Browsing by Autor "René Cupull Santana"

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    Phosphorus sources (P) plus filter pie with or without azotofos on the available P in the soil
    (2014) Maikel Abreu Jiménez; Enrique Parets Selva; Leónides Castellanos González; Leandro Rosatto Moda; Renato de Mello Prado; Aida Margarita Romero Jiménez; René Cupull Santana
    The objective of the investigation was to evaluate the effect of four phosphorus sources plus filter
\npie with or without the biofertilizer Azotofos on the available phosphorus in the soil at different moments after
\nthe treatment. An experiment in factorial design 4(2)+1 was established, being the four phosphorus sources:
\nrock phosphate, natural phosphate, triple phosphate and Cuban phosphoric rock; two sources of the organic
\ncompound to base filter cake enriched with Azotofos microorganisms, only filter cake (without enrichment) and
\na control treatment (without filter pie, neither Azotofos), with three repetitions. The evaluations of the tenor of
\navailable P (Bray-2) were carried out at the 30, 60, 90, 120 and 150 days after the installation of the experiment.
\nThe tenor of P (Bray-2) was influenced by the sources of P and the enrichment with biofertilizantes (factorial)
\nincreasing the tenor of available P in front of the control. The triple superphosphate promoted the higher tenors
\nin P in the soil at 60 and 90 days after its application, independently of the presence or not of the organic
\ncompound enriched with P solubilizing microorganisms, although this effect didn’t stay stable at the time.
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    Prevention of the bad dry of the malanga by treatment of natural, biological origin
    (2014) Michel Chamizo Nicao; Daymí Isabel Carrazana García; Ernesto Espinosa Cuéllar; Annarella Chea González; Mayra Acosta-Suárez; René Cupull Santana
    One of the most important causes of the decrease of yields in taro crops (Xanthosoma spp.) isthe roots rot caused by soil fungi (Bad dry) which it’s propagated by the agamic seed used as propagules. One of the most important measures to prevent it is the use of “in vitro” plants free of fungi. In this research was
\nstudied the incorporation of several natural and biological products in the plots employed to acclimatize the “invitro” plants. Were evaluated: Trichoderma harzianum, Chitosan, and lobster shell (
\nPanulirus argus (Latreille))and as control Mancozeb. The taro cultivars employed were Blanca INIVIT and Blanca Venegas, considerate as intermediated and susceptible respectively. Each plot was inoculated with propagules of Sclerotium rolsfii
\n(Sacc.). In order to infer the action mechanism was conducted susceptible tests under “in vitro” conditions. The
\nresults showed that the most susceptible cultivar was Blanca Venegas. All treatments decrease the incidence
\nof dry rot, among these. T. harzianum
\n produced the highest effect, antagonist capacity and antagonist effect type. The Chitosan and the lobster shell do not showed antifungal direct effect and probably act for stimulation
\nof the protein synthesis related with the pathogenesis or structural barrier of defense in natural conditions.