Walnut trees have a long lifespan, bear fruit early, and have high yields, requiring a large amount of nutrients from the soil each year, thus having a high nutrient requirement. Typically, walnut-specific fertilizers can be used to meet the tree's comprehensive nutritional needs during fertilization. So, what are some walnut-specific fertilizers? Details are as follows:
What are some fertilizers specifically for walnut trees?
There are many types of fertilizers specifically for walnut trees, and they are generally available on the market. For example, there is Shenquan Walnut-Specific Water-Soluble Fertilizer with Macro-Elements , Biguo Walnut-Specific Liquid Fertilizer with Biluyuan, and Zhongjia Walnut-Specific Bio -Organic Fertilizer , etc.
What are the methods for fertilizing walnut trees?
1. Base fertilizer
The base fertilizer is mainly fully decomposed farmyard manure. The amount applied per tree is calculated based on the age of the fruit tree, with an additional 10 kg of base fertilizer for each age.
2. Topdressing
(1) Topdressing during the leaf expansion period: The fertilizer should mainly be fast-growing nitrogen fertilizer, such as ammonium nitrate, ammonium hydrogen phosphate and urea.
(2) Topdressing during the fruit setting period: The fertilizer should mainly be fast-acting nitrogen fertilizer, and an appropriate amount of phosphorus fertilizer (superphosphate, phosphate rock powder, etc.) and potassium fertilizer (potassium sulfate, potassium chloride, wood ash, etc.) should be added.
(3) Topdressing during the hardening stage: The fertilizer should mainly consist of phosphorus and potassium fertilizers, with an appropriate amount of nitrogen fertilizer.
(4) Topdressing after harvest: The fertilizer should mainly consist of fully decomposed organic fertilizers such as chicken manure, pig manure and cow manure.
3. Foliar fertilization
Foliar fertilizers can include urea, superphosphate, potassium phosphate, ferrous sulfate, borax, etc., to supplement macronutrients such as nitrogen, phosphorus, and potassium, as well as other micronutrients. For example, spraying borax or boron plus urea during the flowering period can significantly improve the fruit set rate; spraying ferrous sulfate in May and June can make the tree leaves thicker and promote photosynthesis; and spraying potassium sulfate in July and August can effectively improve the quality of the kernels.
