Ten common problems in the use of chemical fertilizer and their solutions (with identification of chemical fertilizer)

1. Burning seedlings

Reason:

The concentration of fertilizer is too high.

Solution:

Massive watering

Foliar spraying of dilight potassium phosphate

Timely replanting and replanting

2. The fertilizer is not changed.

Reason:

Soil drought

The fertilizer itself is too thick.

Fertilizer is low in nutrients and rich in fillers

Solution:

Select high concentration fertilizer

Watering after fertilization

Do not spread the soil surface

3. The same fertilizer grows differently.

Reason:

Uneven fertilization

Soil fertility difference

Continuous cropping effect

Low-lying soil consolidation

Last crop herbicide residue

High soil moisture or drought

Solution:

Multi-stage fertilization and timely topdressing of poor growth

Try not to repeat it for many years.

Regulation of soil physical and Chemical Properties by Multi-use Organic Fertilizer

Prohibit the use of inferior herbicides to reduce the impact on the next crop

Rational irrigation to maintain soil moisture 60-70%

4. Stiff seedlings

Reason:

Low soil temperature leads to phosphorus deficiency

There are more reducing substances in the soil, such as hydrogen sulfide, which is toxic to rice roots.

Zinc deficiency in soil with partial application of nitrogen fertilizer

Soil salt weight

Solution:

Pay attention to the application of trace elements, especially zinc fertilizer

Adjust the sowing time to miss the cold wave

Using more organic fertilizers to improve soil and reduce soil toxicity

Keep the soil moist to prevent excessive drought

5. The leaves are abnormal.

Reason:

Redness-low temperature phosphorus deficiency

Yellowing-urea excess

Whitening-biuret poisoning

Other-lack of medium and trace elements

Solution:

Balanced fertilization

Change the habit of fertilization

Timely foliar supplement of trace elements

6. Fertilization method

Sashi-easy to lose drought prohibited

Apply it in strips-- good results

Acupoint application-it is forbidden to be too close to the root

Extra-root topdressing-a small amount for many times

7. Planting fertilizer

It is not suitable to make fertilizer:

High concentration of chemical fertilizer (e. G. urea)

Chemical fertilizer with strong hygroscopicity (e. G. ammonium nitrate)

Highly volatile fertilizers (such as ammonium bicarbonate)

Chlorine-containing fertilizers (e.g. potassium chloride and ammonium chloride)

High concentration compound fertilizer

8. Misunderstanding of fertilization

The following views are wrong:

Eager for success: when fertilizing, "close to the plant, fertilizer" is easy to be absorbed

Be greedy and ask for more: fertilize the crops after the lack of fertilizer

Remedy the problem when it arises: as long as the crops grow well (catch the seedlings), they can get high yield.

Personal preference: as long as more fertilizer is applied, the high yield can be obtained, and the high benefit only pays attention to the application of a large number of elements, not to the application of medium and trace elements.

9. Identification of chemical fertilizers [1]

Packaging: the fancy fertilizer packaged may not be of good quality.

Function: the more fertilizer you promise, the more unreliable it is.

Color: the more colorful the fertilizer is, the more worried it is, especially potash fertilizer.

Content: fertilizer with high content is good by comparison.

Name: don't think that the name of foreign fertilizer is imported.

10. Identification of chemical fertilizers [2]

Appearance: nitrogen fertilizer is white crystal, potash fertilizer is white crystal, but Canadian potash fertilizer is reddish brown, phosphate fertilizer grayish white or gray

Solubility: both nitrogen and potash fertilizers are soluble in water, while phosphate fertilizer is only partially soluble or insoluble in water.

Combustion: a large amount of white smoke, ammonia odor, sour taste, bursting sound, dry explosion beating, combustion-supporting effect

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