There is another week or so to the beginning of the autumn solar term, the beginning of autumn is exactly the beginning of August, after the beginning of autumn, the temperature difference between day and night will gradually increase, this is the most critical time for crop growth, especially crops like sweet potatoes, into August is a good time for the development and growth of underground potato tubers. Many people may focus on the management of sweet potatoes in the early stage of growth, and when it comes to the growth of potato nuggets, they relax the management, but they don't know that the yield and quality of sweet potatoes mainly come from the period from the beginning of autumn to the time before harvest. As the saying goes, "Sweet potatoes are skillfully managed in August, and there is no problem with a large and high yield", so in August, do the following things, which is the key to high yield of sweet potatoes.
1. Don't forget to turn the vines
There is such a saying in the folk: "sweet potatoes do not turn the vine, in vain tired for a year", which means that planting sweet potatoes need to be turned over the vine, which is the management work that must be done every year since ancient times, if you do not turn the vine, the sweet potato will grow seedlings, when the time comes, not only the sweet potato is less, the size of the potato is also very small, and some do not even bear potatoes. Because the potato vine climbs and grows on the ground, the adventitious roots on the potato vine will gradually penetrate into the soil and get deeper and deeper, so that the nutrients required for the growth of the potato are intercepted by the adventitious roots, and the potato nugget can not get nutrients for the development of the potato nugget. This naturally leads to reduced production. Therefore, after entering August, we must remember to turn the vine, that is, turn the potato vine from one side to the other from the beginning to block the growth of adventitious roots on the potato vine, and the vine needs to be turned 2-3 times during the whole growth period.
Second, pay attention to the control of prosperity
Sweet potatoes in the environment of high temperature and sufficient fertilizer and water, potato seedlings are prone to vigorous growth, and if the potato vine grows vigorously, the potato nuggets will develop slowly or even stop developing, which is what we often say that the light seedlings have no yield. Therefore, for the sweet potatoes with too vigorous seedling growth, it is necessary to carry out appropriate control and control methods: one is to turn the vine to slow down the growth rate of the potato vine, and the other is to use fertilizer to control the growth (100 grams of potassium dihydrogen phosphate plus 30 kg of water). If the potato vine grows wildly and cannot be controlled by other methods, paclobutrazol can be sprayed with water according to the instructions to control the vigorous growth of the seedlings.
3. Supplemental application of potato nut development and expansion fertilizer
After the beginning of autumn in August, sweet potato tubers begin to gradually develop and expand, at this time sufficient nutrients are needed, so timely supplementation of nutrients can promote better and faster development and expansion of potato pieces, which is very important to increase yield. Supplemental fertilizer for sweet potatoes can be applied in a flush, along cracks, or at the roots. Fertilizers can choose potassium dihydrogen phosphate, plant ash, potassium sulfate, human feces, manure water, etc., depending on your own situation.
Fourth, pay attention to the spraying of foliar fertilizer
Foliar fertilizer is a very common way to supplement fertilizer, in fact, spraying foliar fertilizer can not only supplement nutrients to crops, but also protect leaves, slow down aging, and achieve the effect of controlling growth. As the saying goes: "Spraying with fertilizer has a good effect, promotes growth and control, and has a high yield." However, sweet potatoes need more potassium fertilizer in the tubing stage, then, when the potato seedlings are vigorous, we can use high concentration of potassium dihydrogen phosphate as foliar fertilizer spraying, and when the potato seedlings are not vigorous, we can use urea mixed with potassium dihydrogen phosphate to spray, which can promote growth and control prosperity, killing two birds with one stone.
Fifth, pay attention to the prevention and control of pests and diseases
Sweet potatoes generally rarely have diseases, but insect pests are sometimes very serious, whether it is underground pests or aboveground pests, once found, the corresponding drugs should be selected in time for control.
The above is the management tips of sweet potatoes after the beginning of autumn in August, for your reference in management.