49results about How to "Reduce photosynthesis" patented technology

A method of regulating the temperature of the rhizosphere environment of strawberries in a sunlight greenhouse is characterized in that pipeline branch pipes are directly distributed on culture substrate of overhead strawberry cultivation tanks, and each pipeline branch pipe is 5-8cm away from each strawberry plant; in winter, an ordinary pressure hot-water boiler is filled with water in advance, the water is heated to reach the temperature of 55-60 DEG C, a water pump is switched on, water currents flow through the pipeline branch pipes distributed on the culture substrate and directly heat the rhizosphere environment of the strawberries, the water returns to the ordinary pressure hot-water boiler, and the temperature of the rhizosphere environment of the strawberries is maintained in the range from 15 DEG C to 20 DEG C through continuous circulation of the process; in summer, tap water with the temperature ranging from 20 DEG C to 23 DEG C is adopted and does not need to be heated, the water pump is switched on directly, the tap water flows through the pipeline branch pipes distributed on the culture substrate and directly decrease the temperature of the rhizosphere environment of the strawberries, the tap water returns to the ordinary pressure hot-water boiler, and the temperature of the rhizosphere environment of the strawberries is maintained in the range from 23 DEG C to 25 DEG C through continuous circulation of the process. As the mode of directly increasing or decreasing the temperature of the rhizosphere environment of the strawberries is adopted, the method is beneficial to control of plant diseases and insect pests, beneficial to the strawberries to accumulate photosynthetic products, beneficial to improvement of root activity, good in temperature regulating effect, rapid in efficiency, low in equipment cost, low in operation and maintenance cost, and meanwhile obvious in energy-saving and water-saving effect.

The invention belongs to the technical field of macromolecules and discloses a special fully-biodegradable mulch film material conducive to soil moisture preservation and a preparation method of the special fully-biodegradable mulch film material. The material comprises a first component and a second component and is characterized in that the second component is an ethylene / ethenol copolymer, and the first component is prepared from, by mass, 200-450 parts of polylactic acid, 500-800 parts of poly(butyleneadipate-co-terephthalate), 2.5-5 parts of an antioxidant, 2.5-5 parts of an anti-ultraviolet agent, 50-80 parts of a plasticizer and 2-5 parts of erucyl amide. By a raw material ratio, a melted material is high in fluidity, excellent film forming property is achieved, products are high in toughness and tensile strength, and thus excellent-performance degradable much films thinner than 10micrometer can be produced; in addition, raw material airtightness is improved, excellent barrier property is achieved, moisture evaporation can be reduced, and a foundation is laid for preparation of the mulch films with excellent moisture preservation performances.

The invention relates to a method and a system for producing biodiesel by cultivating microalgae by using urban sewage. According to the method and the system, a sewage treatment system is converted from a treatment technique to a production technique; high contents of organics and nutrients such as nitrogen and phosphorus in the urban sewage are conducive to mass propagation of the microalgae, so that the sewage is converted from pollutants to raw materials for the growth of the microalgae; CO2 circulation and O2 circulation are tightly combined through the establishment of an algal-bacterial symbiotic system, so that the growth of the microalgae is no longer dependent on an external carbon source, and meanwhile, the production cost is low due to the reduction of aeration systems in an aeration tank; the illumination in the aeration tank is abundant due to the use of a photosynthesis component, which is conducive to the photosynthesis of the microalgae; and the subsequent sludge quantity is small due to the use of efficiently-degraded strains.