Projects per year
Abstract
The relationships between potential laboratory indices for plant-available nitrogen (N) and the plant N uptake in a pot experiment with ryegrass were assessed for 13 mineral soils and 2 peat soils. The methods included aerobic soil incubation, soil incubation in a bioreactor, hot potassium chloride (KCl)-extractable mineral N, 0.01 M calcium chloride (CaCl2)-extractable N, and N loss at heating. The indices for total plant-available N accounted for 63-93% of the variance in N uptake in a statistical analysis with all soils (n = 15) and 27-89% for the mineral soils (n = 13). Most indices were not a direct quantitative measure of the plant N uptake. The N mineralization indices accounted for 57-86% of the variance in N mineralization for all soils and 5-50% for the mineral soils. Hot KCl-extractable mineral N and 0.01 M CaCl2-extractable N were the most promising rapid indices for plant-available N.
Original language | English |
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Pages (from-to) | 52-71 |
Journal | Communications in Soil Science and Plant Analysis |
Volume | 41 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2010 |
Keywords
- potentially mineralizable nitrogen
- organic-matter
- n-mineralization
- drying temperature
- grassland soils
- extraction
- fractions
- electroultrafiltration
- prediction
- quality
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Commissie deskundigen meststoffenwet (BO-43-101-002, BO-43-012.02-003, BO-20-004-013)
1/01/13 → 31/12/22
Project: EZproject
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CDM en beleidsadvisering nav Evaluatie Meststoffenwet (BO-12.12-002-003)
1/01/12 → 31/12/12
Project: EZproject
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