Key Points and Precautions for Fertilizing Konjac
Konjac may not be familiar to us. It is highly toxic itself, but its tubers are edible after processing and have extremely high nutritional value, making them quite popular on the market. For example, the most common konjac tofu is made from it as the raw material. Konjac has a long growth period and high yield, and also has a relatively large demand for fertilizer, so how should konjac be fertilized? Let's take a look together.
1. Nutrient Requirements
Konjac is a tuber plant. It has many roots and strong absorption capacity. Throughout its growth period, it requires 16 elements, and it has a relatively large demand for elements such as nitrogen, phosphorus, potassium, calcium and magnesium in the soil. According to research data, for every 1000 kg of konjac produced, 5-6 kg of nitrogen, 4-5 kg of phosphorus and 7-8 kg of potassium are consumed. When fertilizing konjac, do not apply chicken manure, and a certain distance should be kept between the fertilizer and the tubers. Organic fertilizer or farmyard manure must be composted and thoroughly decomposed before application, so as not to burn the tubers.
2. Fertilization Principles
During the seedling stage, konjac absorbs relatively few nutrients from the soil. After it enters the growth period, it begins to rapidly absorb nutrients from the soil, and by the tuber expansion stage, its nutrient absorption reaches its peak. Therefore, when fertilizing, importance should be attached to the base fertilizer. The base fertilizer accounts for 70%-80% of the total fertilization amount. When fertilizing, organic fertilizer should be the main component, with chemical fertilizer as a supplement, and during topdressing, apply a small amount or none at all.
3. Applying Sufficient Base Fertilizer
Before planting, in combination with soil plowing, apply 3000-5000 kg of high-quality decomposed organic fertilizer per mu, as well as 60-80 kg of compound fertilizer, or 50 kg each of calcium phosphate and potassium chloride can be used instead. Apply the base fertilizer at the bottom of the sowing furrow, mix it evenly with the soil, then cover with about 3-5 cm of fertilized soil to prevent the seed taro from directly contacting the fertilizer and affecting germination, and then cover with soil.
4. Reasonable Topdressing
Generally, topdressing is needed 2 times. The first time is at the seedling stage, which can be carried out together with intertillage and weeding. Apply 30-40 kg of organic fertilizer and 15-25 kg of compound fertilizer per mu, or 10-12 kg each of urea and potassium sulfate can be used instead, to accelerate seedling growth. The second time is at the tuber-switching stage, carried out together with intertillage. Apply 30-50 kg of organic fertilizer and 30-40 kg of compound fertilizer per mu, or 20 kg each of urea and potassium sulfate can be used instead.
The above is an introduction to konjac fertilization techniques. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.