Key Field Management Techniques for Arrowhead (Sagittaria)
Arrowhead is a vegetable and also a medicinal herb, combining edible, medicinal and ornamental value in one, with very high economic value. Today, the editor will introduce to you the field management of arrowhead.
1. Seedling management
The seedling management of arrowhead is very important, because the seedling stage is the most fragile period for arrowhead. Failure to manage it well will lead to seedling death and reduced yield. After the seedlings are successfully established, their condition should be observed regularly. Sometimes, due to weather such as strong winds and heavy rain, water may accumulate and the soil may loosen, making the seedlings insufficiently firm and prone to tilting or lodging. At this time, we should promptly straighten the tilted and lodged seedlings to help them continue growing. However, seedlings that are too severely damaged or seriously affected by pests and diseases should be promptly removed and replaced with healthy seedlings to ensure a full stand and yield. Do a good job of weeding to prevent weeds from competing for nutrients needed for seedling growth and affecting seedling development.
2. Leaf removal and bud pinching
2-3 weeks after planting, observe the growth of the arrowhead plants. When the plants have grown 6-8 leaves, carry out one round of intertillage and weeding, remove the tiller shoots in the middle of the plants to reduce nutrient consumption and prevent competition for nutrients, then remove the 3 oldest leaves and bury them deep in the soil together with their petioles. Carry out leaf removal once every half month until the end of October, when the plants are in their vigorous growth period. During growth, intertillage and weeding should also be carried out as appropriate according to soil conditions, and bud pinching should be done well to appropriately suppress plant growth, prevent excessive vegetative growth and reduce yield.
3. Timely topdressing
Arrowhead has relatively strong growth capacity and high yield, so its demand for nutrients is relatively large. Only sufficient nutrients can ensure robust plants and high yield. Therefore, appropriate topdressing should be carried out throughout the entire growth period of arrowhead. In the early growth stage, nitrogen fertilizer should be the main type, combined with an appropriate amount of phosphorus and potassium fertilizer. As with leaf removal, fertilizer should also be applied about once every half month. However, in the later stage, the application of nitrogen fertilizer should be controlled to prevent excessive vegetative growth of arrowhead, which would reduce field ventilation and light penetration, affect corm formation and lower yield. After entering the corm formation stage, apply one heavy fertilization to promote corm formation and prevent nutrient deficiency. Each time fertilizer is applied, pay attention to whether the plants are moist. Topdressing should be carried out after the dew on the plants has dried to prevent fertilizer burn.
4. Pest and disease control
Pest and disease control for arrowhead is very important. We should understand the peak periods of various pests and diseases, take preventive measures well and strengthen field management. Common pests and diseases of arrowhead include leaf spot disease and aphids. We should master the control measures for various pests and diseases. During the growth period of arrowhead, strengthen field ventilation and light penetration, remove old leaves and branches, diseased leaves and branches, and improve air circulation. It is best to implement crop rotation of more than two years, as the incidence rate under continuous cropping will increase greatly. After disease occurs, promptly check exactly which pest or disease it is, then use the corresponding control measures. Plants with severe disease should be immediately removed and taken out of the field to prevent the disease from spreading.
The above are the field management methods for arrowhead. I hope they can help you!