Andert, Sabine

Gerowitt, Bärbel

Hüttel, Silke

Winklhofer, Paul

English

JKI Open Journal Systems (Julius Kühn-Institut)

11th Young Scientists Meeting 2018, Braunschweig, Germany, November 14-16 Winklhofer et al. Identifying and analyzing patterns of Phos-phorus fertilization   Paul Winklhofer1, Sabine Andert1,  Silke Hüttel 2 and Bärbel Gerowitt 1 1 University of Rostock, Department of Crop Health, Rostock 2 University of Bonn, Institute of Food and Resource Economics, Bonn  E-mail of corresponding author: paul.winklhofer@uni-rostock.dePhosphorus (P) is an essential nutrient in agricultural crop production. However, in aquatic ecosystems P can lead to envi-ronmental damages trough eutrophica-tion. Beside local surpluses of P, global recourses of rock phosphate are limited. Although agriculture is the main con-sumer of P, information about on-farm fertilisation use is scarce.    Within the joint project InnoSoilPhos1, we will examine fertilisation strategies of approximately 50 farms in five regions in northern Germany. The regions corre-spond to administrative districts located on gradients of climatic, soil and struc-tural production conditions. We collect fertilisation and other crop production data at the field-scale for the period 2010-2018. In addition, general produc-tion features of these farms are surveyed at the farm-scale.  The first objective of this work is to char-acterise how farms fertilize regarding1 Website: www.innosoilphos.de quantities, types, allocation to crops and frequencies. We are interested in whether and how strategies can be clas-sified depending on region, site and other farm(er) characteristics. We target at in-vestigating fertilisation patterns by ex-plorative methods such as cluster analy-sis, ANOVA but also mixed models. Sec-ond, our objective is to analyse potential relationships between P fertilisation and other cultivation factors, like crop protec-tion or crop rotation. We plant to apply multivariate methods here.  The results will help to identify and un-derstand factors influencing fertilisation strategies at the farm level and thereby will help to find reduction potentials. The authors gratefully acknowledge the German Federal Ministry of Education and Research (BMBF) for funding the BonaRes project InnoSoilPhos (No. 031B0509). 72 Berichte aus dem Julius Kühn-Institut 200

Identifying and analyzing patterns of Phosphorus fertilization

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Identifying and analyzing patterns of Phosphorus fertilization

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