用于无土栽培的基质种类良多。可按照当地基质来历，随机应变地加以选择，尽可能选用原料丰硕易得、价钱低廉、理化性状好的材料做为无土栽培的基质。
There are many kinds of substrates for soilless cultivation. It can be selected according to the origin of the local substrate, and the materials with rich and easy raw materials, low price and good physical and chemical properties can be selected as the substrate for soilless cultivation.
无土栽培对基质的要求是：
The requirements of soilless culture for substrate are:
1．具有必定巨细的固形物质。这会影响基质是不是具有杰出的物理性状。基质颗粒巨细会影响容量。孔隙度、空气和水的含量。按着粒径巨细可分为五级、即：1毫米；1－5毫米；5－10毫米；10－20毫米；20－50毫米。可以按照栽培作物种类、根系发展特点、当地资状态加以选择。
1. Solid substance with certain size. This will affect whether the matrix has outstanding physical properties. The size of matrix particles will affect the capacity. Porosity, air and water content. According to the size of the particle, it can be divided into five levels, namely: 1mm; 1-5mm; 5-10mm; 10-20 mm; 20-50 mm. It can be selected according to the types of cultivated crops, root development characteristics and local capital status.
2．具有杰出的物理性质。基质必需松散，保水阳雕刻 手套生产设备 果树反光膜 北京纯水设备 保定网站制作 排水槽模具保肥又透气。南京农业大学吴志行等研究认为，对蔬菜作物对比幻想的基质，其粒径最好以0.5-10毫米，总孔隙度>55％，容重为0.1-0.8克?厘米－3，空气容积为25－30％，基质的水气比为1：4。
2. It has outstanding physical properties. The matrix must be loose, water, fertilizer and breathable. Wu Zhixing of Nanjing Agricultural University and other researchers believe that for the matrix of vegetable crops, the best particle size is 0.5-10mm, the total porosity is > 55%, and the bulk density is 0.1-0.8g? Cm-3, the air volume is 25-30%, and the water air ratio of the matrix is 1:4.