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试验选用萝卜黄叶菌RS-S-3菌株和西瓜蔓割病菌FnC-B菌株。在添加土壤混合物的土壤中,均有分生孢子及厚膜孢子发芽率低及发芽管易于瓦解的特性,以此特性可测知土壤添加物的抑病机制。在碱性营养液中,土壤添加物抑制孢子发芽的效力高。S-H添加物中的矿灰及海蛎壳粉为分解萝卜黄叶病菌发芽管及抑制孢子发芽的主要成分,而矿灰为分解西瓜蔓割病菌发芽管的主要成分。土中施用S-H添加物后,真菌及放线菌的密度增加,但细菌无增减。土中施添加物,可减少西瓜根圈中蔓割病菌14倍。在有病菌的土中,S-H添加物可增加西瓜根重3倍和根数6倍,而
The test selected yellow leaf fungus RS-S-3 strains and watermelon FnC-B strains. In the soils added with soil mixture, the germination rate of conidia and thick-film spores were both low and the germinating tube was easy to disintegrate. Therefore, the inhibitory mechanism of soil additives could be detected by this characteristic. In alkaline nutrient solution, soil additives inhibit spore germination is highly effective. The mineral ash and oyster shell powder in the S-H additive are the main components for decomposing the germinating tube of the radish yellow leaf germ and inhibiting spore germination, and the mineral ash is the main component for decomposing the germinating tube of the watermelon germ-killing germ. After S-H addition in soil, the density of fungi and actinomycetes increased, but no increase or decrease of bacteria. Adding soil additives, can reduce the root circle of watermelon bacteria in the fox 14 times. In germ-bearing soil, the S-H additive can increase the root weight of watermelon three times and the root number six times