First, the lack of nitrogen is due to low organic matter content, low temperature or flooding, especially in the mid-term drought or heavy rain is prone to nitrogen deficiency.
Second, phosphorus deficiency is low temperature, soil moisture is small for the incidence of disease, acid soil, red soil, yellow soil is prone to lack of effective phosphorus.
Third, the lack of potassium is generally low in potassium, as before, as a high potassium demand crop, prone to potassium deficiency, sand, loam, moisture or sloping soil is easy to develop.
4. Magnesium deficiency is the soil with high acidity or washed by heavy rain. The potassium content is high, and the potassium content is high or the magnesium content is reduced due to the application of lime.
5. Zinc deficiency soils or soils with excessive phosphorus, high pH, ​​low temperature, high humidity or low organic fertilizer are prone to zinc deficiency.
6. Sulfur deficiency Acidic sandy soil, soil with low organic matter content or cold and humid soil is prone to disease.
Seven, iron deficiency is easy to lack iron in alkaline soil.
Eight, the lack of boron is a drought, soil acidity is high or sand is prone to boron deficiency.
Nine, calcium deficiency is because the soil acidity is too low or mineral soil, below pH 5.5, soil organic matter below 48 or potassium, magnesium content is too high, easy to occur calcium deficiency.
Control method
(1) Correct diagnosis should be based on plant analysis and soil test results and dysfunction.
(2) Advocate the application of compost or decomposed organic fertilizer prepared by enzyme bacteria. Formulated fertilization technology is used to supplement the lack of fertilizer for vegetable corn.
(3) It can also be in the early stages of deficiency. Leaf face application of leaf fertilizer, the specific method See cucumber deficiency syndrome.
(4) Apply Huimanfeng organic active liquid fertilizer 210-240 ml, dilute water 300-400 times or Yunda-120 plant growth regulator 3000 times liquid.
Author: Ma Jing
Source: Agricultural Bureau of Xingtang County, Hebei Province
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