The latest time and method of fertilization for apple trees

Apple after planting to cultivate for many years, a few years before the young tree stage, but also after the fruit for many years, so the growth has always needed fertilizer to ensure nutrition, keep the tree has been good. Fertilization has a variety of fertilizers can be selected, fertilization time should also be carried out according to the growth process, fertilization methods should also choose appropriate, conducive to absorption methods. So I'll introduce the specific contents of these aspects later.

1. Base fertilizer

Base fertilizer is mainly farm manure, which is applied once according to the annual fertilizer occupation, and is generally applied after phosphorus fertilizer is added together with decomposition. Basal fertilizer is applied after fruit picking and before defoliation. This can be absorbed in time, restore the fruit consumption, in order to prepare for the next spring germination. Fertilize in the root hair distribution area, mainly under the tree, ring fertilization, or square ditch fertilization, along the crown fertilization.

2, foliar fertilizer

Fertilization before flowering or flowering, fruiting period, you can choose foliar spraying method, generally in cloudy days or sunny afternoon, can not be carried out under strong light. Generally, urea can be sprayed at a concentration of 0.3%, potassium sulfate at a concentration of 0.2%, and calcium superphosphate at a concentration of 0.5%. Boron can be added, borax sprayed, and other elements. This is mainly a kind of fertilizer supplement, or root fertilization, chemical fertilizer and farm manure combination, strip ditch fertilization.

3. Root growth

Fertilization can be applied at the peak of root growth. Generally, the root system has three growth peaks. From mid-March to mid-April, nitrogen fertilizer is mainly applied to promote the growth of new shoots, and phosphorus fertilizer should be supplemented. The earlier phosphorus fertilizer is applied, the better utilization; from the end of May to mid-June, potassium fertilizer is mainly applied. In July, the fruit needs potassium fertilizer, and the coloring and sweetness cannot be separated from potassium fertilizer; from mid-September to November, the next time. At this time, the main application of decomposed farm manure to promote root growth.

4. Fertilization method

General basal fertilizer needs circular furrow application, absorption and utilization from the root. But topdressing before flowering, flowering, fruiting period, are furrow fertilization, convenient and rapid, uniform absorption. Water and fertilizer can also be combined, such as laying pipes, dissolving fertilizers in water, and fertilizing through drip irrigation. They can be added freely. This does not damage the root hairs and soil structure.

Apple tree fertilization, time according to the growth period, the method has root fertilization and root topdressing, root topdressing, there are many ways to choose. The above is a brief introduction to apple tree fertilization and fertilization methods.