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作者:... Georg Carlsson , Karen Søegaard , Jim Rasmussen
来源:[J].Plant and Soil(IF 2.638), 2017, Vol.417 (1-2), pp.169-182
摘要:While N2-fixation in diversified grasslands including forage legumes and non-legumes has been widely studied, N2-fixation in swards containing only forage legumes remains unclear. In this study, we investigated N2-fixation in pure stands and mixtu...
作者:Jim Rasmussen , Georg Carlsson ...
来源:[J].Plant and Soil(IF 2.638), 2017, Vol.413 (1-2), pp.217-230
摘要:There is substantial evidence that legume-derived Nitrogen (N) is transferred to neighboring non-legumes in grassland mixtures. However, there is sparse information about how deep rooted non-legume forage herbs (forbs) influence N transfer in multi-species grasslands.
作者:Jim Rasmussen , Thórey Gylfadóttir ...
来源:[J].Soil Biology and Biochemistry(IF 3.654), 2019, Vol.133, pp.60-71
摘要:Abstract(#br)The supply of nitrogen (N) from legumes is a key in maintaining soil N fertility in plant production with low fertilizer N inputs. Leaf-feeding of isotope tracers is a commonly used methodology to study the flow of carbon (C) and N from legumes into soil and companio...
作者:Jim Rasmussen , Peter Sørensen ...
来源:[J].Field Crops Research(IF 2.474), 2019, Vol.234, pp.15-25
摘要:Abstract(#br)Legume-based cover crop (CC) mixtures can increase nitrogen (N) availability in arable systems, reducing the need for external N inputs, as they retain soil N and fix atmospheric N 2 . However, they need sufficient biomass accumulation to influence soil N availa...
作者:Jim Rasmussen , Peter Sørensen
来源:[J].Agriculture, Ecosystems and Environment(IF 2.859), 2018, Vol.255, pp.1-11
摘要:Abstract(#br)Components of the field nitrogen (N) balance (input and surplus) are often used to predict nitrate leaching from agricultural lands. However, management factors, such as use of catch crops, greatly affect the actual loss and are a key to reduce N leaching. The p...
作者:... Bent T. Christensen , Ingrid K. Thomsen , Jim Rasmussen
来源:[J].Journal of Cereal Science(IF 2.088), 2017, Vol.76, pp.76-84
摘要:Abstract(#br)Multi-element fingerprinting demonstrates some potential for tracing the origin of agricultural products but not for discriminating among crop cultivars and nutrient management (source, rate). With principal component analysis (PCA) and univariate statistics, we exam...
作者:... Ingrid K. Thomsen , Jim Rasmussen , Bent T. Christensen
来源:[J].Field Crops Research(IF 2.474), 2018, Vol.221, pp.257-264
摘要:Abstract(#br)Prediction of optimum fertilizer N requirements depends on reliable estimates of the residual value of N accumulated in soil from historical inputs of mineral fertilizers and animal manures. Using plots embedded in the Askov long-term experiments and treated sin...
作者:Jim Rasmussen , Bente B. Laursen ...
来源:[J].Soil Biology and Biochemistry(IF 3.654), 2018, Vol.123, pp.54-63
摘要:Abstract(#br)Secondary metabolites secreted by microbes and plants act as mediators in plant-microbe interactions including nutrient uptake. However, until now very little is known about their role in nutrient assimilation, particularly amino acids, which are important compounds ...
作者:Jim Rasmussen , Thórey Gylfadóttir ...
来源:[J].Soil Biology and Biochemistry(IF 3.654), 2013, Vol.57, pp.654-662
摘要:Abstract(#br)The N flow dynamics in grass–clover mixtures are not well understood. Spatial distributions and temporal differences in inter- and intra-species N transfer were investigated at field sites in Iceland, Germany, and Denmark, with three different managements at the...
作者:Jim Rasmussen , Karen Søegaard ...
来源:[J].European Journal of Agronomy(IF 2.8), 2011, Vol.36 (1), pp.66-74
摘要:Abstract(#br)Inclusion of forage legumes in low-input forage mixtures improves herbage production and soil fertility through addition of nitrogen (N) from N 2 -fixation. The impact of different grass–legume mixtures on the N contribution of the forage mixture has rarely been...

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