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Tomato Nitrogen Uptake and Partitioning
Seasonal N Uptake
Nitrogen uptake curve of processing tomatoes grown in research plots at UC Davis and in commercial fields. Uptake was determined by harvesting the aboveground biomass at different times during the season . Early in the season, N uptake was low. The period of low uptake is shorter with transplants compared to seeds. The N uptake remained relatively high until harvest.
Approximately 70% of the total aboveground N was in tomatoes, with the rest being in the vines .
Nitrogen Removed at Harvest
|Location||Years||Removal (lbs N/ton fresh weight)||Source|
|Central Valley, CA||2007-2008||3.00||2.6-3.3|||
|Central Valley, CA||2015||3.12||2.8-3.6|||
|Central Valley, CA||2013||2.52||1.9-3.1|||
- Aegerter, B., 2015. Potential for improved fertigation efficiency via field-based sensing devices. Report submitted to the California Tomato Research Institute. Complemented with unpublished data.
- Geisseler, D., 2016. Nitrogen concentrations in harvested plant parts -A literature overview. Report to the Kings River Watershed Coalition.
- Hartz, T.K., Bottoms, T.G., 2009. Nitrogen Requirements of Drip-irrigated Processing Tomatoes. HortScience 44, 1988-1993.
- Lazcano, C., Wade, J., Horwath, W.R., Burger, M., 2015. Soil sampling protocol reliably estimates preplant NO3- in SDI tomatoes. California Agriculture 69, 222-229.