title: The dynamic process of interspecific interactions of competitive nitrogen capture between intercropped wheat (Triticum aestivum L.) and Faba Bean (Vicia faba L.).
abstract: Wheat (Triticum aestivum L.)/faba bean (Vicia faba L.) intercropping shows significant overyielding and high nitrogen (N)-use efficiency, but the dynamics of plant interactions have rarely been estimated. The objective of the present study was to investigate the temporal dynamics of competitive N acquisition between intercropped wheat and faba bean with the logistic model. Wheat and faba bean were grown together or alone with limited N supply in pots. Data of shoot and root biomass and N content measured from 14 samplings were fitted to logistic models to determine instantaneous rates of growth and N uptake. The superiority of instantaneous biomass production and N uptake shifted from faba bean to wheat with their growth. Moreover, the shift of superiority on N uptake occurred 7-12 days earlier than that of biomass production. Interspecific competition stimulated intercropped wheat to have a much earlier and stronger superiority on instantaneous N uptake compared with isolated wheat. The modeling methodology characterized the temporal dynamics of biomass production and N uptake of intercropped wheat and faba bean in different planting systems, which helps to understand the underlying process of plant interaction for intercropping plants.
authors.affiliation: Center for Resources, Environment and Food Security (CREFS), China Agricultural University, Beijing, 100193, China.
authors.forename: Chunjie
authors.initials: C
authors.lastname: Li
authors.affiliation: College of Resources and Environment, Yunnan Agricultural University, Kunming, 650201, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Dong
authors.affiliation: Center for Resources, Environment and Food Security (CREFS), China Agricultural University, Beijing, 100193, China.
authors.forename: Haigang
authors.initials: H
authors.lastname: Li
authors.affiliation: Center for Resources, Environment and Food Security (CREFS), China Agricultural University, Beijing, 100193, China.
authors.forename: Jianbo
authors.initials: J
authors.lastname: Shen
authors.affiliation: Center for Resources, Environment and Food Security (CREFS), China Agricultural University, Beijing, 100193, China.
authors.forename: Fusuo
authors.initials: F
authors.lastname: Zhang
mesh_terms: D001692:Biological Transport; D018533:Biomass; D008954:Models, Biological; D009584:Nitrogen / Q000378:metabolism*; D013045:Species Specificity; D013997:Time Factors; D014908:Triticum / Q000254:growth & development* / Q000378:metabolism*; D031307:Vicia faba / Q000254:growth & development* / Q000378:metabolism*
chemical_list: D009584:Nitrogen