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Predicción de pérdidas de agua y lixiviación de nitratos en suelos ferralíticos rojos cultivados bajo riego en el sur de La Habana

Abstract : The main objective of this work is to define relations to predict water and nitrate leaches under crop radical zone in Ferrasols of south of Havana. The work was done in two parts. First it was used a mechanistic model MACRO to simulate hydric balances in soil without crop with a wide range of water incomes to profile. As a result it was fitted a relation to predict water loses under crop radical zone as a function of precedent water content and daily total water incomes. In the second part of the work it was used the same range of incomes of water combined with four different quantities of applied nitrogen fertilizer. As a result it was defined a relation to estimate nitrate leaches at the bottom of soil profile as a function of total applied water and nitrogen fertilizer. The results showed that the loses of water and nitrate can be considerable in this soils in function of precedent water content and total incomes of water and nitrogen fertilizer due mainly to the behavior of hydraulic conductivity on this soils. The fitted relations can be used with a propped precision to predict the losses of water and nitrate leaches under studied soils for the conditions of water and nitrogen fertilization management of the majority of agricultural crops in the studied zone.
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  • PRODINRA : 15583

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Teresa Lopez, Greco Cid, Felicita Gonzales, Graciela Duenas, Harry Ozier Lafontaine, et al.. Predicción de pérdidas de agua y lixiviación de nitratos en suelos ferralíticos rojos cultivados bajo riego en el sur de La Habana. Revista Ciencias Técnicas Agropecuarias, 2006, 15 (3), pp.1-5. ⟨hal-02656200⟩

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