贾广军, 张仕颖, 谷林静, 张乃明, 张龙杰, 段红平, 夏运生. 菌根对紫色土上间作玉米生长及磷素累积的影响[J]. 中国生态农业学报(中英文), 2014, 22(5): 516-524. DOI: 10.3724/SP.J.1011.2014.31105
引用本文: 贾广军, 张仕颖, 谷林静, 张乃明, 张龙杰, 段红平, 夏运生. 菌根对紫色土上间作玉米生长及磷素累积的影响[J]. 中国生态农业学报(中英文), 2014, 22(5): 516-524. DOI: 10.3724/SP.J.1011.2014.31105
JIA Guangjun, ZHANG Shiying, GU Linjing, ZHANG Naiming, ZHANG Longjie, DUAN Hongping, XIA Yunsheng. Effect of mycorrhizal inoculation on growth and phosphorus accumulation of intercropped maize on purple soil[J]. Chinese Journal of Eco-Agriculture, 2014, 22(5): 516-524. DOI: 10.3724/SP.J.1011.2014.31105
Citation: JIA Guangjun, ZHANG Shiying, GU Linjing, ZHANG Naiming, ZHANG Longjie, DUAN Hongping, XIA Yunsheng. Effect of mycorrhizal inoculation on growth and phosphorus accumulation of intercropped maize on purple soil[J]. Chinese Journal of Eco-Agriculture, 2014, 22(5): 516-524. DOI: 10.3724/SP.J.1011.2014.31105

菌根对紫色土上间作玉米生长及磷素累积的影响

Effect of mycorrhizal inoculation on growth and phosphorus accumulation of intercropped maize on purple soil

  • 摘要: 丛枝菌根真菌(arbuscular mycorrhizal fungi, AMF)在土壤与植物系统的磷素循环中发挥着关键的作用。本文通过盆栽模拟试验研究了不同AMF接种状况不接种(NM)、接种Glomus mosseae(GM)、接种G. etunicatum(GE)和玉米/大豆间作体系不同根系分隔方式(不分隔、尼龙网分隔、塑料膜分隔)对间作玉米植株生长及磷素吸收累积的影响。研究结果表明: GM处理下的间作玉米根系侵染率在不同根系分隔方式之间的差异不显著, 而GE处理则在塑料膜分隔处理下对玉米的侵染率最高。接种不同AMF对间作玉米促生效果不同, GM和GE处理在不同根系分隔情况下表现出各自的优势, 与未接种处理相比, GM处理能使玉米生物量、株高有一定程度增加并在根系不分隔处理下玉米磷吸收较多、生长较好; GE处理能使植株生物量有一定程度增加并在尼龙网分隔处理下的玉米磷吸收较多、生长较好。间作体系不同根系分隔方式对玉米的影响也不同, 其中玉米地上部生物量在根系分隔处理下普遍小于不分隔处理, 但根系生物量的大小情况则刚好相反。另外, 无论何种接种状况, 玉米根系磷含量及吸收量均以尼龙网分隔处理显著较高。而根系磷吸收效率则以接种G. mosseae且不分隔根系处理显著高于分隔处理。所有复合处理中, 以接种G. etunicatum与尼龙网分隔根系组合处理对间作玉米的生长及磷素累积的促进作用最好, 若应用于滇池流域, 可望有效控制坡耕地土壤磷素的迁移。

     

    Abstract: Arbuscular mycorrhizal fungi (AMF) plays a critical role in phosphorus (P) cycle in the soil-plant system. AMF can reduce P fertilization amount through improving utilization ratio of P fertilizer and activating soil P availability. Intercropping system of different crops also increases nutrient uptake and utilization efficiency compared with monoculture system. AMF inoculation in intercropping system to reduce soil P loss has become a research hotspot. However, the beneficial effects of combination of AMF and intercropping on plant growth and P accumulation have not been fully understood on the purple soil. In this study, growth and P accumulation of maize (Zea mays L.) intercropped with soybean on purple soil was studied through a pot cultural experiment under different root separation ways and AMF inoculation. Three inoculation treatments no AMF (NM), Glomus mosseae inoculation (GM), G. etunicatum inoculation (GE) and three roots separation ways (no separation, nylon net separation, plastic-film separation) were set up. The study may provide a theoretical basis for exploring P nutrient use efficiency of intercropping system with AMF technology. Results showed that differences in AMF colonization rate of intercropped maize among different roots separation ways were not significant under GM treatment, while AMF colonization rate was significantly highest under plastic-film separation and G. etunicatum inoculation (GE treatment). Different AMF treatments showed different effects on intercropped maize growth. GE and GM treatments under three roots separation ways showed obviously different advantages. Compared to NM treatment, GM treatment increased dry biomass and plant height of intercropped maize, improved P uptake under no roots separation; while GE treatment increased dry biomass, improved P uptake under nylon net separation of roots. Furthermore, P uptake amount of intercropped maize under AMF inoculation treatments were higher than no AMF inoculation treatments. The shoots dry biomass of intercropped maize was lower under roots separation treatments than not separation treatment, roots dry biomass showed opposite trend. Whether inoculating AMF or not, root P content and uptake were significantly higher under roots separation with nylon net, while root P uptake efficiency was significantly higher under combination of no roots separation and G. mosseae inoculation than under root separation. In conclusion, AMF inoculation could promote plants growth and roots P accumulation, and showed greater advantages under nylon net separation. Nylon net separation of roots significantly improved growth of maize. The treatment of GE inoculation plus roots separation with nylon net was the best one for intercropped maize growth and P accumulation, which could effectively control P loss from slope farmland in the Dianchi Lake Basin.

     

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