Articles

DIFFERENTIAL EFFECTS OF N, K, AND CA ON GROWTH OF TOMATO PLANTS DURING NUTRIENT STARVATION AND RECOVERY

Article number
614_79
Pages
535 – 540
Language
English
Abstract
The differential effects of N, K and Ca on fresh weight growth of tomato plants were analysed.
Plants were subjected to 1, 3 or 7 days of N, K or Ca starvation followed by a recovery period of 7 days with full strength nutrient solution.
Withdrawing N, K or Ca from the nutrient solution resulted, within one day, in a dramatic decrease in fresh weight growth rate.
When the starvation period was continued these reductions became more marked.
After 7 days of Ca-starvation cumulative plant fresh weight was reduced by 74% compared to control plants.
Similar starvation periods for N and K led to reductions of 62% and 43%, respectively.
After 1 day of N, K or Ca starvation followed by 7 days of recovery cumulative plant fresh weight was not significantly different from control plants.
For all nutrients, after 7 days of starvation plants were unable to recover control values during the subsequent 7 day recovery period.
Plant nutrient composition was affected and after 7 days of recovery Ca-starved plants had the greatest decrease.

Publication
Authors
F.M. Del Amor, L.F.M. Marcelis, V. Martinez
Keywords
Lycopersicon esculentum, deficiency, recovery, nitrogen, calcium, and potassium
Full text
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