Detailed Explanation of Field Management Techniques for Alisma
Alisma is a perennial aquatic plant of the Alismataceae family and also a common wild Chinese medicinal herb in China, mainly distributed in the northeastern region of China. In addition, Alisma has a relatively long flowering period, relatively large flowers, and fairly high ornamental value. Therefore, Alisma is planted over a relatively wide area in China. So how should we manage it when planting Alisma? Below, the editor brings you the key field management points for Alisma. Let's take a look!
1. Thinning and Replanting
After Alisma is planted, frequently observe the growth of the Alisma seedlings and inspect them carefully at regular intervals. If you find seedlings that have been blown over by wind or lodged due to other factors, immediately straighten the seedlings and firm them in place with soil. Then do the thinning work well, control the plant and row spacing properly, and keep seedlings that grow vigorously and are free of pests and diseases. If there are gaps where seedlings are missing, promptly fill them with seedlings of the same growth stage to ensure a full stand of seedlings. Also, in the later period, if you find weak seedlings or seedlings with pests and diseases, immediately fill in seedlings of the same growth stage.
2. Intertillage and Topdressing
Alisma has relatively high nutrient requirements, and its growth period is not long, so if you want high yield when planting, rational topdressing is key. Each topdressing can be carried out together with intertillage and weeding, usually about 4 times throughout the entire growth period. Topdressing can begin about 60-80 days after Alisma is planted, and the amount should be controlled according to the actual growth of the seedlings. If the Alisma seedling leaves are relatively hard and upright, it means the seedlings are currently quite deficient in fertilizer. When fertilizing, mainly use decomposed farmyard manure. In the last two topdressings, increase the proportion of phosphorus and potassium fertilizer to promote the swelling of the Alisma corm and meet the nutrient needs of the Alisma seedlings. Then, after each fertilization, carry out intertillage and weeding in time.
3. Reasonable Watering
Alisma is an aquatic plant, so its water requirements during growth are relatively high. However, the water level requirements change somewhat at different growth stages of Alisma. After the seedlings are planted, the field water temperature should be maintained at about 3 cm. Then, after the second intertillage and fertilization, the aboveground part has relatively strong growth capacity and a relatively high water demand, so the water level should be appropriately increased to about 5 cm. Then, after the next intertillage, the tubers enter the vigorous growth period. At this time, the water level should be appropriately lowered to avoid root rot caused by excessive water.
4. Removing Buds and Flower Stalks
After completing the second intertillage and weeding, pay attention to observing the growth of lateral buds and flower stalks produced by the Alisma plants, and remove them in time. This is because the utilization value of lateral buds and flower stalks is relatively low, and they also consume a large amount of nutrients. When removing flower stalks, break them off from the base of the plant without leaving any residue, so as to avoid bolting again. The method for removing lateral buds is similar to that for other plants, mainly to ensure the healthy growth of Alisma. Moreover, doing the work of removing buds and flower stalks well can also effectively improve field ventilation and light penetration and promote the growth of Alisma.
The above is a brief introduction to the key field management points for Alisma. Of course, we must also do a good job in the prevention and control of pests and diseases to prevent harm to Alisma plants, reduce yield, and affect planting benefits. Also, everyone should note that the entire Alisma plant is toxic, especially the corm, which is even more toxic. Therefore, when using it as medicine, everyone must take it only under the guidance of professionals. That is all for today's introduction. This article is for reference only, and we hope it can help everyone!