Neugschwandter, R. W. & Kaul, H. P. Sowing ratio and N fertilization affect yield and yield components of oat and pea in intercrops. Field Crops Res. 155, 159–163 (2014).
Google Scholar
Hu, F. et al. Low N fertilizer application and intercropping increases N concentration in pea (Pisum sativum L.) grains. Front Plant Sci. 9, 1763 (2018).
Google Scholar
Jensen, E. S., Carlsson, G. & Hauggaard-Nielsen, H. Intercropping of grain legumes and cereals improves the use of soil N resources and reduces the requirement for synthetic fertilizer N: a global-scale analysis. Agron. Sustain. Dev. 40, 5 (2020).
Google Scholar
Jannoura, R., Joergensen, R. G. & Bruns, C. Organic fertilizer effects on growth, crop yield, and soil microbial biomass indices in sole and intercropped peas and oats under organic farming conditions. Eur. J. Agron. 52, 259–270 (2014).
Google Scholar
Darch, T. et al. Inter- and intra-species intercropping of barley cultivars and legume species, as affected by soil phosphorus availability. Plant Soil 427, 125–138 (2018).
Google Scholar
Monti, M., Pellicanò, A., Santonoceto, C., Preiti, G. & Pristeri, A. Yield components and nitrogen use in cereal-pea intercrops in Mediterranean environment. Field Crops Res. 196, 379–388 (2016).
Google Scholar
Scalise, A., Pappa, V. A., Gelsomino, A. & Rees, R. M. Pea cultivar and wheat residues affect carbon/nitrogen dynamics in pea-triticale intercropping: a microcosms approach. Sci. Tot. Environ. 592, 436–450 (2017).
Google Scholar
Bedoussac, L. et al. Ecological principles underlying the increase of productivity achieved by cereal-grain legume intercrops in organic farming. A review. Agron. Sustain. Dev. 35, 911–935 (2015).
Google Scholar
Garcia, K., Doidy, J., Zimmermann, S. D., Wipf, D. & Courty, P. E. Take a trip through the plant and fungal transportome of mycorrhiza. Trends Plant Sci. 21, 937–950 (2016).
Google Scholar
Oelbermann, M., Regehr, A. & Echarte, L. Changes in soil characteristics after six seasons of cereal–legume intercropping in the Southern Pampa. Geoderma Reg. 4, 100–107 (2015).
Google Scholar
Wichern, F., Eberhardt, E., Mayer, J., Joergensen, R. G. & Müller, T. Nitrogen rhizodeposition in agricultural crops: methods, estimates and future prospects. Soil Biol. Biochem. 40, 30–48 (2008).
Google Scholar
Pausch, J., Tian, J., Riederer, M. & Kuzyakov, Y. Estimation of rhizodeposition at field scale: upscaling of a 14C labeling study. Plant Soil 364, 273–285 (2013).
Google Scholar
Fustec, J., Lesuffleur, F., Mahieu, S. & Cliquet, J. B. Nitrogen rhizodeposition of legumes. A review. Agron. Sustain. Dev. 30, 57–66 (2010).
Google Scholar
Hupe, A. et al. Get on your boots: estimating root biomass and rhizodeposition of peas under field conditions reveals the necessity of field experiments. Plant Soil 443, 449–462 (2019).
Google Scholar
Parniske, M. Arbuscular mycorrhiza: the mother of plant root endosymbioses. Nat. Rev. Microbiol. 6, 763–775 (2008).
Google Scholar
Jones, D. L., Hodge, A. & Kuzyakov, Y. Plant and mycorrhizal regulation of rhizodeposition. New Phytol. 163, 459–480 (2004).
Google Scholar
Hupe, A. et al. Even flow? Changes of carbon and nitrogen release from pea roots over time. Plant Soil 431, 143–157 (2018).
Google Scholar
He, X., Xu, M., Qiu, C. Y. & Zhou, J. Use of 15N stable isotope to quantify nitrogen transfer between mycorrhizal plants. J. Plant Ecol. 2, 107–118 (2009).
