Biomass production of duckweed (Lemna minor) fertilized with ovine manure

Abstract

In January 2003, in the Animal Production Research Unit, Lara, Venezuela, duckweed (Lemna minor) was cultured in micro lagoons to determine biomass production. Three experiments (E) were carried out with a totally randomized design: E1 (T0 = 30 g of duckweed, T1 = 30 g of duckweed and 32 g of fertilizer), E2 (T0 = 5 g of duckweed, T1 = 5 g of duckweed and 32 g of fertilizer), with 25 repetitions per treatments; and E3 (T0 = 5 g of duckweed, T1 = 5 g of duckweed and 20 g of fertilizer, T2 = 5 g of duckweed and 30 g of fertilizer, and T3 = 5 g of duckweed and 40 g of fertilizer), with 15 repetitions per treatment. The duckweed gave higher yields when fertilized, and the yields depended on the quantities of vegetative material and fertilizer added to the micro lagoon.