The Latest High-Yield Fertilization Technology Tutorial for Isatis indigotica

Isatis indigotica (woad) is a medicinal plant we are all familiar with. It has the effects of clearing heat and detoxifying, cooling the blood and soothing the throat, and also antibacterial, antiviral, and immune-enhancing effects. In our daily lives we often use it to prevent colds. However, when growing Isatis indigotica, fertilization is the key to achieving high yields. Let's take a look at the high-yield fertilization techniques for Isatis indigotica together.

1. Apply sufficient base fertilizer

Before planting or when preparing the soil, a large amount of slow-release or delayed-release fertilizer can be applied into the soil as base fertilizer. The base fertilizer is generally mainly organic fertilizer or farmyard manure, and it is also combined with an appropriate amount of nitrogen-phosphorus-potassium compound fertilizer, then turned and buried into the soil. When planting, farmyard manure is generally used as the base fertilizer, applying 3000-4000 kg of decomposed farmyard manure, 15 kg of diammonium phosphate, and 4 kg of biological potassium fertilizer per mu, spreading them evenly on the soil, then deep plowing the soil to bury them.

2. Seed-dipping fertilizer

Seed fertilizer, as the name suggests, is fertilizer applied when sowing or when transplanting seedlings, mainly to improve the nutrients needed for seed germination or seedling growth. Among these methods, fertilizer can be used to dress the seeds, fertilizer can be dissolved in water and diluted to soak the seeds, or fertilizer can be applied into the holes when sowing. For seed fertilizer, trace elements and organic fertilizer or granular fertilizer are generally chosen. Fertilizers such as urea and ammonium bicarbonate should not be chosen, as these fertilizers very easily burn the seeds and cause germination failure.

3. Timely topdressing

Topdressing is fertilizer applied during the plant's growth and development period. When the plant grows vigorously, its demand for nutrients is relatively large. If nutrients are insufficient, it will affect its growth. Therefore, at this time, topdressing should be done in a timely manner. Topdressing is generally mainly quick-acting fertilizer, so as to quickly supply nutrients and prevent nutrient loss. There are many methods of topdressing: broadcasting, band application, watering application, and foliar spraying. For topdressing, the best choice is a combination of organic fertilizer and chemical fertilizer, applying 40-60 kg of organic fertilizer and 10-20 kg of compound fertilizer per mu, then covering with soil and pressing it firm. After topdressing, try to choose a time before the rainy season, or water immediately after fertilizing.

4. Wintering fertilizer

If Isatis indigotica is sown in autumn, a wintering fertilizer needs to be applied before overwintering, so as to prevent the plants from suffering freeze damage, help them overwinter safely, and promote robust growth the following year. The wintering fertilizer should be applied before the soil freezes. Stable manure is generally chosen, and the fertilizer is spread directly around the plant roots, which can play a role in keeping them warm. After the thaw the following spring, break up the fertilizer and spread it flat.

The above is an introduction to the high-yield fertilization techniques for Isatis indigotica. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.