Google Scholar
Pepe, A., Giovannetti, M. & Sbrana, C. Lifespan and functionality of mycorrhizal fungal mycelium are uncoupled from host plant lifespan. Sci. Rep. 8, 10235 (2018).
Google Scholar
Xiao, Y., Li, L. & Zhang, F. Effect of root contact on interspecific competition and N transfer between wheat and faba bean using direct and indirect 15N techniques. Plant Soil 262, 45–54 (2004).
Google Scholar
Thilakarathna, M. S., McElroy, M. S., Chapagain, T., Papadopoulos, Y. A. & Raizada, M. N. Belowground nitrogen transfer from legumes to non-legumes under managed herbaceous cropping systems. A review. Agron. Sustain. Dev. 36, 58 (2016).
Google Scholar
Meng, L. et al. Arbuscular mycorrhizal fungi and rhizobium facilitate nitrogen uptake and transfer in soybean/maize intercropping system. Front Plant Sci. 6, 339 (2015).
Google Scholar
Shao, Z. et al. Root contact between maize and alfalfa facilitates nitrogen transfer and uptake using techniques of foliar 15N-labeling. Agronomy 10, 360 (2020).
Google Scholar
Duc, G., Trouvelot, A., Gianinazzi-Pearson, V. & Gianinazzi, S. First report of non-mycorrhizal plant mutants (Myc−) obtained in pea (Pisum sativum L.) and fababean (Vicia faba L.). Plant Sci. 60, 215–222 (1989).
Google Scholar
Kleikamp, B. & Joergensen, R. G. Evaluation of arbuscular mycorrhiza with symbiotic and nonsymbiotic pea isolines at three sites in the Alentejo, Portugal. J. Plant Nutr. Soil Sci. 169, 661–669 (2006).
Google Scholar
Jannoura, R., Kleikamp, B., Dyckmans, J. & Joergensen, R. G. Impact of pea growth and of arbuscular mycorrhizal fungi on the decomposition of 15N-labeled maize residues. Biol. Fertil. Soils 48, 547–560 (2012).
Google Scholar
Chalk, P. M. et al. Methodologies for estimating nitrogen transfer between legumes and companion species in agro-ecosystems: a review of 15N-enriched techniques. Soil Biol. Biochem. 73, 10–21 (2014).
Google Scholar
Wahbi, S. et al. Enhanced transfer of biologically fixed N from faba bean to intercropped wheat through mycorrhizal symbiosis. Appl. Soil Ecol. 107, 91–98 (2016).
Google Scholar
Ingraffia, R., Amato, G., Frenda, A. S. & Giambalvo, D. Impacts of arbuscular mycorrhizal fungi on nutrient uptake, N2 fixation, N transfer, and growth in a wheat/faba bean intercropping system. PLoS ONE 14, e0213672 (2019).
Google Scholar
Fusconi, A. Regulation of root morphogenesis in arbuscular mycorrhizae, what role do fungal exudates, phosphate, sugars and hormones play in lateral root formation. Ann. Bot. 113, 19–33 (2014).
Google Scholar
Wang, W. et al. Nutrient exchange and regulation in arbuscular mycorrhizal symbiosis. Mol. Plant 10, 1147–1158 (2017).
Google Scholar
Xue, Y. et al. Crop acquisition of phosphorus, iron and zinc from soil in cereal/legume intercropping systems: a critical review. Ann. Bot. 117, 363–377 (2016).
Google Scholar
Abdelhalim, T., Jannoura, R. & Joergensen, R. G. Mycorrhiza response and phosphorus acquisition efficiency of sorghum cultivars differing in strigolactone composition. Plant Soil 437, 55–63 (2019).
Google Scholar
Louarn, G. et al. The amounts and dynamics of nitrogen transfer to grasses differ in alfalfa and white clover-based grass-legume mixtures as a result of rooting strategies and rhizodeposit quality. Plant Soil 389, 289–305 (2015).
