首页 | 本学科首页   官方微博 | 高级检索  
   检索      


Bacterial endophytes and root hairs
Authors:Mercado-Blanco  Jesús  Prieto  Pilar
Institution:1.Departamento de Protección de Cultivos, Instituto de Agricultura Sostenible, Consejo Superior de Investigaciones Científicas (CSIC), Apartado 4084, 14080, Córdoba, Spain
;2.Departamento de Mejora Genética Vegetal, Instituto de Agricultura Sostenible, Consejo Superior de Investigaciones Científicas (CSIC), Apartado 4084, 14080, Córdoba, Spain
;
Abstract:

Aims

This study aimed to measure the effect of plant diversity on N uptake in grasslands and to assess the mechanisms contributing to diversity effects.

Methods

Annual N uptake into above- and belowground organs and soil nitrate pools were measured in the Jena experiment on a floodplain soil with mixtures of 2–16 species and 1–4 functional groups, and monocultures. In mixtures, the deviation of measured data from data expected from monoculture performance was calculated to assess the contribution of complementarity/facilitation and selection.

Results

N uptake varied from <1 to 45 g?N m?2 yr?1, and was higher in grasslands with than without legumes. On average, N uptake was higher in mixtures (21?±?1 g?N m?2 yr?1) than monocultures (13?±?1 g?N m?2 yr?1), and increased with species richness in mixtures. However, compared to N uptake expected from biomass proportions of species in mixtures, N uptake of mixtures was only slightly higher and a significant surplus N uptake was confined to mixtures containing legumes and non-legumes.

Conclusions

In our study, high N uptake of species rich mixtures was mainly due to dominance of productive species and facilitation by legumes whereas complementarity among non-legumes was of minor relevance.
Keywords:
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号