Cotton Nitrogen Uptake and Partitioning

Crops:

Almonds

Barley

Broccoli

Cauliflower

Citrus

Corn for Grain

Corn for Silage

Cotton

Grapevines

Lettuce

Pistachio

Rice

Strawberries

Tomatoes

Walnut

Wheat

Seasonal N Uptake

Nitrogen uptake of cotton grown in Fresno and Kings County was determined by harvesting the aboveground biomass at different times during cotton development.
Cotton plants took up little N until they reached the early square stage. Most N was taken up between the early square and peak bloom stage (Fritschi et al., 2004).

Nitrogen Partitioning

Measured immediately before defoliation, more than half of the aboveground N of Accala cotton was in the seeds. Nitrogen in the fiber and burs accounted for about 15% (Fritschi et al., 2004).

Nitrogen Removed at Harvest

Cotton yield and N removed at harvest. The N application rate was 150 lbs/acre.

Links

Cotton Fertilization Guidelines

References

Fritschi, F.B., Roberts, B.A., Travis, R.L., Rains, D.W., Hutmacher, R.B., 2003. Response of irrigated Acala and Pima cotton to nitrogen fertilization: growth, dry matter partitioning, and yield. Agronomy Journal 95, 133–146.

Fritschi, F.B., Roberts, B.A., Travis, R.L., Rains, D.W., Hutmacher, R.B., 2004. Seasonal nitrogen concentration, uptake, and partitioning pattern of irrigated Acala and Pima cotton as influenced by nitrogen fertility level. Crop Science 44, 516–527.