A large number of microbial communities live in soil ecosystems and play an important role in the conversion of soil material and energy flow. Soil microbial biomass as a biological indicator of soil fertility has been studied in red soil, red and yellow soil, purple soil and other soils. However, there are few reports on this field in black soil. This paper is to study soil microbial biomass in black soil. The analysis aims to provide some theoretical basis for the maintenance and cultivation of soil fertility in the black soil as a means to evaluate soil microbial biomass as an index for evaluating soil fertility in black soil. For the determination of nutrients in black soil, a soil tester can be recommended. This is a very popular soil testing instrument in recent years and its measurement results are accurate and reliable.
In the province of Heilongjiang province, topsoil (0 to 20 cm) with different fertility levels was randomly selected. The soil type was black soil, and they all developed on the loess parent material, mainly forest land and soils for growing corn and soybeans. After the soil samples were retrieved, they were air-dried. After 2mm sieve spare. Weigh 25 g of dry soil equivalent to dry soil into a beaker, add water to a soil moisture content of 25 to 5%, and then seal it with aluminum foil with six small holes (reducing evaporation of water in case of ensuring ventilation). Repeat 6 Incubate for 1 week under 25?1e conditions and stir until ready. The application of soil tester for soil nutrient determination is highly recommended.
Soil organic matter is an important indicator of the level of soil fertility. Soil microbial biomass is the active part of soil organic matter. At the same time, microbial biomass is not only an important source of soil nutrients, but also an important carrier for soil nutrient fixation. Soil microbial biomass carbon and nitrogen all showed extremely significant positive correlation with soil organic matter, indicating that organic matter level is an important factor affecting soil microbial biomass.
After analyzing soil nutrients and microorganisms in black soil by soil testers, it was found that there was a positive correlation between soil microbial biomass and soil fertility indicators such as soil organic matter, total nitrogen, total phosphorus, available potassium, and alkaline dissolved nitrogen. When using soil microbial biomass for soil fertility assessment, the correlation between soil microbial biomass carbon and soil organic matter, total nitrogen, alkaline dissolved nitrogen and total phosphorus was better than the correlation between soil microbial biomass nitrogen and these factors, indicating that soil microbial biomass carbon was used as Soil fertility is more sensitive to microbial biomass than soil nitrogen.
In the province of Heilongjiang province, topsoil (0 to 20 cm) with different fertility levels was randomly selected. The soil type was black soil, and they all developed on the loess parent material, mainly forest land and soils for growing corn and soybeans. After the soil samples were retrieved, they were air-dried. After 2mm sieve spare. Weigh 25 g of dry soil equivalent to dry soil into a beaker, add water to a soil moisture content of 25 to 5%, and then seal it with aluminum foil with six small holes (reducing evaporation of water in case of ensuring ventilation). Repeat 6 Incubate for 1 week under 25?1e conditions and stir until ready. The application of soil tester for soil nutrient determination is highly recommended.
Soil organic matter is an important indicator of the level of soil fertility. Soil microbial biomass is the active part of soil organic matter. At the same time, microbial biomass is not only an important source of soil nutrients, but also an important carrier for soil nutrient fixation. Soil microbial biomass carbon and nitrogen all showed extremely significant positive correlation with soil organic matter, indicating that organic matter level is an important factor affecting soil microbial biomass.
After analyzing soil nutrients and microorganisms in black soil by soil testers, it was found that there was a positive correlation between soil microbial biomass and soil fertility indicators such as soil organic matter, total nitrogen, total phosphorus, available potassium, and alkaline dissolved nitrogen. When using soil microbial biomass for soil fertility assessment, the correlation between soil microbial biomass carbon and soil organic matter, total nitrogen, alkaline dissolved nitrogen and total phosphorus was better than the correlation between soil microbial biomass nitrogen and these factors, indicating that soil microbial biomass carbon was used as Soil fertility is more sensitive to microbial biomass than soil nitrogen.
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