作物生产上应用的无土基质分为两类:(1)在栽种前已加入肥料的,如泥炭、树皮、锯屑等有机物.(2)包括岩棉、珍珠岩或蛭石等的固体基质和营养液栽培,如深而通气的和浅而循环的营养液栽培(如NFT即营养液膜技术).本文讨论作物对根系环境如温度、湿度、盐浓度、通气性和养分变化的反应.方法将番茄种植于温室的NFT槽中,通过加热或冷却集水池来调节温度;由于集水池和水槽隔热性能良好,根区能获得稳定的温度.水与养分的吸收,以需增加的体积和养分来计算.在NFT,岩棉和深营养液栽培中,所供营养液的养分含量对作物完全适宜.在泥炭袋栽培中,作物已从掺入泥炭的液肥中吸取N、P、K、Fe和B营养元素.结果和讨论(一)根系温度:根系温度对作物生长和肥水吸收影响很大.植株一般在18℃时长得最高,在22℃以 Soilless matrices used in crop production fall into two categories: (1) Organics such as peat, bark, sawdust, etc., that have been added with fertilizer before planting (2) Solids including rock wool, perlite or vermiculite Substrate and nutrient solution cultivation, such as deep aerated and lightly recycled nutrient solution cultivation (eg, NFT ie nutrition liquid membrane technology) .This paper discusses the response of crops to changes in root systems such as temperature, humidity, salt concentration, aeration and nutrient changes Methods Tomatoes were planted in greenhouse NFT tanks and the temperature was adjusted by heating or cooling the catchment ponds. Stable temperature was obtained in the root zone due to the good thermal insulation of the catchment ponds and sinks. The absorption of water and nutrients needed to be increased Volume and nutrient content of the nutrient solution in the NFT, rockwool and deep nutrient solution cultivation, the nutrient content of the nutrient solution supplied is perfectly suitable for the crop In peat cultivation, the crop has extracted N, P, K, Fe, and B. Results and Discussion A. Root temperature: Root temperature has a significant effect on crop growth and fertilizer-water uptake, with plants generally growing the most at 18 ° C