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Sludge as an initial nutrient driver for yield improvement in the poor soils of northern Namibia
Autor: Ebrahimi, Ehsan; Zinkernagel, Jana
In:
South African Journal of Plant and Soil
Autor: Ebrahimi, Ehsan; Zinkernagel, Jana
Bandangabe: 39
Auflage: 5
Verlag: Taylor & Francis Group
ISBN: 0257-1862
DOI: 10.1080/02571862.2022.2119291
Seite: 370 - 374
Jahr: 2022
Einordung:
Institut: Professur Pflanzenbau
Abstract:
The northern part of Namibia suffers from drought and low-quality soil. The soil needs a boost of nutrients, and the water must be used in a frugal manner. Thereby, the objective of this research was to investigate the effect of sludge and treated wastewater as initial nutrient drivers in sandy loam soil by examining the dry biomass (DM), the nutrient uptake, and the heavy metal accumulation in the organs of sorghum. For this reason, sludge, chemical fertilizer, and a mixture of both were applied to a sorghum field. As a second factor, water of two different qualities was used: (a) treated wastewater (TWW), and (b) tap water. The treatment with mixed-fertilizer produced 16% more DM compared to the treatment with chemical fertilizer when irrigated with tap water. The use of TWW enhanced phosphorus uptake in the treatment with chemical fertilizer but did not increase the DM. This study suggests that sludge can be applied as an initial nutrient driver for poor soil with low organic matter and that TWW can also be an important complementary water resource for irrigation in areas affected by drought. Ansprechpartner Weitere Information im WWW
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Letzte Änderung des Eintrages:
24.02.2023
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