Use of a Critical Phosphorus Dilution Curve to Improve Potato Crop Nutritional Management

Plant diagnostic methods to determine P deficiencies need the definition of a critical concentration value which represents the minimum P concentration required to achieve maximum growth. The critical P concentration (Pc) has not been determined for potato. We designed a five years experiment with t...

Full description

Saved in:
Bibliographic Details
Published in:American journal of potato research 2016-08, Vol.93 (4), p.392-403
Main Authors: Zamuner, Ester C., Lloveras, Jaume, Echeverría, Hernán E.
Format: Article
Language:English
Subjects:
Agriculture
Biomedical and Life Sciences
Dry matter
Life Sciences
Nutrition assessment
Nutritional status
Plant Breeding/Biotechnology
Plant Genetics and Genomics
Plant Pathology
Plant Sciences
Potatoes
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Plant diagnostic methods to determine P deficiencies need the definition of a critical concentration value which represents the minimum P concentration required to achieve maximum growth. The critical P concentration (Pc) has not been determined for potato. We designed a five years experiment with the objective of using the relationship between P concentrations and total dry matter (TB) yield to determine and validated the Pc, expressed as a function of TB. The Pc was described by the model: 3.919*TB -0.304 where total biomass (TB) ranged from 1 to 16 Mg ha −1 . The P nutritional index (PNI), which is the ratio between the measured whole plant P concentration and Pc, was associated with the relative tuber yield measured at harvest. The results from this study support the use of PNI from 60 to 80 days after planting to determine potato crop P nutritional status.
ISSN:1099-209X
1874-9380
DOI:10.1007/s12230-016-9514-8