How to improve Fertilizer use efficiency in Apple Orchard

1. Increase the content of soil organic matter.

The content of soil organic matter is not only an important index to measure the soil fertility of orchard, but also the basic condition for the production of pollution-free fruit. Soil organic matter can promote the formation of soil aggregate structure and increase soil air permeability. improve soil fertilizer and water conservation capacity and buffering capacity. The slow release of available nutrients of organic matter is beneficial to the absorption of fruit tree roots and causes less pollution to the environment. The measures to increase the organic matter in the orchard include covering grass in the orchard, planting green manure, returning the leaves to the roots of fruit trees, applying organic fertilizer and so on.

2. Balanced fertilization

There are mutual assistance and antagonism among the nutrient elements, and a certain proportion should be maintained when applying fertilizer. When the necessary mineral nutrients are lacking in the soil, the apple tree cannot grow and develop normally. Too much time is not conducive to the growth of apple trees: when there are too many trace elements, apple trees will be poisoned. Therefore, balanced fertilization is necessary to maintain the necessary nutrients for the normal growth and development of apple trees.

3. Topdressing at the right time, a small amount for many times

There are three peaks of apple tree growth in a year: the first is from early April to early May, the second is from early June to early mid-July, and the third is after mid-September, which lasts for a long time, and can be extended to mid-late November in Ninglang. The period of topdressing should be carried out at these three growth peaks.

4. Scientific fertilization

When applying fertilizer, the width of the ditch should be determined according to the amount of fertilizer applied, organic fertilizer and soil should be backfilled, and soluble chemical fertilizer can be applied through the drip irrigation system in the orchard if possible.

Urea, borax, zinc sulfate and calcium amino acid can all be foliar sprayed, and the foliar spraying time is best before 9 o'clock in cloudy or sunny days and after 16:00. The fertilizer can be kept moist and absorbed for a long time on the middle leaves.

5. Appropriate watering

Fertilizer can be absorbed by apple tree roots only when it is dissolved in water, but excess water in the soil will not only make the roots anaerobic and unable to absorb, but also leaching fertilizer. After fertilization, appropriate amount of irrigation should be carried out according to soil water content.

6. don't blindly believe in special fertilizer for fruit trees.

Special fertilizer for fruit trees is not a general fertilizer for all kinds of fruit trees, nor is it suitable for all areas, but it is relatively suitable for a certain age of a certain tree species in a certain area. Therefore, we cannot blindly believe in the special fertilizer for fruit trees, and there is no "omnipotent" special fertilizer for fruit trees.