1. Seedling burn

Cause:

Fertilizer concentration too high.

Solution:

• Water heavily

• Spray potassium dihydrogen phosphate on the leaves

• Replant or switch crops in time

2. Fertilizer not dissolving

Cause:

• Soil drought

• The fertilizer itself has too thick a coating

• The fertilizer has low nutrient content and many fillers

Solution:

• Choose high-concentration fertilizers

• Water after fertilizing

• Avoid broadcasting on the soil surface

3. The same fertilizer produces uneven growth

Cause:

• Uneven fertilization

• Differences in soil fertility

• Continuous cropping effect

• Low-lying terrain and compacted soil

• Herbicide residue from the previous crop

• Soil moisture too high or drought

Solution:

• Apply fertilizer in split doses and topdress poor-growing plants in time

• Try to avoid continuous cropping for many years

• Use more organic fertilizer to regulate the soil's physical and chemical properties

• Prohibit the use of inferior herbicides to reduce the impact on the following crop

• Irrigate reasonably and maintain soil moisture at 60-70%

4. Stunted seedlings

Cause:

• Low soil temperature leading to phosphorus deficiency

• More reducing substances in the soil, such as hydrogen sulfide, which poison rice roots

• Excessive nitrogen fertilizer application and soil zinc deficiency

• High soil salinity

Solution:

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

• Adjust the sowing time to avoid low-temperature cold waves

• Use more organic fertilizer to improve the soil and reduce soil toxicity

• Keep the soil moist and prevent the soil from becoming too dry

5. Abnormal leaves

Cause:

• Reddening -- low temperature and phosphorus deficiency

• Yellowing -- excessive urea

• Whitening -- biuret poisoning

• Other -- deficiency of medium and trace elements

Solution:

• Balanced fertilization

• Change fertilization habits

• Supplement trace elements on the leaves in time

6. Fertilization methods

• Broadcasting -- easily lost, prohibited in drought

• Band application -- good effect

• Hole application -- do not place too close to the roots

• Foliar topdressing -- small amounts, multiple times

7. Seed fertilizer

Not suitableFertilizers used as seed fertilizer:

• High-concentration chemical fertilizers (such as urea)

• Highly hygroscopic chemical fertilizers (such as ammonium nitrate)

• Highly volatile chemical fertilizers (such as ammonium bicarbonate)

• Chloride-containing fertilizers (such as potassium chloride and ammonium chloride)

• High-concentration compound fertilizers

8. Misconceptions about fertilization

The following views arewrong:

• Rushing for quick results: when fertilizing, the closer to the plant, the easier the fertilizer is absorbed

• Seeking more and bigger: fertilizing only after crops show signs of nutrient deficiency

• Waiting for problems before remedying them: as long as the crops' vegetative growth is good (establishing the seedlings), high yields can be obtained

• Personal preference: as long as more fertilizer is applied, high yields and high returns can be obtained; focusing only on applying macronutrients and not on applying medium and trace elements

9. Identification of chemical fertilizers [1]

• Packaging: the fancier the fertilizer packaging, the worse the quality may be

• Function: the more functions a fertilizer promises, the less reliable it is

• Color: the more colorful the fertilizer, the less reassuring, especially potash fertilizer

• Content: by comparison, fertilizers with higher content are better

• Name: do not assume that a foreign fertilizer name means it is imported

10. Identification of chemical fertilizers [2]

• Appearance: nitrogen fertilizer is white and crystalline, potash fertilizer is white and crystalline, but Canadian potash fertilizer is reddish-brown, and phosphate fertilizer is grayish-white or gray

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

• Burning: a large amount of white smoke, ammonia odor, sour taste, crackling sounds, dry explosion and jumping, combustion-supporting effect

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