Determination method, correction method and method for designing rice fertilization formula of nitrogen nutrient application reduction model based on controlled-release fertilizer

Abstract

The invention belongs to the technical field of crop planting and fertilizing methods, and particularly relates to a determination method, correction method and method for designing a rice fertilization formula of a nitrogen nutrient fertilization reduction model based on a controlled-release fertilizer. According to the method, through a large number of field trials, the inventor finds a balancepoint between the controlled-release fertilizer application proportion and the nitrogen nutrient application reduction proportion for the first time under the condition that the rice yield is not reduced, and systematically proposes a mathematical relationship model between the controlled-release fertilizer application proportion and the nitrogen nutrient application reduction proportion. According to the nitrogen nutrient application reduction model based on the controlled-release fertilizer, enterprises or grain farmers can be guided to formulate an application reduction scheme according tolocal conditions and self actual conditions, the matching amount and the fertilization formula of the controlled-release fertilizer and common fertilizer for rice are reasonably designed under the condition of application reduction, and the method is simple and convenient to operate. According to the method, the formula can be designed according to local conditions, the utilization rate of the fertilizer is increased, the investment cost can further be greatly reduced, and environmental pollution is reduced.

Description

technical field [0001] The invention belongs to the technical field of crop planting and fertilization methods, and in particular relates to a method for determining and correcting a nitrogen nutrient reduction model based on controlled-release fertilizers and a method for designing fertilization formulas for rice. Background technique [0002] Rice is one of the important food crops, with a planting area of ​​more than 400 million mu, accounting for about 30% of the area of ​​food crops, and its output is close to half of the total food production. At present, about two-thirds of the population uses rice as a staple food. Rice production occupies an extremely important position and plays a pivotal role. [0003] Due to the rapid release of nitrogen fertilizers and short fertilization period, only multiple or large-scale fertilization can meet the nutritional needs of rice throughout the growth period and increase yield. However, this long-term fertilization mode leads to lo...

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Problems solved by technology

[0006] Therefore, the technical problem to be solved in the present invention is to overcome defects such as rationally designing the ratio of rice controlled-release fertilizer and common fertilizer, low fertilizer utilization rate, high cost, and serious environmental pollution while reducing application in the prior art, which cannot be adapted to local conditions, Thereby providing a method for determining a nitrogen nutrient reduction model based on controlled-release fertilizers and a method for designing rice fertilization formulas

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