Urea addition in the corn stover silage successfully compensated nitrogen deficiency while molasses not only neutralized and stabilized the effect of urea but also increased the basal energy of this diet.
For example, we can see the difference between water stress and nitrogen deficiency stress in a crop, detect hail and frost damage, and learn the difference between a diseased outbreak and pest infestation.
When the plant has nitrogen deficiency some symptoms are visible, such as the bleaching of the new leaves and the occurrence of chlorosis in the old leaves that become yellowish, and that will entail in a plant more susceptible to diseases and losses in productivity.
Supplemental UV-B radiation under high nitrogen decreased the biomass of plants with no effect when nitrogen stress was imposed, suggesting secondary protection against UV-B damage under nitrogen deficiency (HUNT & MCNEIL, 1998).
Asparagine synthetase gene expression is dependent on nitrogen available and was reduced when nitrogen was limited [32, 33], and we also found that HvASN1 was repressed only in shoots, indicating that the primary effects of nitrogen deficiency might appear initially in the shoots.