The effect of soil on crop growth
Crop growth is inseparable from the soil, many times the smallest changes in the soil may cause changes in crop growth, especially in today's environment of excessive fertilizer use, metal pollution, etc, the soil is facing salinization, pH imbalance, slabbing and other problems, of which soil pH is one of the important factors affecting crop growth, we in the daily planting how to identify soil pH, effective adjustment of soil pH How can we identify soil pH and adjust it effectively in our daily planting?
1. The effect of pH on crops
Crop growth has certain requirements for pH, but generally speaking, a pH value greater than 9.0 or lower than 2.5 is not suitable for any crop growth, so we should adjust the soil pH appropriately according to the planted crops.
Underground pests often require a certain range of pH environment conditions, such as bamboo locusts like acid and golden turtles like alkali; some diseases only attack within a certain pH range, such as emaciation disease often occurs on alkaline and neutral soil.
2.The influence of pH on fertilization
Soil pH not only affects the growth of crops, but also reduces the efficiency of fertilizer application. Both acidic and alkaline will affect the effect of fertilizer, and also inhibit the activities of microorganisms, resulting in slow growth and retarded development of crop roots.
First of all, imbalance of soil pH will reduce the effectiveness of fertilizer application. At pH over 7.5 or below 6, phosphoric acid and calcium or iron and aluminum form a late-effective state, making it less effective. Calcium, magnesium and potassium are easily replaced and leached out in acidic soils.
Secondly, soil pH imbalance will affect the activity of microorganisms, we all know that soil improvement can be done with microbial agents, but pH imbalance will inhibit the activity of microorganisms in the soil and affect their regulation activities on the soil.
Thirdly, imbalance of soil pH will produce some harmful substances. Soil is too acidic to produce free state Al3+ and organic acids, which are directly harmful to crops. After a certain amount of soluble salts in alkaline soil, it will directly affect the germination and normal growth of crops.
3. How to judge soil acidity and alkalinity
The easiest way to determine soil pH is using a soil data logger, which is both simple and accurate.