What is the unit of soil microbial diversity/activity?
The soil microbial diversity/activity value is a value that numerically evaluates how vigorously diverse organic matter is decomposed under specific conditions by all microorganisms contained in the sample, and is the only evaluation method in the world. is the value.Therefore, the unit is "soil microbial diversity/activity value" or "BIOTREX".It does not represent the number or amount of microorganisms.
How to evaluate the difference between 30, 40 and 100, 150 soil microbial diversity/activity values?
Is 30 bad and 40 better? Is 100 million better than 150 million?
The larger the value, the more diverse the microorganisms in the soil and the higher the activity of decomposing organic matter.Soils with very low values tend to have some problems with their biological properties, while soils with high values tend to have good biological properties, are less prone to soil diseases, and produce better quality products.Note that there is no correlation between short-term yield and value.The short-term yield will be higher if the nitrogen content is higher, such as by using chemical fertilizers.It also increases when there are many different types of weeds in or around the field.It is realistic to decide the target value to aim for while considering productivity, workability, etc., instead of pursuing only high value.
I think there are good and bad microorganisms in the soil, but do you know how many of them there are?
Among the farmers who have been working on soil preparation, there have been people who have created very good soil that does not cause diseases in the soil.At first, it was thought that such soil contained a large number of particularly effective microorganisms. I was in
It turns out that the important thing is not the specific bacteria, but the balance of soil microorganisms.It wasn't just the specific superior microorganisms that made the soil better.Therefore, research to analyze the diversity and activity values of microorganisms in soil has been carried out for XNUMX years, and the resulting values are the soil microbial diversity and activity values.This value is a very objective and scientific way of evaluating the results of how vigorously various organic matter is decomposed.
In sandy soil, there are few soil microorganisms, and it is thought that the soil microbial diversity and activity value will be low, but excellent agricultural products are produced.How should we understand it?
There are many soils that produce high soil microbial diversity and activity even in sandy soil.There are farmers who work on soil preparation to create an aggregated structure, and such soil produces high soil microbial diversity and activity values.On the other hand, even if the soil is not sandy, there are many soils that have lost their aggregated structure due to overuse of chemical substances.Soil microbial diversity and activity values of such soils are low.
Are the types of microorganisms that live in different regions different?
The important thing is the balance of soil microorganisms.Individual microbes may vary from region to region, but that is irrelevant in terms of balancing the results of decomposition.In any region, soil with high diversity and activity values is biologically rich soil.
If a large amount of compost, such as 10 to 20 times more than usual (for example, 30t or XNUMXt per XNUMXa) is applied, the crops will not grow, but the soil microbial diversity and activity value will be high.
Soil preparation is not something that can be done by adding a lot of compost.It is important to add the required amount of good quality compost.As a result of the analysis so far, it is known that the value decreases when a large amount of compost is added at once to the soil where microorganisms do not grow.In addition, when poor quality compost is used, the soil microbial diversity and activity values decrease year by year.
Composting is costly and labor intensive, and it takes a very long time to recover from failures after the application.Soil microbial diversity and activity values are used to investigate the compost that was in the field and the amount of fertilizer applied.
Isn't there a seasonal variation in the soil microbial diversity and activity value (BIOTREX)?In what season should soil be sampled?
Even when samples are taken during the cold season, the activity of the microorganisms is monitored at 25°C during the analysis, so the microorganisms that are dormant during the cold season will wake up, so this will also be evaluated.We have also conducted tests in warm and cold regions, but there is no big difference in the results.
So far, there doesn't seem to be much of a difference between seasons.Rather, if the soil is not well prepared, there is a difference depending on the development stage of the plant (the value will be higher when the roots are well developed, but it will be lower when the plants are not planted, such as after harvest). Please consider.If the soil is well-prepared, the value tends to remain high and not easily fluctuate regardless of the developmental stage of the plant.
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