Organic material quantitatively recommending fertilization method for preventing and treating non-point source pollution of vegetable fields

Abstract

The invention discloses an organic material quantitatively recommending fertilization method for preventing and treating non-point source pollution of vegetable fields; based on the standard that theamount of nitrogen or phosphorus brought in by organic fertilizers is 40%-70% of the recommended amount of total nitrogen or total phosphorus, the recommended total amount of nitrogen, phosphorus andpotassium of organic and inorganic nutrients minuses the amount of nitrogen, phosphorus and potassium brought in by the organic materials is the recommended fertilization amount of nitrogen, phosphorus and potassium of inorganic fertilizers is obtained. The amount of nitrogen or phosphorus brought in by the organic materials such as livestock manure fermented organic fertilizers, commercial organic fertilizers or composted fertilizers used in production of protected-cultivation vegetables is taken as the index of the quantitatively recommended fertilization amount of the organic materials; with a method of 'control of the total amount of organic and inorganic nutrients, balanced distributed application of organic and inorganic nutrients and precise quantitative control of chemical fertilizers', the technology of reduction of organic materials of the protected-cultivation vegetables and chemical fertilizer precise application is formed, the total amount of recommended fertilization is determined according to the crop target yield, nutrient absorbing capacity, soil fertility status and irrigation mode, and the amount of topdressing nitrogen, phosphorus and potassium, the topdressingperiod and the distribution ratio of nitrogen, phosphorus and potassium nutrients are determined according to the maximum absorption period of nitrogen, phosphorus and potassium nutrient of crops.

Description

technical field [0001] The invention relates to the field of agricultural planting, in particular to a method for quantifying and recommending fertilization of organic materials for preventing and controlling non-point source pollution in vegetable fields. Background technique [0002] The Huang-Huai-Hai area is an area with a relatively high scale and intensive degree of facility vegetable planting and livestock and poultry manure breeding, and is also one of the areas with serious agricultural non-point source pollution in the main facility vegetable production area. On the one hand, the aquaculture industry produces a large amount of livestock and poultry manure, and the application in the vegetable field after harmless treatment is one of the main utilization methods of organic materials; The characteristics of slow soil fertility and nutrient supply play an extremely important role in the cultivation of vegetable field soil fertility. At present, the existing recommend...

AI Technical Summary

Problems solved by technology

At present, the existing recommended amount of organic materials is mainly based on the role of organic materials in fertilizing the soil, emphasizing that the more fertilizers are used, the higher the soil fertility, but the amount of nitrogen, phosphorus, and potassium nutrients brought in by organic materials has not been quantitatively calculated into the total amount of nutrients recommended for fertilization. Excessive application of fertilizers leads to the accumulation of nitrogen and phosphorus nutrients, especially in livestock and poultry manure and commercial organic fertilizers. The risk of loss has aggravated the non-point source pollution of the vegetable field. After successive years of planting, the yield and quality of the vegetable field have decreased, and the accumulation of nitrogen and phosphorus in the soil has exceeded the soil nitrogen, phosphorus agronomic and environmental thresholds, resulting in leaching of nitrogen and phosphorus in the soil, polluting the groundwater environment, and causing non-point source pollution. Pollution seriously restricts the environmental cleanliness and green sustainable development of facility vegetable production areas