基质添加生物炭对辣椒育苗效果的影响

Effect of Substrate Addition of Biochar on Seedling Growth of Pepper

为明确生物炭对基质理化性质的影响及辣椒育苗效应,本试验设置0、0.1%、0.5%、0.9%、1.3%、1.7%、2.1%的生物炭施用量(W∶W,%),以传统的田园土草炭蛭石混合基质做对照,进行温室基质育苗试验。结果表明,生物炭添加可增大基质孔隙度、EC值,降低基质水气比,优化基质的遴选。随生物炭增加,辣椒幼苗长势呈现先升高后下降趋势,且各处理均优于对照。生物炭添加量为0.9%时辣椒长势最好,地上部干重、叶绿素含量、壮苗指数均达到最大值(1.53 g、2.59 g、0.418),促进幼苗生长。

In order to clarify the effect of biochar on the physical and chemical properties of the substrate and the efficiency of pepper seedlings, this experiment sets 0, 0.1%, 0.5%, 0.9%, 1.3%, 1.7%, 2.1% biochar application rate(W∶W, %). Using traditional vermiculite mixed substrate of pastoral soil peat as a contrast, the seedling breeding experiment of greenhouse substrate was carried out. The results show that the addition of biochar can increase the porosity and EC value of the matrix, reduce the water-gas ratio of the matrix, and optimize the selection of the matrix.With the increase of biochar, the growth of pepper seedlings increased at first and then decreased, and all treatments were better than the control. When the biochar supplemental level was 0.9%, the pepper had the best growth, and the shoot dry weight, chlorophyll content and strong seedling index all reached the maximum values(1.53 g, 2.59 g,0.418), which promoted the seedling growth.