caa a22 4500 463208854 CHVBK 20180405153134.0 cr unu---uuuuu 170326e20070201xx s 000 0 eng 10.1007/s10705-006-9053-7 doi (NATIONALLICENCE)springer-10.1007/s10705-006-9053-7 Competition for and utilisation of sulfur in sole and intercrops of pea and barley [Elektronische Daten] [Mette Andersen, Henrik Hauggaard-Nielsen, Henning Høgh-Jensen, Erik Jensen] Deficiency of plant available sulfur (S) has been recognised as a limiting factor for crop production in many regions of the world. However, knowledge of the effect that low S availability has on the growth dynamics and nitrogen (N) use of cereal-legume intercrops is limited. Pea (Pisum sativum L.) and barley (Hordeum vulgare L.) were grown in a pot experiment as sole crops and intercrops with or without the addition of S in the form of gypsum. At three consecutive harvests total aboveground biomass and corresponding soil samples were taken for analysis. Harvested biomass was analysed for total S and N content and soil samples for their sulfate content. The cumulative Relative Efficiency Index (REIc) was used to study the interspecies growth, N and S dynamics in the intercrop and the Land Equivalent Ratio (LER) was used to evaluate intercrop performance. In the initial growth phase earlier germination gave barley a growth and nutrient use advantage compared to pea (REIc values <1). However, shortly after this pioneer phase, the importance of initial size differences decreased relative to the effect of species identity in determining the competitive strength of the two species and by the end of the growth period pea was very dominant (REIc values >1). The limited availability of soil N played a pivotal role in creating the nutrient and growth dynamics observed in the intercrop and increasing the availability of S did not change this markedly. Most likely as a result of its N2 fixing ability the pea component came to dominate the intercrop both with respect to yield and nutrient accumulation, accounting for 77% of total dry matter production, 90% of N uptake and 85% of S uptake, averaged across S treatments. LER values calculated on the basis of total aboveground dry matter, and N and S accumulation all exceeded 1, indicating that available growth resources were used more efficiently by the intercrop than the average sole crop. Springer Science+Business Media B.V., 2006 Biomass production nationallicence cumulative Relative Efficiency Index (REIc) nationallicence Intercropping nationallicence Land Equivalent Ratio (LER) nationallicence Nitrogen nationallicence Sulfur nationallicence Andersen Mette Biosystems Department, RISØ National Laboratory, Frederiksborgvej 399, 4000, Roskilde, Denmark aut Hauggaard-Nielsen Henrik Biosystems Department, RISØ National Laboratory, Frederiksborgvej 399, 4000, Roskilde, Denmark aut Høgh-Jensen Henning Department of Agricultural Sciences, The Royal Veterinary and Agricultural University, Højbakkegaard Allé 13, 2630, Taastrup, Denmark aut Jensen Erik Biosystems Department, RISØ National Laboratory, Frederiksborgvej 399, 4000, Roskilde, Denmark aut Nutrient Cycling in Agroecosystems Kluwer Academic Publishers 77/2(2007-02-01), 143-153 1385-1314 77:2<143 2007 77 10705 https://doi.org/10.1007/s10705-006-9053-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10705-006-9053-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Andersen Mette Biosystems Department, RISØ National Laboratory, Frederiksborgvej 399, 4000, Roskilde, Denmark aut NATIONALLICENCE 700 1- Hauggaard-Nielsen Henrik Biosystems Department, RISØ National Laboratory, Frederiksborgvej 399, 4000, Roskilde, Denmark aut NATIONALLICENCE 700 1- Høgh-Jensen Henning Department of Agricultural Sciences, The Royal Veterinary and Agricultural University, Højbakkegaard Allé 13, 2630, Taastrup, Denmark aut NATIONALLICENCE 700 1- Jensen Erik Biosystems Department, RISØ National Laboratory, Frederiksborgvej 399, 4000, Roskilde, Denmark aut NATIONALLICENCE 773 0- Nutrient Cycling in Agroecosystems Kluwer Academic Publishers 77/2(2007-02-01), 143-153 1385-1314 77:2<143 2007 77 10705 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer