Soil column culture container and soil column culture test method

Abstract

The invention relates to the field of fertilizers, and particularly provides a soil column culture container and a soil column culture test method. The soil column culture container comprises an outerpipe and an inner pipe, the inner pipe is made of deformable materials, and the inner pipe is movably arranged in the outer pipe. When the container is used for sampling after soil column culture, anoriginal structure of a soil column is not damaged, the accuracy is high, and the morphological change characteristics of fertilizer (such as phosphate fertilizer) in a fertilizer zone micro-domain and the migration quantity of fertilizer elements (such as phosphorus) at different distances from a fertilization point can be accurately known. The soil column culture test method adopts the soil column culture container to carry out a soil column culture test. According to the method, the soil column culture container is adopted for a soil column culture test, so that the method has the advantages that the sampling accuracy is high, and the morphological change characteristics of the fertilizer (such as phosphate fertilizer) in the fertilizer zone micro-domain and the migration amounts of fertilizer elements (such as phosphorus) at different distances from a fertilization point can be accurately obtained.

Description

technical field [0001] The invention relates to the field of fertilizers, in particular to a soil column cultivation container and a soil column cultivation test method. Background technique [0002] At present, the seasonal utilization rate of phosphate fertilizer is generally very low, and the seasonal utilization rate of phosphate fertilizer applied to the soil is usually only 10% to 25%. It is generally believed that the main reason for the low utilization rate of phosphorus fertilizers is the fixation of phosphorus in the soil, that is, the available phosphorus that can be absorbed and utilized by crops is converted into ineffective phosphorus that cannot be used by crops in the soil. Therefore, how to improve the utilization rate of phosphorus fertilizer and reduce the fixation of phosphorus in soil has always been the focus of research in the fields of chemical fertilizers and agronomy. [0003] Generally speaking, the greater the initial concentration of phosphorus ...

AI Technical Summary

Problems solved by technology

[0005] However, there are still some deficiencies in the above-mentioned test method: (1) The mobility of phosphate fertilizer is very poor, and after exogenous added materials (also called slow-release materials) and phosphate fertilizer enter the soil, the morphological change characteristics of phosphate fertilizer in the fertile micro-domain cannot be known (2) After exogenous added materials and phosphorus fertilizers enter the soil, the amount of phosphorus migration at different distances from the fertilization point cannot be known

Images