ofClaroideoglomus at the genus level was significantly positively correlated with the concentration of available nitrogen (P=0.006). There was a significant positive correlation between the relative abundance ofArchaeospora and the concentration of available phosphorus (P=0.046). Our results suggested that potato intercropped with maize or faba bean showed a great advantage than monoculture. Interspecific interaction significantly changed the composition of AM fungal community in the rhizosphere soil, suggesting that the selection of intercrops plays an important role in developing intercropping system and stabilizing agroecosystem.

Key words: potato, interspecific interaction, arbuscular mycorrhizal fungi, land equivalentratio, rhizosphere, soil property.

伏云珍, 马琨, 崔慧珍, 李光文. 间作作物种间相互作用对马铃薯根际土壤丛枝菌根真菌的影响 [J]. 生态学杂志, 2021, 40(1): 131-139.

FU Yun-zhen, MA Kun, CUI Hui-zhen, LI Guang-wen. Effects of interspecific interactions between intercropping crops on arbuscular mycorrhizal fungi in potato rhizosphere soil in the intercropping system.[J]. Chinese Journal of Ecology, 2021, 40(1): 131-139.

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间作作物种间相互作用对马铃薯根际土壤丛枝菌根真菌的影响

Effects of interspecific interactions between intercropping crops on arbuscular mycorrhizal fungi in potato rhizosphere soil in the intercropping system.

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