5results about How to "Increase available phosphorus content" patented technology

The invention relates to the technical field of fertilizer preparation, and particularly discloses a modified flotation phosphate tailing-based composite calcium magnesium phosphate fertilizer and a preparation method thereof, and the composite calcium magnesium phosphate fertilizer is prepared from modified flotation phosphate tailings, dolomite, limestone, an activator, a binder, a magnesium supplement conditioner and water. The flotation phosphate tailings are deeply modified by adopting a composite pretreatment liquid synergistic activation-gradient composite modification process, so that the effectiveness of nutrients such as phosphorus, calcium and magnesium in the flotation phosphate tailings and the environmental safety are remarkably improved; and through the raw material compounding design of calcium and magnesium source collaboration, gradient magnesium supplementation and conditioning synergism, quick-acting and long-acting collaborative supply of nutrients and a soil improvement function are realized. The flotation phosphate tailings are used as main raw materials, the technological process is simple, energy consumption is low, the prepared composite calcium magnesium phosphate fertilizer is balanced in nutrient, lasting in fertilizer efficiency and excellent in physical performance, and unification of solid waste recycling, product high value and production greenization is achieved.

This application relates to the field of microbial technology, and in particular to a method and application for improving soil bioavailable phosphorus using protozoa. This application aims to utilize a soil-environment-friendly protozoan method for improving soil bioavailable phosphorus. The method of this application has advantages such as simple and convenient operation, low cost, environmental friendliness, a rich selection of microbial strains, in-situ application, and avoidance of nutrient loss, low utilization rate, pathogen contamination, and heavy metal contamination caused by excessive fertilization. Simultaneously, it significantly increases the organic phosphorus content of the soil.

This invention provides a biological method for activating organic phosphorus in gleyed paddy soil, belonging to the field of soil improvement technology. The biological method involves introducing green algae into the paddy field after the rice seedlings have turned green, artificially cultivating a periclump biological community. This community utilizes the photosynthetic oxygen release from the periclump to increase the soil's redox potential and soil microbial activity, accelerating organic matter mineralization. Simultaneously, the method introduces phosphate-solubilizing bacteria into the paddy field after the rice enters the tillering stage, increasing the abundance and activity of phosphate-solubilizing bacteria in the soil. These bacteria then produce phosphatases, further accelerating organic phosphorus mineralization. The biological method provided by this invention effectively increases the abundance and activity of phosphate-solubilizing bacteria in gleyed paddy soil, thereby increasing the available phosphorus content in the soil.

The application belongs to the technical field of fertilizers, and provides a preparation method of modified fulvic acid and application of the modified fulvic acid in fertilizers.The preparation method of the modified fulvic acid comprises the following steps: step 1, dissolving fulvic acid in deionized water, ultrasonic activation, after reaction, drying to obtain activated fulvic acid; step 2, dissolving the activated fulvic acid in a sodium hydroxide solution, heating to 40-45 DEG C for 10-15 min, after cooling, adjusting pH, adding a polymer monomer and an initiator, heating to 40-45 DEG C for 3-3.5 h, and drying to obtain modified fulvic acid. The application introduces new functional groups, such as amide groups, into fulvic acid molecules through chemical reactions, so as to enhance the chelating capacity or adsorption performance of the fulvic acid on specific nutrient elements, thereby effectively preventing the fixation of the elements in soil, and improving the absorption efficiency of the elements by plants.

The invention discloses a phosphorus-solubilizing fungus soil remediation agent as well as a preparation method and application thereof, and belongs to the technical field of soil remediation. The phosphorus-solubilizing fungus soil remediation agent comprises micro-nano bone black and a penicillium deserticola solid fungicide. The preparation method comprises the following steps: pyrolyzing pig bones, and grinding to obtain the micro-nano bone black; the method comprises the following steps: coating a solid culture medium with penicillium deserticola for culturing to obtain a solid plate, washing the solid plate after spores are mature to obtain a spore liquid, mixing a solid carrier with sterile water, then adding a solid fungicide protective agent, and finally adding the spore liquid to obtain the penicillium deserticola solid fungicide. The phosphorus-solubilizing fungus soil remediation agent provided by the invention not only can effectively promote dissolution of insoluble phosphate, but also can fix heavy metal cadmium (Cd) in soil, has a very good application value for farmland Cd pollution remediation and environmental protection, is green and environment-friendly, can comprehensively improve soil fertility, and creates a good nutritional condition for crop growth.