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在第一讲关于无土栽培的概念叙述中,已明确从广义范围来说,凡是不用天然土壤而用人工合成材料来栽培作物都可称为无土栽培。在第二、三讲里介绍的营养液栽培技术是同天然土壤差别较大的一种无土栽培技术。在这一讲里主要介绍一种与天然土壤十分接近的人工合成土壤——仿天然土壤的无土栽培技术。这种仿天然土壤的特点是保持天然土壤的优点,克服天然土壤的缺点,具有优于天然土壤的性状。现在国内有些报刊上叫做营养土,培养土等等名称。一、基本要求
In the first narrative of the concept of soilless culture, it has been clear that in the broad sense, the cultivation of crops with synthetic material without natural soil can be termed as soilless culture. In the second and third lectures, the nutrient solution cultivation technique is a soilless cultivation technique that differs greatly from natural soils. In this talk, we mainly introduce a kind of synthetic soil close to the natural soil, which is a soilless cultivation technique of imitation natural soil. This imitation of natural soil is characterized by the advantages of natural soil to overcome the shortcomings of natural soils, with better properties than natural soils. Now some domestic newspapers called nutrition soil, cultivate soil and so on. First, the basic requirements