Under the leadership of Prof. Xu Gang, PI of technological system of modern agricultural vegetable industry in Jiangsu Province and a three-level research team, the vegetable cultivation laboratory has studied the key cultivation technologies of vegetable in facility from facility configuration, seedling raising technology and cultivation technology, etc. In recent years, remarkable progress has been made in the optimization of facility configuration and modernization and standardization of facility, innovation and integrated application of key technologies for vegetable factory seedling raising, research and development of new soilless cultivation technologies, etc.
1. Research on optimization, modernization and standardization of facilities configuration
Breakthroughs have been made in accurate and scientific calculation of lighting angle of solar greenhouse, standards for large-scale and modernization of solar greenhouse in Jianghuai area, improvement of thermal insulation function of solar greenhouse, construction technology of solar greenhouse and net room, etc. In order to obtain the maximum light intake and duration, Jianghuai region was divided into three regions according to latitude. According to latitude, the optimum lighting angle was accurately calculated to be 26-29.3 degrees, which was 6 degrees higher than that of simple solar greenhouse and 20% higher than that of simple solar greenhouse. The height and width of solar greenhouse were increased reasonably. Top height of Su-style III solar greenhouse has been raised from about 2 m of simple greenhouse to 4.7 m, and its span has been widened from about 7 m to 10 m. The original solar greenhouse with only external coverage, the internal coverage was increased. And the suitable inner covering material was defined. The covering mode was optimized, and the insulation board was added outside the wall to strengthen the insulation function. The average temperature increase in winter was more than 6 degrees. The Su-style solar greenhouse and insect-proof net room suitable for Jianghuai area were developed and finalized, and the provincial standard was formulated. It provides a key technical support for the transformation and upgrading of vegetable facilities in Jianghuai region from traditional to large-scale, scientific and standardized.
New Solar Greenhouse
2. Innovation and Integrated Application of Key Technologies in Vegetable Factory Seedling
Aiming at the problems of incompatibility of vegetable factory seedling facilities, lack of key technologies and relatively low level of scale commercialization in Jianghuai area, the whole process integrated technology of vegetable factory seedling was studied and developed. Significant progress has been made in the research and development of new seedling facilities, the development of vegetable seedling substrates in facilities, and the technology of seedling and light-supplementing. The research production has promoted the modernization of vegetable seedling in our province and greatly increased the application rate of vegetable factory seedling. The optimum ratio of red to blue light is 0.3-1.5:1 for solanaceous vegetables seedlings, 3-6:1 for melon and fruit vegetables seedlings. The optimum light intensity was 1800-2100 Lux, which was 90% lower than that of traditional supplementary light, traditional lighting was must be up to 20,000 Lux. The results have solved the bottleneck problem that low temperature and weak light in winter and spring hindered the normal growth of vegetable seedlings in Jianghuai area for a long time. This makes light supplementation seedling was a feasible and practical technology. Experts evaluated the research results as leading position in China.
Tomato Seedling Breeding and Light Supplementary
Factory Seedling Production Base
Large-scale production of seedling substrates
3. Research and Development of New Soilless Culture Technology
It has made remarkable progress in research of molecular mechanism of low light affecting fruit enlargement, study on high efficiency and precision light quality and spectrum of vegetables, nutrition mechanism of vegetable super-high yield. Four new soilless cultivation systems and two new soilless cultivation systems based on LED for leaf vegetables, melons, fruits and vegetables were developed. Provincial standards have been formulated and two national invention patents have been obtained. The vegetable total nutrient cultivation medium was domestic initiative, and the industrialization of its achievements promotes the demonstration and extension of new soilless cultivation technology in the whole province. New soilless cultivation system has become a new method and equipment for super-high-yield cultivation in large-scale greenhouses in modern agricultural parks and large-scale specialized vegetable bases. It was also a technical support for the modernization of protected vegetables.
Comparative transcriptome analysis reveals molecular response to low light stress of watermelon fruit expansion
Watermelon cultivation with total nutrition soilless culture substrate
Efficient light supplementation in tomato cultivation
New soilless cultivation system
RNA-seq analysis of the transcriptional response to red and blue light in pakchoi
