How to fertilize chestnuts? Key points of the latest technical method tutorial
Right now is the season when chestnuts hit the market, and we should also introduce some key management points for chestnut cultivation; after all, chestnuts are delicious but not easy to grow. Chestnut trees are generally very tall, so they need a lot of nutrients during growth; even basic growth nutrients exceed those of other fruit trees. So today we will introduce the key points of fertilization in detail.
1. Satisfy the base fertilizer
Base fertilizer accounts for about 60% of the annual fertilization amount, and it can restore the consumption after fruiting in previous years and restore tree vigor. Generally, nutrients must be laid down every year. After harvesting the fruit in autumn, it can be applied together with plowing, which can improve soil structure and help root growth. About 4,000 jin of farmyard manure, compost, and the like are used per mu. Each tree uses 1 jin to 1.5 jin of compound fertilizer.
2. Topdressing stage
Apply topdressing once before flowering, after sprouting, mainly using nitrogen fertilizer; each tree uses 0.6 to 1 jin of high-nitrogen compound fertilizer. This is mainly to promote shoot growth, more flowering, and more fruit set. The second topdressing is during the fruit expansion period, mainly applying 1 jin to 2 jin of high-potassium compound fertilizer per tree. In the later stage, spray trace elements, manganese, and magnesium to improve fruit quality.
3. Fertilization methods
Use radial fertilization: at the edge of the tree canopy, dig about 5 trenches, 0.3 m wide, with the depth gradually increasing from the outside inward. This is suitable for per-plant application when using compound fertilizer. For young trees, use ring-shaped trench application, which is beneficial for absorption. Strip trench fertilization is suitable for applying base fertilizer; sometimes when fertilizer is insufficient, a whole-orchard broadcast application does not have to be carried out.
4. Fertilization principles
Base fertilizer is mainly farmyard manure, which has an auxiliary effect of improving the soil. It is applied after fruit harvest, when the temperature is high and fertilizer decomposition treatment is relatively easy. This is also the root growth period. Topdressing is mainly based on quick-acting nitrogen, combined with phosphate fertilizer and potassium fertilizer. Topdressing is mainly done in spring and summer. If foliar spraying is used, it can be done multiple times within a year. Before shoots flower and one month before harvest are the key times.
Chestnut fertilization mainly consists of applying sufficient base fertilizer, then carrying out reasonable topdressing according to the growth stage, and additionally carrying out appropriate targeted foliar spraying. In addition, a suitable fertilization method can be selected.