Google Scholar
Faust, S., Kaiser, K., Wiedner, K., Glaser, B. & Joergensen, R. G. Comparison of different methods to determine lignin concentration and quality in herbaceous and woody plant residues. Plant Soil 433, 7–18 (2018).
Google Scholar
Baldrian, P. et al. Production of extracellular enzymes and degradation of biopolymers by saprotrophic microfungi from the upper layers of forest soil. Plant Soil 338, 1–15 (2011).
Google Scholar
Wichern, F., Andreeva, D., Joergensen, R. G. & Kuzyakov, Y. Distribution of applied 14C and 15N in legumes using two different labelling methods. J. Plant Nutr. Soil Sci. 174, 732–741 (2011).
Google Scholar
Turner, T. R. et al. Comparative metatranscriptomics reveals kingdom level changes in the rhizosphere microbiome of plants. ISME J. 7, 2248–2258 (2013).
Google Scholar
Yu, L., Nicolaisen, M., Larsen, J. & Ravnskov, S. Molecular characterization of root-associated fungal communities in relation to health status of Pisum sativum using barcoded pyrosequencing. Plant Soil 357, 395–405 (2012).
Google Scholar
Gunina, A. & Kuzyakov, Y. Sugars in soil and sweets for microorganisms: review of origin, content, composition and fate. Soil Biol. Biochem. 90, 87–100 (2015).
Google Scholar
Allison, S. D. Cheaters, diffusion and nutrients constrain decomposition by microbial enzymes in spatially structured environments. Ecol. Lett. 8, 626–635 (2005).
Google Scholar
Joergensen, R. G. & Wichern, F. Alive and kicking: why dormant soil microorganisms matter. Soil Biol. Biochem. 116, 419–430 (2018).
Google Scholar
IUSS Working Group. WRB World reference base for soil resources 2014 (update 2015), international soil classification system for naming soils and creating legends for soil maps. World Soil Resources Reports (2015).
Mahieu, S., Fustec, J., Jensen, E. S. & Crozat, Y. Does labelling frequency affect N rhizodeposition assessment using the cotton-wick method?. Soil Biol. Biochem. 41, 2236–2243 (2009).
Google Scholar
Russell, C. A. & Fillery, I. R. P. Estimates of lupin below-ground biomass nitrogen, drymatter, and nitrogen turnover to wheat. Crop Pasture Sci. 47, 1047–1059 (1996).
Google Scholar
Wichern, F., Mayer, J., Joergensen, R. & Müller, T. Evaluation of the wick method for in situ 13C and 15N labelling of annual plants using sugar-urea mixtures. Plant Soil 329, 105–115 (2010).
Google Scholar
Phillips, J. M. & Hayman, D. S. Improved procedures for clearing roots and staining parasitic and vesicular-arbuscular mycorrhizal fungi for rapid assessment of infection. Transact. Brit. Mycol. Soc. 55, 158–168 (1970).
Google Scholar
Brookes, P. C., Landman, A., Pruden, G. & Jenkinson, D. S. Chloroform fumigation and the release of soil nitrogen. A rapid direct extraction method to measure microbial biomass nitrogen in soil. Soil Biol. Biochem. 17, 837–842 (1985).
Google Scholar
Vance, E. D., Brookes, P. C. & Jenkinson, D. S. An extraction method for measuring soil microbial biomass C. Soil Biol. Biochem. 19, 703–707 (1987).
Google Scholar
Mueller, T., Joergensen, R. G. & Meyer, B. Estimation of soil microbial biomass C in the p resence of living roots by fumigation-extraction. Soil Biol. Biochem. 24, 179–181 (1992).
Google Scholar
Wu, J., Joergensen, R. G., Pommerening, B., Chaussod, R. & Brookes, P. C. Measurement of soil microbial biomass C by fumigation-extraction—an automated procedure. Soil Biol. Biochem. 22, 1167–1169 (1990).
Google Scholar
Hupe, A., Schulz, H., Bruns, C., Joergensen, R. G. & Wichern, F. Digging in the dirt—inadequacy of below-ground plant biomass quantification. Soil Biol. Biochem. 96, 137–144 (2016).
Google Scholar
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