| The experiment was carried out on tomato (zhongza 105) cultivation using organic soil cultivation with root restriction cultivation (T1) and root non-restriction cultivation (T2), ordinary soil cultivation as a control (CK). Root restriction cultivation means to use waste plastic film under cultivation bed to separate organic soil mixture with bottom soil; root non-restriction cultivation is directly lay organic soil mixture in the ditch without seperation. From plot experiment and laboratory analysis, physical, chemical and enzyme content properties of cultivation substrate in different treatments were measured;the plant growth and physiological properties, yield and nutrient quality of tomato were anlysised. The results obtained as follows:1. Bulk density of root restriction culture of organic soil (T1) and root non-restriction culture of organic soil have no different. Large/small porosity, pH of T2 more suit cultivation than T1. The chemical nature of organic soil such as total N, total P, total K, available N, available P, available K, organic matter content in T1 higher than T2, the soil enzyme content such as phosphatase (acid phosphatase, neutral phosphatase, alkaline phosphatase), cellulose, protease, urease content in T2 higher than T1, the enzyme content such as invertase content in T1 higher than T2.2. Plant length or stem diameter of tomato in T1 can grow better than which in T2 within 30 days after tramsplanting, and root restriction can promote the transition from vegetable growth to reproductive growth, so the flowering and fruit harvest stage were shorten.3. Activity of root system, chlorophyll content, photosynthetic rate of T1 higher than T2 and CK during autumn-winter season cultivation and winter-spring season cultivation, activity of root system of T1, T2 and CK continuance accretion, and chlorophyll content, photosynthetic rate becoming lower from the middle of harvest time.4. Root restriction treatement might significantly enhance tomato yield in early stage, improve nutrient quality and decrease Nitrate content in tomato. The prophase yield of T1 was 1.20kg/plant during autumn-winter season cultivation, improved 25% compare to T2, the prophase yield of T1 was 2.84 kg/plant during winter-spring season cultivation, improved 16.39% compare to T2, the Nitrate content of T1 was 92.8mg/kg during autumn-winter season cultivation, decreased 22.8% compare to T2, the Nitrate content of T1 was 79.9 mg/kg during winter-spring season cultivation,decreased 31.3% compare to T2, The total yield of T1 was 4.54kg/plant during autumn-winter season cultivation, improved 21.7% compare to T2, The total yield of T2 was 7.11kg/plant during autumn-winter season cultivation, improved 4.71% compare to T2.
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