The present study aimed to evaluate the chemical and physical/hydraulic properties of sugarcane bagasse and filter cake substrates in different compositions and proportions with sand and subsoil, as well as their use in the development of pre-sprouted seedlings (PSS) of sugarcane. The treatments were set up in a 5 × 5 factorial completely randomized design, with five proportions [(0, 0.25, 0.5, 0.75 and 1.00, on a volumetric basis (v/v)] of bagasse or cake in five compositions with sand or subsoil [Bagasse (Sand), Bagasse (Subsoil), Bagasse (Cake), Cake (Subsoil) and Cake (Sand)], totaling 25 treatments with three replications. As a reference to the formulated substrates, we used the commercial substrate Trimix^®. The chemical (pH and electrical conductivity) and physical (density, total porosity, aeration space, water holding capacity and particle size) properties were evaluated for the substrate characterization and the agronomic and productive variables for the characterization of PSS growth. The by-products, namely filter cake and sugarcane bagasse, recommended in the production of substrates can be used in the production of pre-sprouted seedlings of sugarcane from individualized buds. Equivalent volumetric proportions of cake and bagasse at 50% of each promoted growth and biomass production of pre-sprouted seedlings of sugarcane.

中文翻译：

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以甘蔗业副产品为底料的甘蔗苗苗

本研究旨在评估不同成分和比例的甘蔗渣和滤饼基质与沙子和地下土壤的化学和物理/液压特性，以及它们在甘蔗预发芽幼苗（PSS）发育中的用途。处理方法采用5×5阶乘完全随机设计进行设置，将五种比例的蔗渣或蛋糕[[0，0.25，0.5，0.75和1.00，基于体积（v / v）]]在五种含沙或底土[蔗渣（砂），甘蔗渣（地基），甘蔗渣（蛋糕），蛋糕（地基）和蛋糕（沙）]，共计25个处理重复三次。至于配制底物的参考，我们使用了商业基底混合气^®。评价化学特性（pH和电导率）和物理特性（密度，总孔隙率，曝气空间，持水量和粒径），以表征基质，并表征农艺和生产变量，以表征PSS的生长。在底物生产中建议使用的副产品，即滤饼和甘蔗渣，可用于从个性化芽中生产甘蔗的预萌芽幼苗。饼和甘蔗渣各占50％的当量体积比可促进甘蔗预发芽幼苗的生长和生物量生产。