Study of the chemical soil fertility in the biomass bank technology of Pennisetum purpureum Schum cv. CUBA CT-115 with different exploitation years
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Abstract
12 years (3.04 to 3.71%), while the P content significantly decreased (P < 0.0056) in the biomass bank of 18 years (57.84 to 39.21 ppm),but did not varied in 12 years. The soil in the biomass bank of 6 years did not showed variation of the studied chemical indicators. The results indicated that there is an increase of the soil OM as it is higher the exploitation time of the biomass bank and P content decrease. It is recommended that, under similar soil conditions, the monitoring of the soil fertility state, mainly of the P assimilable content, from 6 years of uninterrupted exploitation with this technology.
Key words: biomass bank cv. Cuba CT-115, exploitation years, chemical indicators
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