Soil nutrients are the material basis for the survival of soil microorganisms, so the quality and composition of soil nutrients determines the amount of microbial biomass. Soil microbial biomass C and N are considered to be the repository of soil active nutrients, and are important sources of nutrients for plant growth and utilization. The composition and quality of soil nutrients, pH, salinity, NPK content, etc., can be measured using a soil nutrient tester.
Soil microbial biomass plays an important role in the conversion and supply of soil nutrients. Soil microbial biomass C, N, soil microbial respiration and microbial entropy were significantly or extremely significantly positively correlated with soil organic matter, total nitrogen, alkali-hydrolyzable N, and available K, and were significantly associated with total P and available P. Or very significant negative correlation, basically consistent with the relevant research results.
Yang Yuhai et al.'s study on the oasis depression in arid area indicated that the microbial respiration intensity was significantly negatively correlated with organic matter, total nitrogen, available nitrogen, and available phosphorus, and microbial biomass C and N were significantly positively correlated with available phosphorus. Inconsistent. Under intercropping conditions, there is a certain correlation between soil microbial biomass, microbial respiration intensity, microbial entropy, and soil nutrients, indicating that they are closely related to soil fertility and are important factors for the accumulation of soil organic matter and mineral nutrients. Path analysis shows that alkaline nitrogen is the most important nutrient factor affecting the accumulation of soil microbial biomass C. Total nitrogen and alkaline nitrogen are important nutrient factors that affect microbial biomass N, microbial respiration intensity and microbial entropy. Among soil nutrient factors, total nitrogen and available nitrogen are the dominant factors affecting microbial biomass, consistent with the results of this study.
The effect of grasses in the vineyard on soil microbial respiration and microbial entropy is the measure of total microbial activity. The results of this experiment showed that the interplanted grasses all increased the microbial respiration intensity, indicating that the total activity of soil microorganisms increased with the increase of the grass ages in the vineyards. The microenvironmental entropy usually reflects the soil microbes on the soil organic carbon. Using efficiency, if the soil microbial carbon is reduced, indicating that the soil microbial biomass carbon declines faster than the organic matter declines, the soil quality is degrading: while the higher the microbial entropy, indicating the availability of substrate carbon or total organic immobilized by microorganisms The higher the proportion of carbon.
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