1, deep tillage, full base fertilizer
Planting sweet potatoes requires deep and loose soil. The farmer's manure is applied with sufficient energy, and the Mushi farmyard fertilizer is used for 2,800-3,000 kilos. Ridge cultivation can deepen the plough layer to promote root development and tuber enlargement. The method is to first ditch the fertilizer and then cover the soil with ridges, ridge height 27 cm wide and 60-70 cm, the fertilizer in the ridge and then use a hoe in the ridge back to open one or two rows of 10 cm shallow ditch, the potato seedlings along the ditch Place the roots gently, insert the soil slightly into the soil and compact it by hand, and water the cuttings when the bottom is insufficient.
2, early planting shallow broadcast, reasonable close planting
Early planting can make full use of the growing season to increase production. Spring potato can be cut when the temperature of 5 cm is stable above 15°C, and the summer potato is sowed when wheat is harvested. Cutting depth is generally 5-7 cm. The cutting density is 3500-4000 strains per mu for spring potatoes and 5000-6000 strains for summer sweet potatoes, and the short potato varieties can be appropriately increased.
3. Strengthen field management and proper measures
(1) Check seedlings to make up seedlings: Seedlings often cause seedling deficiency due to the hazards of the ground tiger, and should be promptly infiltrated or artificially captured with dipterex grass poison baits. Fill the plant with water to make sure the seedlings are full.
(2) The cultivator protects the early-onset hair: After easing the seedlings, the cultivator shall protect the vines in time and raise the temperature to promote early-onset hair growth. Be careful not to loosen the root soil.
(3) timely and appropriate top-dressing irrigation: Practice has proved that after the survival of the potato seedlings can be lightly applied nitrogen fertilizer, especially in potato tuber root tuber began to expand, suction fertility with a large amount of fertilizer, potassium fertilizer can be applied to the ridge a good strategy. In the end of July to the beginning of August, the combination of cultivating and weeding is generally carried out, and the later period should be considered as good as the combination of foliar spraying in the middle and late August. Or in the cracks, with 250-500 kilograms of manure and manure excrement. Sweet potatoes are drought-tolerant crops, but in the prosperous period of stems and leaves, small water can be used for light irrigation in case of dry weather. The soil moisture in the later period should not be too large. If there is continuous rain, it is necessary to pay attention to drainage and prevent the accumulation of water in the field.
(4) Lifting vines topping hearts and leaf sprays to prevent stems and leaves from growing up: In the past, most people thought that turning vines could reduce rooting and prevent leggy. Experiments have shown that the method of turning vines can cause a reduction in production, and the method of “supplying vines†should be implemented during the pull-vine period. The method of picking up is to remove 1-3 cm of the top of the seed when the vine spreads to 30-50 cm, and control the expansion of the vine to promote the enlargement of the tuber. In addition, sweet potato leaf spray paclobutrazol can inhibit stem and leaf prosperous growth and promote the expansion of tubers. During the vine pull, 50 grams of paclobutrazol was used to spray 50 kg of foliar spray, but after spraying, if there is precipitation (within 24 hours), heavy spraying is required.
(5) Intertilled trenches to improve the expansion of potato wedges: This applies to the expansion of sweet potatoes, cultivating weeds and digging furrows, cracks on ridges, and can reduce moisture and nutrients to promote the expansion of tubers.
4, timely harvest, safe storage
Sweet potato harvest time should be cut before the frost and then lightly dig. Pay attention to light, light, and light to prevent breakage. Finally, the sweet potato blocks without injury, illness, or frost damage were piled up in a potato pit to enhance the management of the pits, especially temperature management.
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