Landesforschungsanstalt fur Landwirtschaft und Fischerei Mecklenburg Vorpommern

Germany

Landesforschungsanstalt fur Landwirtschaft und Fischerei Mecklenburg Vorpommern

Germany
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Jansen G.,Julius Kuhn Institute | Eickmeyer F.,Vormals Saatzucht Steinach GmbH and Co KG | Michel V.,Landesforschungsanstalt fur Landwirtschaft und Fischerei Mecklenburg Vorpommern
Journal fur Kulturpflanzen | Year: 2010

Grain yield and protein content of 12 different narrow-leafed lupins were compared in field studies at different soils. Two year trials were carried out in contrasting soil types, acid soils with a pH of 5.8 and calcareous soils with a pH of 7.1. Plants grown in the calcareous soils showed leaf yellowing, whereas the yellowness index (chlorosis score) did not negatively correlate with the plant high and the final grain yield (Spearman, P ≥ 0,05). In 2004, the mean yield of lupin grains on the acid soil was 3.1 t/ha and on the calcareous soil 2.0 t/ha. The following year the level of the yield was lower with 2.9 t/ha or 0.7 t/ha, respectively. The differences in yield between the locations with high and low pH were significant and varied between 0.1 t/ha and 3.1 t/ha. In the year 2004 and 2005, the mean protein content of the lupin assortment was always higher on the acid soils (30.8% and 30.9%) in comparison with calcareous soils (20.7% and 20.2%). High pH decreased significantly the protein content. The influence of liming of acid soils in comparison to an unlimed soil on grain yield and protein content of 10 narrow-leafed lupins was studied in a further field experiment. The pH of the unlimed soil (5.8) could be decreased with a lime-application of 3 t/ha and 6 t/ha to a pH of 6.1 or 6.4, respectively. Liming of acid soils did not effected significantly the mean values of grain yield and the protein content of investigated lupins, neither in the single year 2007 and 2008, nor in the mean of the years.


Piepho H.-P.,University of Hohenheim | Williams E.R.,Australian National University | Michel V.,Landesforschungsanstalt fur Landwirtschaft und Fischerei Mecklenburg Vorpommern
Agronomy Journal | Year: 2015

Field experiments oft en show heterogeneity and trend in both rows and columns. It is therefore useful to consider blocking in both rows and columns of the field layout of plots. We provide a brief review of row-column designs and demonstrate the particular advantage of resolvable designs, which allow the treatments to be spread out over the experimental field by latinization of rows and/or columns of plots and by evenly distributing treatments between complete replicates, thus largely avoiding a clumped placement of replications of a treatment in a limited area of the experiment. An example from a field trial with silage maize (Zea mays L.) is used to illustrate the analysis of a latinized design using mixed model procedures. © 2015 by the American Society of Agronomy 5585 Guilford Road, Madison, WI 53711 USA All rights reserved.


Piepho H.-P.,University of Hohenheim | Williams E.R.,Australian National University | Michel V.,Landesforschungsanstalt fur Landwirtschaft und Fischerei Mecklenburg Vorpommern
Journal of Agricultural, Biological, and Environmental Statistics | Year: 2015

When generating experimental designs for field trials laid out on a rectangular grid of plots, it is useful to allow for blocking in both rows and columns. When the design is nonresolvable, randomized classical row–column designs may occasionally involve clustered placement of several replications of a treatment. In our experience, this feature prevents the more frequent use of these useful designs in practice. Practitioners often prefer a more even distribution of treatment replications. In this paper we illustrate how spatial variance–covariance structures can be used to achieve a more even distribution of treatment replications across the field and how such designs compare with classical row–column designs in terms of efficiency factors. We consider both equally and unequally replicated designs, including partially replicated designs. Supplementary materials accompanying this paper appear online. © 2015 International Biometric Society


In a 18 years-old short rotation coppice (SRC) in Northern Germany the annual biomass production of Populus nigra × maximowicziiclone Max4 and P. maximowiczii × trichocarpaclone 10/85(49) were 13.3 tha-1 vs. 18.8 dtha-1 and 9.2 t ha-1 for Salix dasyclados. The vertical distribution of the plant-available phosphorus (P), potassium (K) and magnesium (Mg) reveals a changed gradient under SRC and former SRC compared to continuously annually tilled arable soils. The concentrations of P and Mg of the topsoils (0-30 cm) under SRC were significantly smaller and the concentrations of K were significantly higher than those in tilled arable soils. A tendency of acidification was found under SRC.


Bull I.,Landesforschungsanstalt fur Landwirtschaft und Fischerei Mecklenburg Vorpommern | Gienapp C.,Landesforschungsanstalt fur Landwirtschaft und Fischerei Mecklenburg Vorpommern | Wiedow D.,University of Rostock | Burgstaler J.,University of Rostock
Journal fur Kulturpflanzen | Year: 2011

A long-term cultivation trial was established to estimate the agricultural potential of the perennial legume Galega orientalis (Lam.) in Mecklenburg-Western Pomerania. Herbage productivity was monitored for four years. The average annual dry-matter yield of fodder galega was about 10 t ha-1. This legume species was found to be very resistant to frost. Drought induces reduced growth, however there is no danger of dead loss. Diseases or pests were not observed. The plants reliably accomplished seed maturity. Laboratory experiments demonstrated that galega can be ensiled successfully according to the common principles of ensiling. The fermentation batch tests demonstrated the suitability for bio-energy production. Our results indicate that galega is suitable for cultivation under the natural conditions of Mecklenburg-Western Pomerania.

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