Influence of Biochar Mixed into Peat Substrate on Lettuce Growth and Nutrient Supply

The use of peat in traditional cultivation systems and commercial nurseries is an environmental problem. In this work, we evaluated the partial replacement with different amounts biochar sourced from vineyard pruning as plant growing substrates. We studied its effect on growth lettuce plants under greenhouse semi-hydroponic conditions. Substrate mixtures contained 30% (v/v) vermiculite 70% biochar:peat treatments follows: 0:70 (B0), 15:55 (B15), 30:40 (B30), 50:20 (B50), 70:0 (B70). Higher increased pH electrical conductivity substrate, negatively affecting germination (especially B70). substitution by (B30) delayed seed but improved nitrogen efficiency (NUE), shoots containing higher levels organic nitrate. Moreover, it water holding capacity (WHC) led to efficient nutrients. Our study demonstrates that can successfully replace reduce N fertilizer consumption. This has potential promote more sustainable farming positive impacts both environment.