Method of using rice straw biochar to maintain yield, increase yield and decrease volatile emission of ammonia

Abstract

The invention discloses a method of using rice straw biochar to maintain yield, increase yield and decrease volatile emission of ammonia. Rice straw biochar is used in the method as a soil improver and fertilizer synergist; the rice straw biochar is proportionally added to a potassium-short calcium-deficient rice field at a time one week before transplanting of rice seedlings; soil is plowed; therice straw biochar is mixed well in a range of from surface to 0-20 cm deep, and meanwhile, surface ponding water is maintained not over 1 cm; irrigating is started 2-3 days before seedling transplanting to maintain field water depth of 3-5 cm; base fertilizer is applied to the rice field one day before rice transplanting; first topdressing is carried out 18-22 days after rice transplanting; second topdressing is carried out 18-22 days later. The method has the advantages that rice yield maintaining and increasing are guaranteed, rice field ammonia volatilization is lessened, straws are recycled, and the method is of important practical significance to the guarantee of global grain security and the like.

Description

technical field [0001] The invention belongs to the field of biomass charcoal, and in particular relates to a method for using rice straw biomass charcoal to maintain and increase production and reduce ammonia volatilization and emission. Background technique [0002] Nitrogen is a major plant nutrient that undergoes various transformations in the soil. Rice agro-ecosystems rely on nitrogen inputs to sustain increased productivity, but farmers often apply more nitrogen fertilizer than required in some areas. Under the condition of high nitrogen input, the loss of nitrogen in the environment will be greater. Soil ammonia volatilization is one of the most important forms of nitrogen loss in paddy fields, which not only leads to direct loss of nitrogen fertilizer and reduces the amount of nitrogen available for crop growth, but also causes serious environmental pollution and causes environmental pollution by significantly contributing to global warming. degradation. Due to th...

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Problems solved by technology

Therefore, the development of measures to slow down ammonia volatilization in rice fields has important practical significance for increasing rice production, maintaining soil fertility, changing nitrogen fertilizer use, low utilization rate, and alleviating agricultural environmental pollution.

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