ARNAUD, E. R.; http://lattes.cnpq.br/7719839349755773; ARNAUD, Edinaldo da Rocha.
Résumé:
- The use of spontaneous species of the caatinga represents an option of organic
fertilizer for farmers who labor in the production of vegetables, been the silk flower, species
of large occurrence in the study area, and it is found in various locations the northeast region
of the country in different soil conditions. An experiment was conducted at the Experimental
Farm Rafael Fernandes, located in Alagoinha district, a rural area of Mossoró-RN, from
October 2010 to February 2011, in order to evaluate the agricultural economic viability of the
application of the silk flower (Calotropis procera) in beet cultivation in monocrop. The
experimental design was a randomized complete block with treatments arranged in a factorial
5 x 4 with three replications. The treatments were a combination of four amounts of silk
flower (0, 0.7, 1.4, 2.1 and 2.8 kg m-2 site on a dry basis), with four periods of incorporation
(0 , 14, 28 and 42 days before planting). The planted cultivar of beet was the Early Wonder.
The characteristics evaluated were: plant height, fresh weight yields and shoot dry,
commercial root yield and dry matter yield of roots. They were also used some economic
indicators such as gross income and cost of production, net income, rate of return and
profitability index, which were used to verify the economic viability. There was no interaction
between treatments. The best beet production performance was observed in the amount 2.3 kg
m-2 site of silk flower incorporated into the soil, with an average value of 2.44 kg m-2 beet
site, with net profitability 4040.00 £, rate of return of around £ 2.65 and 62.3% profitability
index. For periods of incorporation, 0 days was what promoted the highest commercial yields
of beet with a mean value of 2.2 kg m-2 beet site, with net profit of R $ 3,500.00, rate of
return order 2.43 R $ and 58.9% profitability index. The cultivation of beet fertilized with
silk-flower constitutes a viable alternative to the producer.