In:
Journal of Plant Nutrition and Soil Science, Wiley, Vol. 180, No. 5 ( 2017-10), p. 594-601
Kurzfassung:
The plant‐availability of phosphorus (P) in fertilizers and soil can strongly influence the yield of agricultural crops. However, there are no methods to efficiently and satisfactorily analyze the plant‐availability of P in sewage sludge‐based P fertilizers except by undertaking time‐consuming and complex pot or field experiments. We employed the diffusive gradients in thin films (DGT) technique to quantify the plant P availability of various types of P fertilizers with a novel focus on sewage sludge‐based P fertilizers. Mixtures of fertilizer and soil were incubated for 3 weeks at 60% water holding capacity. DGT devices were deployed at the beginning of the incubation and again after 1, 2, and 3 weeks. Two weeks of incubation were sufficient for the formation of plant‐available P in the fertilizer/soil mixtures. In a pot experiment, the DGT technique predicted maize ( Zea mays L.) biomass yield and P uptake significantly more accurately than standard chemical extraction tests for P fertilizers ( e.g ., water, citric acid, and neutral ammonium citrate). Therefore, the DGT technique can be recommended as a reliable and robust method to screen the performance of different types of sewage sludge‐based P fertilizers for maize cultivation minimizing the need for time‐consuming and costly pot or field experiments.
Materialart:
Online-Ressource
ISSN:
1436-8730
,
1522-2624
DOI:
10.1002/jpln.201600531
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2017
ZDB Id:
1481142-X
ZDB Id:
1470765-2
ZDB Id:
200063-5
SSG:
12
SSG:
13
