Resumo

TRUJILLO GALINDO, MARÍA; MENDEZ NATERA, JESÚS; HOSSNE GARCIA, AMÉRICO  e  PARRA DIAZ, FRANCISCO. EFFECT OF MOISTURE CONTENT AND LEVEL OF COMPACTION OF  AN ULTISOL SOIL ON SOME BROMATOLOGIC CHARACTERISTICS OF CULTIVATION OF SOYBEAN  (Glycine max L. Merrill cv San Baiba). Saber [online]. 2016, vol.28, n.4, pp.706-712. ISSN 1315-0162.

Since  problems  of  soil  compaction  as  a  limiting  factor  in  crop  development  have  been  traditionally  studied independently  of  the  moisture  factor,  an  experiment  was  performed  to  determine  the  behavior  of  Soybean (Glycine max L. Merrill cv San Baiba) with respect to moisture and compaction of an Ultisol soil from a savannah in  Monagas  state,  Venezuela.  A    randomized  block  design  with  factorial  arrangement  was  used  where  the interaction of four levels of compaction was studied through different number of strokes per layer (0, 12, 24, 36) and four levels of moisture through the variation of the irrigation frequencies (every day, every two days, every three  days  and  every  four  days).  It  was  evidenced  that  the  fresh  leaf  and  branches  masses  and  leaf  area  were affected  by  the  frequency  of  watering  with  the  following  regression  equations,  respectively:  Y  =  1691.364 905.035 + x - 390.280 x2 with R2 = 98.12%, Y = 16.770 + 23.350 x - 5.250 x2 with R2 = 98.40% and Y = 17.535+ 7.576 x - 2.08 x2 with R2 = 97.61%. In the other hand, the dry mass of branches was affected by the interaction. The variables dry foliar mass, percentage of ash, ether extract, crude fiber, organic matter, dry matter and crude protein showed no significant differences for any of the factors and their interaction.

Palavras-chave : Bromatology; compaction; soy.

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