1. Application of humic acid fertilizer in field crops.

When humic acid fertilizers are used for field crops, humic acid fertilizers with different contents and formulas should be selected according to the nutritional needs of different crops and soil fertility. In general, corn, wheat, cotton and other field crops can be grown with an organic matter content of more than 30 percent. Humic acid organic-inorganic compound fertilizer with a content of more than 20 percent of amic acid. According to soil fertility, use 80-160kg per mu. Apply enough before sowing, and turn the soil to a depth of 20cm. In the middle and later stages of crop growth, use nitrogen, phosphorus and potassium as top dressing. 25%-30% humic acid compound fertilizer 40-80kg.

The method of fertilization depends on the crops, such as spreading, ditching, acupuncture, etc. After fertilization, irrigate with water, or irrigate with humic acid water.

2. Application of humic acid fertilizer on fruit trees.

2.1 Apply basal fertilizer to fruit trees.

Fruit trees generally apply basal fertilizer after their leaves fall in winter. When using basal fertilizer, humic acid organic fertilizer with organic matter content of more than 50% and humic acid content of more than 30% should be used, and 300-400kg per mu. The organic-inorganic compound fertilizer with an acid content of more than 20 percent, nitrogen, phosphorus and potassium content of about 20 percent, and a high humic acid content, 200-300kg per mu.

The fertilization position is on the edge of the canopy projection, and the method of ditching or ditching is used to ditch the edge of the canopy projection. The canopy and old trees are dug 2 circles with a depth of 20-40cm. After fertilizing and burying, it is fully watered to facilitate the absorption of fruit trees.

2.2 Top dressing of fruit trees.

When the fruit tree grows to the expansion stage, apply 80-160kg of humic acid organic and inorganic compound fertilizer per mu. The inorganic nutrients are 25% or 30% of nitrogen, phosphorus and potassium. You can also choose humic acid fertilization with 30% of nitrogen, phosphorus and potassium. Irrigate the roots in the furrow, so that the fruit tree can absorb it well and get quick results.

3. Application of humic acid fertilizer on vegetables.

3.1 Vegetable base fertilizer.

Choose an organic fertilizer with a humic acid content of more than 30 percent and an organic matter of more than 50 percent as the base fertilizer, and apply 300-400kg of fertilizer per mu. After soil preparation, the soil should be turned to a depth of 20cm. The vegetable field has enough organic nutrients to ensure the quality of fruits and vegetables.

3.2 Top dressing of vegetables.

As top-dressing, top-dressing should be done after 10 days of slow seedling planting. The amount of top-dressing for the first time should not be too large, and humic acid compound fertilizer with a nitrogen, phosphorus and potassium content of 25 percent should be used, 30-50kg per mu. Water irrigation. The second top dressing is carried out according to the first top dressing method after the fruit is planted. The amount of top dressing is 50-100kg according to the growth of the crops. Generally speaking, for vegetables in the field season, it is enough to fertilize the crops once or twice. Ten days before picking, according to the fertility situation, humic acid fertilizer can be added once, which is conducive to the expansion of fruits and vegetables.

A variety of fruit and vegetable crops grown in the greenhouse, such as eggplant, cucumber, tomato, etc., can be used with about 30kg of humic acid to prolong the fruiting period.