R325 - Effect of Different Rate of Azotobacter ... - Agrisciences.com

If a cytokinin is applied directly to the lateral yolk, inhibited by the active tip of the stem, the growth of the lateral
bud is stimulated. It is possible that cytokinins originate in the roots and rise in the organic solutes of the xylem, by
their presence it is deduced that there is a firm correlation between root growth and the upper portion parts of the
plants. An over abundance of roots causes the slow down in their growth, since this causes a reduction in the
concentration of the cytokinins in the organic solutes (WEIER, E. and STOCKING, R. 1980).
Foliar absorption is based on the process of diffusion of liquids through a semi-permeable membrane and is
selective in the sense that dissolved elements move to a less concentrated solution from a higher concentration,
(JUÁREZ, G. 1956).
It is believed that the entrance into the plant of nutrients applied to the foliage is through the discontinuities of the
epidermal. In the parallel layers of the epidermal cells of the leaves of many plants, there are pectin like substances
embedded in the cutinizadas area; these pectin like substances extend vertically starting from the surface going
toward the interior of the leaf constituting a continuous passage to the walls of the vascular extensions and directly
toward the vascular system of the leaf, and roots (CROCOMO, O and OTHERS, 1965).
Works exist that prove that the effectiveness of foliar absorption is closely related to the structure of the leaf,
species of the plant, leaves of the same plant and several parts of the same leaf can have an effect (ZIRENA, D.
1977).
In an experiment on onion production using Agrispon and Azotobacter, it was shown: That the treatment with
Azotobacter had a yield of 8,383 kg/ha, Agrispon 7,177 kg/ha and the control 8,115 kg/ha. In spite of this neither
the Azotobacter nor Agrispon showed statistical significance. Concluding that it is more advisable to use
Azotobacter spp. before Agrispon application, to obtain the best yields and also to be more economical
(CADENILLAS, A. 1985).
Building soil not only depends on factors that exists in smaller quantity, all of the factors need to be increased
proportionally when increasing any one factors until arriving at a maximum production; arriving at this maximum, a
new increase of a single factor without increasing the other factors causes a decrease in the yield. This is known as
the Law of Effectiveness of the Factors of Growth” (SELKE, W. 1968).
Chapter III
MATERIALS AND METHODS
1. Characteristic of the Experimental Field.
1.1. Location - This experiment was carried out in the Agricultural Experimental Center “La Victoria", at the
National University of Cajamarca, located 2,450 m.s.n.m., latitude 0:07 (11 ' S: longitude 78 O 20' W: with
a dry temperate climate whose climatic characteristics (Averaged 1973-1984) are:
Maximum temperature: 21.4 O C, minimum temperature: 6.4 O C, median temperature: 13.3 O C, total
precipitation: 480.9 mm.
1.2. Climatic conditions during the development of the cultivation.
4