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Ekelöf, Joakim (2007) Potato yield and tuber set as affected by phosphorus fertilization. Other thesis, SLU.

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Abstract

Abstract In order to minimize phosphorus (P) leaching from potato cropping systems, P recommendations based on facts regarding the influence on the potato plant is needed. A literature study and a practical experiment were conducted in order to determine potato yield and tuber set as affected by Pfertilization. The influence of soil moisture on P availability and the effects of foliar‐ P application were also investigated. Five different nutrient P treatments ranging from 0 to 0.3 g/pot were evaluated. Each nutrient P treatment was divided into 8 doses and applied weekly to plantlets grown in 50% pumice stone‐ 50% peat. Two different soil moisture levels were tested, "moist treatment" ranging from 0.35 to 0.45 g cm‐3 and "dry treatment" ranging from 0.25 to 0.35 g cm‐3. Foliar‐ P applications were applied 16 and 26 days after emergence (d.a.e.) in line with common practice recommendations. Nutrient P treatments significantly effected the total fresh weight of tubers, shoots and tuber number. The moist treatment gave significant higher yield of both tubers and tuber number compared to the dry treatment which could beexplained by an increased P uptake. The foliar‐ P application resulted in higher tuber yield only in plants with low P status within the moist treatment; indicating that plant water and P status might be important for P uptake through leaves. The foliar‐ P applications however, gave no significant effects on tuber number.

Item Type: Thesis (Other)
Keywords: Fertilizer, Irrigation, Phosphorus, phosphate, foliar, application
Subject (faculty): Faculty of Veterinary Medicine and Animal Science > Dept. of Horticulture
Divisions: SLU > Faculty of Landscape Planning, Horticulture and Agricultural Science
Depositing User: Joakim Evert Ekelöf
Date Deposited: 14 Aug 2007
Last Modified: 18 Aug 2015 09:53
URI: http://ex-epsilon.slu.se/id/eprint/1853

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