Effect of bioactive products combined with the microbial biopreparate Azotofos on the growth of Paspalum salam

Abstract

In order to evaluate the effect of bioactive products and their combination with Azotofos on the growth of Paspalum
salam (Paspalum vaginatum Sw. cv. Salam), two trials were conducted. A randomized block design was used with three
repetitions and the bioactive products Pectimorf® (based on pectins) and BIOBRAS-16® (based on brassinosteroids),
and their combination with the microbial biopreparate Azotofos, which consists in a mixture on humic support of
Pseudomonas sp. and Azotobacter chroococcum. In the first experiment six treatments were established from the
bioactive products, the microbial biopreparate and their combination. The second trial consisted in testing different
imbibition times of the propagules in Pectimorf®. A significant superiority was found 30 days after planting in the percentage of rooted cuttings in the treatments with BIOBRAS-16® and Pectimorf®, higher than 89%; while the control did not exceed 69%. The combination of Pectimorf® with Azotofos increased the percentage of rooted cuttings.
Regarding the total cumulative biomass, the best result was obtained in the treatment with Pectimorf (0,84 g/individual).
As to the imbibition time, the treatments hydrated control and non-hydrated one did not exceed 69% of rooted cuttings; significantly different from the imbibition time 60 min, which reached 100%. Pectimorf ® was concluded to be the best alternative to stimulate the growth of P. vaginatum cv. Salam. The results also indicated that the cuttings must remain imbibed in Pectimorf® for 60 minutes.