Method for measuring use rate of nitrogen balance nitrogen fertilizer of greenhouse pot experiment

Abstract

The invention relates to a measuring method for nitrogen fertilizer utilization, and discloses a method for measuring the use rate of nitrogen balance nitrogen fertilizer of a greenhouse pot experiment. The method comprises the following steps of selecting representative surface soil; arranging the pot experiment, carrying out management, recording the grain yield and the straw yield when crops are ripe, and reserving samples for analysis; measuring the base soil total nitrogen content, the grain total nitrogen content, the total nitrogen content of soil in each pot after the crops are harvested. The calculation formula is REN[balance]=U / (FN+SN), wherein the REN[balance] represents the nitrogen fertilizer use rate calculated through a nitrogen balance method, the U represents harvest nitrogen elements, the FN represents fertilizer nitrogen elements, and the SN represents the storage capacity reduction quantity of nitrogen elements of soil of a soil body. The method is short in measuring time and accurate in measuring result, influence caused by the external environment on the method is low, the considered factors are comprehensive and reasonable, the measuring result is stable and reliable, fertilizer application can be well guided according to the recommended, amount calculated through the method, of applied fertilizer, and the method has high market popularization value and broad market prospect.

Description

technical field [0001] The invention relates to a method for measuring nitrogen fertilizer utilization. Background technique [0002] As we all know, nitrogen fertilizer is a chemical fertilizer containing the crop nutrient nitrogen, which plays a very important role in crop growth. It is a component of amino acids in plants, a component of protein, and a component of chlorophyll that plays a decisive role in photosynthesis in plants. components, and nitrogen can also help crops disperse. Therefore, a reasonable increase in nitrogen fertilizer can not only increase the yield of crops, fertilize soil nitrogen fertility, but also improve the quality of crops, but excessive fertilization has negative effects on crop quality and atmospheric environment to varying degrees, and this effect requires scientific research Personnel provide effective, economical and efficient fertilization methods and fertilization rates, and soil nitrogen utilization rate (subtraction method) is an i...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for measuring the utilization rate of nitrogen balance and nitrogen fertilizer in greenhouse pot experiments, so as to solve the problems that the amount of applied nitrogen fertilizer obtained by calculation in the prior art is low and unstable.