Sweet potato is an important food crop, which has the characteristics of strong adaptability, high yield and high nutritional value. In the process of growing sweet potatoes, if they grow too vigorously, it may adversely affect the yield and quality of sweet potatoes. Therefore, measures need to be taken to control the growth of sweet potatoes. The following are measures to control the overgrowth of sweet potatoes:
1. Reasonable fertilization.
Sweet potatoes require different nutrients at different growth stages, so they need to be fertilized reasonably according to the growth of sweet potatoes. In the early stage of sweet potato growth, an appropriate amount of nitrogen fertilizer can be used to promote the growth rate of sweet potatoes. However, in the later stage of sweet potato growth, it is necessary to control the amount of nitrogen fertilizer to avoid excessive nitrogen fertilizer and lead to sweet potato growth. At the same time, phosphorus and potassium fertilizers can be added to promote the root development and sugar accumulation of sweet potatoes.
2. Control moisture.
Water is one of the important factors in the growth of sweet potatoes. During the growth of sweet potatoes, it is necessary to keep the soil moist, but too much water can cause sweet potatoes to grow. Therefore, it is necessary to control the moisture according to the soil moisture and weather conditions. In the rainy season, it is necessary to drain the water in time to avoid the soil becoming too wet. During the dry season, it is necessary to water at the right time to keep the soil moist.
3. Timely topping.
Topping is one of the important measures to control the growth of sweet potatoes. The growth of the main stem of sweet potato could be inhibited, the development of side branches could be promoted, the number of leaves and photosynthetic area could be increased, and the yield and quality of sweet potato could be improved. In general, topping can be performed when the length of the main stem of the sweet potato reaches about 1 meter.
Fourth, spray inhibitors.
Spraying inhibitors is also one of the important measures to control the growth of sweet potatoes. The spraying of inhibitors can inhibit the stem and leaf growth of sweet potato, shorten the internode length, increase the leaf thickness and chlorophyll content, improve the photosynthetic efficiency, reduce nutrient consumption, and increase the yield and quality of sweet potato. Commonly used inhibitors include chlormequatin, paclobutrazol, etc.
5. Strengthen pest control.
Pests and diseases are one of the important factors affecting the growth of sweet potatoes. In the process of planting sweet potatoes, it is necessary to strengthen pest control, regularly check the growth of leaves and roots, and timely detect and improve pests and diseases. Common sweet potato pests and diseases include black spot, root rot, stem nematode disease, etc. Different control methods can be used for different pests and diseases, such as the selection of disease-resistant varieties, chemical control, etc.
In summary, comprehensive measures are needed to control the excessive growth of sweet potatoes, including reasonable fertilization, water control, timely topping, spraying inhibitors, and strengthening pest control. Through the implementation of these measures, the growth of sweet potatoes can be effectively controlled, the yield and quality of sweet potatoes can be improved, and more benefits can be brought to farmers. At the same time, it can also reduce other problems caused by excessive growth, such as insufficient nutrition, serious pests and diseases, etc. In the future planting process, appropriate planting methods and management measures should be selected according to local climatic conditions and soil conditions to improve the yield and quality of sweet potatoes.