Effect of irrigation depths and paclobutrazol doses in soil microfauna cultivated with mango crop cv. Haden in Minas Gerais North
2011
Reis, João Batista Ribeiro da Silva | Jesus, Alniusa Maria de | Dias, Mário Sérgio Carvalho | Leal, Daniel Philipe Veloso
This study aims to evaluate different irrigation depth and doses of a growth regulator on soil microbial population in mango crop cv. Haden in northern Minas Gerais. The experiment was carried out in a randomized design consisting of 16 treatments with three replications, with four irrigation depth and four doses of paclobutrazol (PBZ). The irrigation system used was microsprinkler, consisting of a lateral line for each row of plants and two microsprinklers by plant. With respect to nematodes analyzes, each soil sample (250 cm3) and roots (20g) was analyzed separately. Later, it was realized identification of nematodes and determination of the population levels. The survey of fungi, bacteria and actinomycetes were sampled at 0-30 cm depth for each treatment. It was concluded that should be to realize a permanent monitoring of the nematodes population in mango producing areas of northern Minas Gerais; it is suggested to use the 100% irrigation depth for an effective control of nematodes Criconemella sp. and Xiphinema sp. but also for bacteria population, where it is recommended to use a dose of 2.0 g / m.l. PBZ; recommended to use a dose of 1.5 g / m.l. PBZ to control nematodes majority and the dose of 1.0 g / m.l. to control Criconemella sp; for fungi and actinomycetes, the treatments did not show satisfactory average values, however, data make clear the necessity of additional studies in the area concerned.
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