From mid-June to mid-July, seedlings are promoted to root (for potato seedlings that are not rooted, root seedlings are not required to grow seedlings and direct ridge cultivation.). Due to the high temperature of sweet potatoes after planting, the growth rate of the above ground part is fast, which may easily cause leggy seedlings, affect the development of roots, plant seedlings 10-15 days after planting, do not carry out other management during seedling growth, and consciously control the growth rate of the aboveground part and promote the roots to lower To lay a good foundation for increasing production. Timely cultivating and weeding, loosen the soil, increase soil permeability, and reduce weeds' absorption of nutrients. After planting soil, loosen the soil through the soil, broaden the root growth space and prepare for the expansion of the tubers. Do not bury the sweet potato vines in the soil so as not to affect the growth. Summer sweet potatoes are not particularly dry and generally not watered.
Second, the mid-term managementFrom late July to early September, vines grow rapidly in high temperature and rainy season. In order to inhibit the growth of some parts of the ground, vines should be promptly lifted. That is, the vines should be lifted gently, and the adventitious roots on short vines should be torn down, and then they should be returned to their original locations. Controlling the growth of stems and leaves, drying the soil, and improving the permeability of the soil cannot be reversed. The anti-vine tends to damage the stems and leaves, disturb the uniform distribution of leaves, affect photosynthesis, and cause a reduction in production. During drought, the leaves become yellow and premature, and 15 kg of urea can be applied per acre, and 1-2 kilograms of the microbial fertilizer can be used for watering.
Third, late managementFrom the end of August to the beginning of September, the golden squid root seedling (500 ml) is sprayed to dilute the root of the jinbab 800-1000 times, 1-2 bottles per mu and spray once every 7-10 days to increase the root system to the fertilizer. Absorption, control the length of the stem vines, increase the thickness of the leaves, thereby inducing the transfer of nutrients to the potato, and accelerate the expansion of the tuber, can increase production by about 10%.
IV. Pest ControlSummer sweet potato diseases and pests are relatively few. The main sweetpotato hornworm and wheat moth, bite the upper leaves, occurred in late August and September, the sweet larvae of sweetpotato larvae, with 80% dichlorvos 2000 times per acre, spraying once every 7 days, Continuous control 2-3 times. The initial stage of wheat moth larvae is to use 50% phoxim EC 1000 times, spray after 4 pm, and spray once every 7 days.
V. Foliar sprayingFrom mid-September to the end of September, top dressing is done outside the roots to promote tuber enlargement. It can be sprayed with 0.2% potassium dihydrogen phosphate solution + gold treasure root seedlings (500 ml) 500-800 times for foliar application. Dihydrogen phosphate is needed per acre. Potassium 50-75 grams, gold treasure root seedling strong 75-90 ml, 7 days interval, continuous spraying 2-3 times, spraying fertilizer should be carried out in the evening, when the temperature is low, the solution evaporates slowly, is conducive to leaf absorption.
Six, timely harvestWhen the temperature dropped to 15-20 degrees Celsius and the underground 5 centimeters were below 16 degrees Celsius, the timely harvest of the tubers stopped when they expanded. Pay attention to not damage the epidermis at the time of harvesting and store in graded packing. The vines are first removed from the ridge 5-8cm and bundled. The vines can be used to feed pigs, cattle, sheep, etc., and sweet potatoes can be harvested with a rake or a farm implement. Store sweet potatoes, remove small tubers, wounded potatoes, and diseased potatoes. Choose sweet potatoes with smooth surfaces and uniform size for storage. Harvest them on the same day and enter the pit on the same day to prevent sweet potatoes from sleeping in the fields to prevent them from freezing. Details can be consulted: Beijing Huaxia Kangyuan Technology Co., Ltd. telephone toll-free hotline
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