The effect of trace element fertilizers? How to scientifically use trace element fertilizer

Trace elements include nutrients such as boron, zinc, molybdenum, iron, manganese and copper. Although plants require very little trace elements, their effects on plant growth and development are as important as large amounts of elements. When a trace element is lacking, the growth and development of the crop will be significantly affected, the yield will decrease, and the quality will decline. On the other hand, too much trace elements can poison crops, affecting yield and quality, and even endangering human and animal health in severe cases. With the continuous increase of crop yield and the large-scale application of chemical fertilizers, the demand for correct application of trace element fertilizers has become increasingly urgent. Among the trace element fertilizers, iron, manganese, zinc, copper sulfuric acid, boric acid, molybdate and monovalent salts thereof are usually used.

First, the application method of trace element fertilizer

1. Soil application method The trace element fertilizer can be used as base fertilizer, seed fertilizer or top dressing. In order to save fertilizer and improve fertilizer efficiency, it is usually carried out by means of application or acupoint application. The application of trace element fertilizers in soil has a certain aftereffect and can be applied every other year.

2. Planting shaft fertilization method The quick-acting trace element fertilizer is mostly applied to plants. The fertilization methods are as follows:

(1) Seed dressing Dissolve the trace element fertilizer with a small amount of water, spray it on the seed, stir while spraying, so that the seed is stained with a layer of fertilizer solution, and dried after sowing. The amount of seed dressing is generally 1 to 6 g per kg of seed and 40 to 60 mL of water.

(2) The soaking concentration of soaking trace element fertilizer is 0.01%-0.1%, the soaking time is 12-24h, and the seed-solution mass ratio is 1:1.

(3) This method can be used when applying root mineral fertilizer to rice and other transplanted crops. The concentration is 0.1% to 1.0%. The fertilizer used for rooting does not contain substances that are harmful to the roots.

(4) External application of root spray is a cost-effective application method for the application of trace element fertilizer. The commonly used concentration is 0.02%? 0.1%. It is advisable to wet both sides of the blade with both sides. For the application of iron, zinc, boron, manganese and other trace element fertilizers which are easily fixed by soil, the application method is better.

Second, the application of trace element fertilizer should pay attention to matters

The application of trace element fertilizers has its particularity. If it is not applied properly, it will not only increase production, but will even cause serious damage to crops. In order to improve fertilizer efficiency and reduce injury, the following matters should be noted when applying:

1. Control the dosage and concentration, and strive to apply uniform crops. The amount of trace elements is very small. The concentration range of many trace elements from lack to proper amount is very narrow. Therefore, the application of trace element fertilizer should be strictly controlled to prevent the concentration from being too large. Pay attention to uniformity. It is also possible to mix the trace element fertilizer into an organic fertilizer.

2. For the application of trace elements in soil, the effectiveness and content of trace elements in different types and different textures are different, and the effect of applying trace element fertilizers is different. In general, the calcareous soil iron, zinc, manganese, copper and boron in the north are low in effectiveness and prone to lack; while the acid soil in the south is low in effectiveness. Therefore, the application of micro-fertilizer should be rationally applied to the condition of trace elements in the soil.

3. Injecting various crops to the response of trace elements. The application of various substances has different reactions to different trace elements. The sensitivity is different, the amount of demand is also different, and the application effect is obviously different. For example, the effect of applying zinc fertilizer on corn is better. Rape is sensitive to boron, gramineous crops are sensitive to manganese, and legumes are sensitive to molybdenum and boron. Therefore, it is necessary to rationally select and apply the sensitivity and fertilizer efficiency of different crops to different trace elements.

4. Injecting poison to improve soil environment Soil micro-element supply is often insufficient due to soil environmental conditions. The acidity and alkalinity of the ten soils is the primary factor affecting the effectiveness of trace elements, followed by soil texture, soil moisture, and soil redox status. In order to completely solve the problem of trace element deficiency, we should pay attention to improving soil environmental conditions while supplementing trace element nutrients. For example, acidic soil can adjust soil acidity and alkalinity by applying organic fertilizer or applying appropriate amount of lime to improve soil micronutrient status. .

5. Injecting with a large amount of elemental fertilizers and organic fertilizers can only show the obvious effect of increasing the yield of the micro-element fertilizers under the premise that the bamboo materials meet the needs of a large amount of elements such as nitrogen, phosphorus and potassium. Organic fertilizer contains a variety of trace elements, as an important source of nutrient supply to maintain soil micro-element fertility, can not be ignored. The application of organic fertilizer can adjust the soil environmental conditions to achieve the day of improving the effectiveness of trace elements. The combination of organic fertilizer and inorganic micro-fertilizer should be an important measure for the management of soil trace element nutrients in agricultural production in the future.

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