After studying the buildup of nutrients in plants and comparing them with the biological events
involved in the development of the plant is possible to conclude that the omission of nutrients promotes
nutritional disorders caused by both the direct effect of the nutrient as by the effect of the interaction
among them. Still, several biological processes such as increasing the concentration of CO2
inside the plant and reducing the rate of net photosynthesis and stomata conductance are affected
mainly by the omission of potassium and sulfur.
The dry matter production of roots is reduced by the omission of macronutrients, without exception,
whereas only the omission of nitrogen and calcium was able to reduce the production of dry matter
of the aerial part of the plant, these being the nutrients that most limited the total dry matter
production of the crop.
This study on the omission of macronutrients in coffee plants, although simple, in practice it is possible
to relate biological events involved with nutritional deficiency caused by nutrients poorly studied
in the literature, such as calcium, magnesium and sulfur.