The spatial variability of soil chemical properties has always been studied by scholars, and GIS technology has also been applied in this spatial variability study. Most of the studies focused on soil physical properties, changes in soil salinity, and spatial variability of soil nutrients in northern drylands. There are few studies on soil nutrient in paddy fields. The role of soil nutrient tester in project research is obvious to all. Moreover, when studying the spatial variability of soil, scholars at home and abroad mostly study the spatial variability of soil characteristics caused by natural conditions such as topography and soil formation factors. In addition, long-term cultivation of paddy soil in high-yielding rice areas in China has an obvious characteristic of man-made soils. In addition to studying the variation caused by natural conditions, it must pay great attention to the variation caused by human factors, such as the farmland caused by different managements. The difference in soil fertility and so on. Aluminium Mesh,Aluminum Wire Mesh,Aluminum Expanded Metal Mesh,Aluminum Chain Mesh KAM KIU ALUMINIUM GROUP , https://www.kamkiualuminium.com
According to the results of the National Soil Census, the parent material of the plot is a fluvial lake sediment, which is a lake soil with a heavy earth texture and a pH of 610. Since the contracting of the joint production, the plots have been contracted by four rural households, one season of mid-season rice has been planted each year, and the winter has basically been abandoned. The sampling time is April 2002. After the soil samples were air-dried, milled and sieved, a series of soil nutrients (all N, all C, quick-impact P, quick-impact K, and quick-effect) were performed by the Agricultural and Environmental Research Laboratory of the Northern Ireland Ministry of Agriculture in accordance with the standard analysis method of the Department of Agriculture of the United Kingdom. Determination of Cu, Zn, Mn, and Mg). Soil pH was measured using a 1B215 soil-water ratio suspension; soil N and full C were analyzed using a LecoCN-2000 combustion analyzer; soil available P was determined using the Olsen method, and soil available K, Mn, and Mg contents were leached with ammonium acetate solution. In addition, flame photometric determination; soil available Cu, Zn content using EDTA extraction, AAS determination.
The results of soil nutrient tester showed that the natural conditions such as soil parent material, texture, topography, and climate were completely the same in the paddy field, and the difference in soil nutrients was mainly caused by the different field management of 4 farmers. Therefore, it can be considered that artificial factors such as fertilization method and fertilization amount have a great influence on the spatial variability of paddy soil characteristics, especially on the spatial variability of paddy soil nutrients.
Soil Nutrient Tester to Study Spatial Variability of Soil Nutrients in Paddy Fields