Latest Key Field Management Techniques for Alisma
Alisma is a perennial aquatic plant of the family Alismataceae, and it is also a common wild Chinese medicinal herb in China, mainly distributed in the northeast region of China. Moreover, the flowering period of Alisma is relatively long, its flowers are relatively large, and its ornamental value is also relatively high. Therefore, the planting area of Alisma in China is also relatively extensive, so how should we manage it when planting Alisma? Below, the editor brings you the key points of field management for Alisma. Let's take a look!
1. Thinning and Replanting
After Alisma is planted, the growth of Alisma seedlings should be observed frequently and checked carefully at regular intervals. If seedlings are found to have been blown over by wind or lodged for other reasons, the seedlings should be straightened immediately and earthed up to stabilize them. Then do a good job of thinning, control the spacing between plants and rows, and keep seedlings that grow robustly and are free of pests and diseases. If there are gaps where seedlings are missing, seedlings of the same growth should also be replanted in time to ensure a full stand of seedlings. In addition, if weak seedlings or seedlings with pests and diseases are found later, seedlings of the same growth should also be replanted immediately.
2. Intertillage and Topdressing
Alisma has relatively high nutritional requirements, and its growth period is not long, so if high yield is desired during cultivation, rational topdressing is key. Each topdressing can be carried out together with intertillage and weeding, usually about 4 times during 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 leaves of Alisma seedlings are relatively hard and upright, it means the seedlings are currently relatively deficient in fertilizer. When fertilizing, mainly use decomposed farmyard manure, and in the last two topdressings, increase the proportion of phosphorus and potassium fertilizers to promote the swelling of Alisma corms and meet the nutritional needs of Alisma seedlings. Then after each fertilization, carry out intertillage and weeding in time.
3. Rational Watering
Alisma is an aquatic plant, so its demand for water during growth is relatively high. However, the water level requirements of Alisma vary somewhat at different growth stages. 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 large demand for water, so the water level should be appropriately increased to about 5 cm. Then after the next intertillage, the tubers enter the vigorous growth stage. 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 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 remnants, 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 a good job of removing buds and flower stalks can also effectively improve field ventilation and light penetration and promote the growth of Alisma.
The above is a brief introduction to the key points of field management for Alisma. Of course, we should 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 more toxic, so 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!