Modified biochar as well as preparation method and application thereof

Abstract

The invention discloses modified biochar and a preparation method and application thereof, and belongs to the technical field of medicinal plant planting, the preparation method of the modified biochar provided by the invention comprises the following steps: (1) diluting a hydrogen peroxide solution with a solution containing phosphorus and potassium compounds to obtain a modified solution; (2) uniformly mixing and stirring biochar and the modified solution, standing, filtering and drying to obtain modified biochar; according to the application, on one hand, soil and modified biochar are mixed according to the mass ratio of 100: (1-5), and sowing is conducted after incubation is conducted for 0.5-2 months. By utilizing the characteristics of increased specific surface area, oxygen-containing functional groups, phosphorus elements, reduced chloride ions and the like of the modified biochar, the modified biochar is applied to planting soil, so that the defects that nutrients of the biochar are imbalanced, salt stress is easily caused by excessive addition and the like are overcome; the physicochemical property, the water holding capacity, the nutrient level and the beneficial microorganism abundance of the soil are comprehensively improved, so that the yield and the quality of medicinal plants are improved.

Description

technical field [0001] The invention belongs to the technical field of medicinal plant cultivation, and in particular relates to a modified biochar and a preparation method and application thereof. Background technique [0002] In recent years, some literatures add biochar to soil to achieve the purpose of promoting plant growth and increasing yield. For example, applying 1000kg / hm 2 The biochar can significantly increase the leaf area, photosynthetic rate, etc. of summer maize, thereby greatly increasing its yield (Zhang Na et al., 2014). Biochar can also significantly improve the seed setting rate and yield of rice (Wang Yueman et al., 2018). In addition, for medicinal plants, existing literature also points out that the application of biochar is conducive to alleviating the obstacles to continuous cropping, thereby increasing the yield of medicinal plants (such as ginseng, lily, Panax notoginseng, etc.), and at the same time improving the production of some medicinal pl...

AI Technical Summary

Problems solved by technology

Therefore, the concentration of soluble ions in soil water will increase significantly, and the soil water potential will decrease, which is not conducive to the absorption and absorption of water by plant roots, and will easily cause plant water loss and other phenomena, thereby reducing the stomatal conductance of plant leaves and increasing the production of abscisic acid , affecting the yield of medicinal plants

Although the prior art has invented the preparation method of modified biochar, however, most of these inventions only focus on the effect of modified biochar on soil properties (cation exchange capacity, heavy metal fixation efficiency, etc.)

Therefore, the research on the effect of modified biochar on the yield and active components (polysaccharides, saponins, etc.) application

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