fertilized with shredded bines was only slightly higher than that of the controls in 2019 and 2020, which indicates a low short-term N-fertilization effect (Figure 4.11). A conclusion regarding the long-term N-fertilization effect of shredded bines, however, will only be possible after the results of the next test years are in.
Figure 4.11: Nitrogen detected at harvest time and divided into cones and residual plant matter in kg/ha relative to either mineral or organic fertilization, for the year 2020, for Herkules, at an easy growing location, using three fertilization levels: 90 N = 90 kg N mineral (control), 90 N + Shredded Bines = 90 kg N mineral + 100 kg N organic (bines), and 180 N = 180 kg N mineral
4.5
Investigation of the roots and nutrient supply in the soil profile as a function of irrigation and the position of the drip hose
Team:
I. Riedl (Bachelor Thesis) F. Weiß (Bachelor Thesis) J. Stampfl
Collaboration:
Dr. Sabine von Tucher, (Chair of Plant Nutrition, Weihenstephan, Munich Technical University) Lehrstuhl für Pflanzenernährung, Technische Universität München
Duration:
May 2019 to November 2019
Background and objectives Between 2017 and 2019, the Bavarian State Institute for Agriculture was the site for extensive N-fertilization tests as part of a project entitled "Improving nutrient efficiency in hops through fertilization systems with fertigation." Among other tasks, the effects of fertilization, irrigation, and the position of drip hoses were closely examined. Two drip hose positions, one on the furrow (AB) and below ground next to it (NB), are associated with different effectiveness with regard to biomass and yield generation. This led to studies of the soil profiles in terms of their root distribution, macronutrient content, and other soil properties in the irrigated area, relative to the different irrigation methods. 37
