Restoration And Efficient Utilization Of Continuous Cropping Soil In Protected Horticultural (Cut Chrysanthemum)

Along with the development of society and economy, there is an increasing consumption of flowers gardening. Because of the great economic profits, the flower and plant industry develops enormously and many characteristic flower and plant specialization habitats are emerging, particularly facility cultivation.Owing to the difficulty of gardening facility cultivation rotating crops, the insufficient utilization of gardening facility and low benefit, the successive using of gardening facilities and the sole planting and continuous cropping, issues like plant disease and soil secondary salinification intensifies unceasingly. Therefore the continuous cropping barrier has become an urgent issue in installation horticulture technology.This research takes maintaining soil physics, chemistry and the biology quality in the installation horticulture flower and plant production system as a core. Through the facility flowers and plants continuous cropping barrier factor research and analysis, according to the mineral substance stable state nutrition theory and the index fertilizing technology, regulating moisture and nutrient, reducing the soil eutrophication and establishing the index fertilizing plan for the fresh-cut follower of vegetal period.In the full-growth period, the exponential fertilization yields are higher than the one-time fertilization, straight fertilization and average fertilization by 28.04%,13.23% and 14.2% respectively. The soil properties change shows that the exponential fertilization can effectively reduce the residual nitrogen in soil. Nutrient absorbing result shows that the fertilization treatments significantly increases N, P, K of chrysanthemum plant, and promotes the absorption of nutrients. Exponential fertilization is more effective than other treatments.After applying 6 soil conditioners, soil bulk density and water suction are significantly decreased, soil total porosity, capillary porosity and aeration porosity are increased. The pH and EC of soil and total potassium are increased. Total nitrogen and phosphorus content are increased with the decrease of potassium. Biomass, plant height, chlorophyll content and root activity of cut chrysanthemum are also increased significantly. Taking various aspects of effect into consideration, in 6 natural soil conditioners, the 5% zeolite with 300 times diluted geranium bay leaf performs the best and can improve soil obstacles without harming the soil environment.Studies on exponential fertilization and soil conditioners of cut chrysanthemum provide theoretical basis and data support for continuous cropping obstacles solution, offer technical support and theoretical foundation for high quality production of flowers (mainly cut chrysanthemum, etc.) and provide some critical technologies for maintaining ecological environment of horticultural facilities and quality of horticultural products.