Time and method of fertilization for apple trees

Apples have to be cultivated for many years after planting, and they will bear fruit for many years after the young tree stage in the first few years, so fertilizing is always needed to ensure nutrition and keep the tree in good condition. There are many kinds of fertilizers to choose from, the time of fertilization should be carried out according to the growth process, and the methods of fertilization should be suitable and beneficial to absorption. Therefore, we will introduce the specific contents of these aspects later.

1. Base fertilizer

The base fertilizer is mainly farm manure, which is applied once according to the amount of fertilizer in the whole year, and it is generally applied after adding phosphate fertilizer together. Base fertilizer is applied after fruit harvest and before defoliation. In this way, it can be absorbed in time, restore the consumption of results, and prepare for germination in the coming spring. Fertilization in the root hair distribution area, mainly under the tree, ring fertilization, or square trench fertilization, along the crown fertilizer.

2. Foliar fertilizer spraying

Fertilizing before flowering or during flowering or fruiting period, you can choose the method of foliar spraying, which is generally carried out on a cloudy or sunny afternoon, but not in strong light. Generally, urea can be sprayed with a concentration of 0.3%, potassium sulfate 0.2% and calcium superphosphate 0.5%. You can add some boron, spray borax, and other elements. This is mainly a supplement of fertilization, or root fertilization, the combination of chemical fertilizer and farm manure, strip ditch fertilization.

3. Root growth

Can be fertilized at the root growth peak, generally there are three root growth peaks, from mid-March to mid-April, the main application of nitrogen fertilizer is to promote shoot growth, but also to supplement phosphate fertilizer, the earlier phosphorus fertilizer is applied, the better use; from the end of May to the middle of June, the main application of potash fertilizer, immediately into July, the fruit needs potash fertilizer, coloring and sweetness are inseparable from potash fertilizer; the next time from mid-September to November. At this time, the main application of rotten farm manure to promote root growth.

4. Fertilization method

In general, base fertilizer needs to be applied in annular ditch, which can be absorbed and utilized fundamentally. However, the pre-flowering, flowering and fruiting stages of topdressing are all furrow fertilization, which is convenient, rapid and evenly absorbed. It can also be a combination of water and fertilizer, such as laying pipes, dissolving fertilizer in water and fertilizing through drip irrigation. You are free to add. In this way, the ring root hair and soil structure can not be broken.

Apple tree fertilization, the time according to the growing period, there are root fertilization and root topdressing, root topdressing, there are a variety of ways to choose. The above is a brief introduction of apple tree fertilization and fertilization methods.