A Comparison of the Phosphorus Nutrition Index Versus the Petiole Analysis as Tools to Assess the Phosphorus Nutritional Status of Potato

A Comparison of the Phosphorus Nutrition Index Versus the Petiole Analysis as Tools to Assess the Phosphorus Nutritional Status of Potato

The objectives of our study were to (i) evaluate the association between the phosphorus (P) nutrition index (PNI) and total or soluble P in petioles (Ppe T and Ppe S , respectively) throughout potato’s ( Solanum tuberosum L.) growing season and (ii) evaluate the use of Ppe T and Ppe S as predictors...

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Bibliographic Details
Published in:Journal of soil science and plant nutrition Vol. 23; no. 3; pp. 3612 - 3622
Main Authors: Reussi Calvo, Nahuel Ignacio, Lattour, Kevin, Giletto, Claudia M., Wyngaard, Nicolás, Zamuner, Ester
Format: Journal Article
Language:English
Published: Cham Springer International Publishing 01-09-2023
Springer Nature B.V
Subjects:
Agricultural production
Agriculture
Biomedical and Life Sciences
Crop yield
Ecology
Environment
Growing season
Harvesting
Irrigation
Life Sciences
Nitrates
Nutrition
Nutrition assessment
Nutritional status
Original Paper
Phosphorus
Plant Sciences
Potatoes
Rain
Seasons
Soil Science & Conservation
Soil testing
Solanum tuberosum
Vegetables
Phosphorus
Diagnosis
Nutrition index
Petiole
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Summary:The objectives of our study were to (i) evaluate the association between the phosphorus (P) nutrition index (PNI) and total or soluble P in petioles (Ppe T and Ppe S , respectively) throughout potato’s ( Solanum tuberosum L.) growing season and (ii) evaluate the use of Ppe T and Ppe S as predictors of the P nutritional status and tuber yield. Five potato (cv. innovator) field trials were carried out during two growing seasons, where four different P rates were evaluated. Whole plants were harvested, and the P content was determined and used to calculate the PNI. Also, petioles were harvested to determine Ppe T and Ppe S . At crop maturity, total and relative yield (RY) were determined. From all evaluated dates, Ppe T and Ppe S presented a stronger capacity to predict RY at 70 days after planting ( r  = 0.65 and 0.66, respectively), when Ppe T and Ppe S presented a 2.96 and 1.48 g kg −1 threshold below which RY was negatively affected, respectively. The PNI was mostly better associated with Ppe T than with Ppe S . The PNI presented a moderate capacity to predict the potato tuber RY which was stable throughout the growing season and presented an average critical threshold of 0.96. Depending on the sampling moment, all three evaluated indexes (PNI, Ppe T , and Ppe S ) resulted to be suitable in-season plant analysis to assess the P nutritional status of potatoes. However, based on the simplicity of the quantification and the observed predictive capacity, the methodologies based on petiole analysis are advantageous as compared with PNI.
ISSN:0718-9508
0718-9516
DOI:10.1007/s42729-023-01280-w