I. Soil test items:
1. Soil nutrients: soil ammonium nitrogen, soil available phosphorus, soil available potassium, soil nitrate nitrogen, soil hydrolyzed nitrogen, soil total nitrogen, soil total phosphorus, soil total potassium, soil organic matter (Lin Qiu method), soil organic matter (leaching method), PH value, salt content and moisture.
2. Trace elements in soil: soil calcium, soil magnesium, soil sulfur, soil silicon, soil boron, soil iron, soil copper, soil manganese, soil zinc and soil chlorine.
3. Fresh crop nutrition: nitrate nitrogen, ammonium nitrogen, phosphorus and potassium; Trace elements in crops: calcium, magnesium, sulfur, silicon, boron, iron, copper, manganese, zinc and chlorine; Nitrate and nitrite in crops.
Second, soil nutrient detection:
The nutrients in the soil are necessary for the growth of plants. Too little or too much nutrients will affect the growth and development of crops, so reasonable soil nutrient content is very important for crop growth. Soil nutrient detection can help us guide fertilization. Soil detection indicators generally include nitrogen, phosphorus and potassium, organic matter, moisture, salt, PH, medium and trace elements, heavy metals and so on.
Third, soil moisture detection:
Soil moisture is an index reflecting soil water content. Through the detection of soil water content, it can help us to carry out scientific irrigation according to the detection data, and ensure that crop yield or quality is not affected by water content (too much or insufficient). The detection of soil moisture can be carried out by SL-SJ soil moisture analyzer of Lance Instruments.
Four, the detection of heavy metals in soil:
Detecting the content of heavy metals in soil can judge the pollution degree of a piece of soil. Generally speaking, excessive heavy metals in soil are caused by industrial pollution and fertilizer abuse.
Once crops absorb heavy metals and are eaten, it will do great harm to human health. The detection index of heavy metals is generally that the contents of cadmium, copper, arsenic, chromium, mercury, nickel, iron, aluminum, zinc, manganese and copper in the soil meet the limit requirements. The heavy metal detection instrument can be SL-ZJS of Lance Instruments, which is convenient and quick.