Soil Nutrient Tester Analysis of Wetland Soil Nutrients

The study of soil spatial heterogeneity began in the 1970s. Many foreign soil scientists did a lot of research on the spatial variability of soil physical properties, but most of them remained in the qualitative description. By the 1980s, the spatial heterogeneity has become an important part of soil science research and has begun to shift from qualitative description to quantitative research. It has successfully introduced geostatistical regionalization variable theory to analyze the spatial distribution of soil properties and determine the scale of soil spatial variability and The research on the various processes of soil variation and other fields has greatly promoted the progress of this research. The research on spatial heterogeneity of soil started late in the country. In the late 1980s, many scholars began to use geostatistical methods to study the spatial variability of soil properties such as moisture, water permeability, and humidity, and they have achieved remarkable results. Effectiveness. However, up to now, there has been little research on the spatial heterogeneity of nutrients in wetland soils at home and abroad. It is intended to introduce geostatistical methods into spatial heterogeneity of wetland soils on the basis of previous studies. The soil nutrient tester is also an instrument widely popularized in recent years.

The soil nutrient variable in wetland is a regional variable, which is also a random function but different from the special nature of pure random variable. It also has random and structural characteristics. The classic Faster statistics assume that the samples are completely independent and subject to a normal distribution. However, many studies in recent years have shown that many soil parameters are not completely spatially independent, but there is a spatial correlation within a certain range. Therefore, the use of the classical Faster statistics method alone can not meet the needs of soil spatial heterogeneity research. Geostatistics is a new spatial analysis method developed in recent decades. Its variability function is suitable for quantitatively studying the spatial structure variation characteristics of regionalized variables and can fully reflect the structural characteristics of regionalization variables. Many geostatists at home and abroad have summarized on the basis of many years of research that the geostatistics research method is based on the regionalization variables and uses the variation function as the main tool to study those who are both random and spatially distributed. Structural, or spatially related and dependent, natural phenomena of the most effective quantitative research methods. This provides work experience and basis for the use of geostatistics to quantitatively study the spatial heterogeneity of soil nutrients in wetlands.

With the strengthening of human resources and environment development, human activities have become a new and powerful force influencing the migration, transformation and recycling of elements in wetlands. Many wetland ecosystems have changed the input of nutrients due to humans building channels for dams, sewage, and deforestation. Soil nutrients were measured using a soil nutrient tester. On the one hand, fertigation and irrigation are used to increase the input of nutrients to wetland systems. At the same time, many pollutants often have localized effects on their nutrient cycling and distribution patterns as industrial wastewater and urban and rural domestic sewage are transported to wetlands. . On the other hand, the nutrients in wetlands are reduced by biomass output and other methods. Deforestation exacerbates highland erosion and changes the distribution of wetland hydrological conditions and nutrient elements. The imbalance of soil nutrients in wetlands will induce a series of ecological and environmental problems. Therefore, it is necessary to study the spatial heterogeneity of soil nutrients in wetlands. It will have important theoretical guiding value for the protection and restoration of wetlands.

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