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How can mint be grown for high yield?
First, nursery l, rhizome reproduction. Breeding takes place in late April or late August. In the field, plants with strong growth and no pests were selected as the mother plants, and planted at a row spacing of 20 × 10cm. After harvesting the stems and leaves from the ground in early winter, the rhizomes remained in place as seed plants.
2. Reproduction of ramets. Mint seedlings are about 15cm high, and should be thinned and supplemented. Transplanted seedlings were used.
3. Cutting propagation. From May to June, the above-ground stems and branches were cut into cuttings with a length of 10 cm. On the prepared seedbed, cuttings were planted at a row spacing of 7 × 3 cm. After rooting and germination, they were transplanted to the field for cultivation.
2. Transplanting 1. Mint is transplanted before germination in the early spring of the second year. Early planting germinates early, growing period is long, and yield is high. When planting, dig up the rhizomes, choose thick, short internodes, and disease-free rhizomes as seed roots, cut into 7-10cm long sections, and then open a trench with a depth of 10cm in 25cm row on the prepared surface. The seedlings were placed obliquely in the ditch to cover the fine soil with a 10 cm plant spacing, and they were ground and watered.
2. Topping and topping. When the plant grows vigorously in May, the top buds should be removed in time to promote the growth of side branches, stems and leaves, which is beneficial to increase yield.
Third, the first knife period management (emergence to first harvest)
1. Check seedlings for replanting. After the field is basically full of seedlings, the seedlings should be inspected in time, and the missing or thinning spots and slices should be replanted.
2. Cultivation and weeding. After the seedlings are planted, weeding and weeding between the rows, and weeding between the plants are carried out in order to protect the moth, increase the (ground) temperature, eliminate weeds, and promote seedling growth. Before weaving, weeding and weeding 2-3 times. Pull out weeds in the field before harvesting to prevent the smell of other weeds from affecting the quality of peppermint oil.
3. Topdressing in time. When the seedling height is 10-15cm, furrow and topdress, apply 10kg urea per acre, and spray 5ml baobao potassium dihydrogen phosphate 150g urea 150g twice after the line is sealed.
4. Scientific watering. The mint needs more water in the first and middle stages, especially in the early stage of growth. The root system has not yet formed and needs more water. Generally, it is watered about 15 days, and 4-5 times of water is needed from emergence to harvest. After the line is closed, it should be lightly poured to prevent the stems and leaves from growing crazy and lodging, which will cause the lower leaves to fall off and reduce yield. Stop water 20-25 days before harvesting. It is advisable to whiten the ground when harvesting.
5. Disease control. The main disease of peppermint is black shin disease, which occurs at the seedling stage. Symptoms include shrinkage and depression of the base of the stem, darkening, rot, and lodging and wilt. For prevention and treatment, 70-percent chlorothalonil or 40-percent carbendazim 100-150g can be used in the mu during the onset period and sprayed with water.
â‘ Peppermint rust, easy to occur in May-July, spray with 25% powder rusting 1000-1500 times liquid leaf spray.
â‘¡Spot blight, which occurs from May to October, and is sprayed with 65% Daisenzine 500 times solution at the beginning of the disease, which can be controlled once a week.
6. Pest control. The main pests of peppermint are bridge-building insects, and the damage period is around mid-June and around late August. In general, the density of insect mouths is 10 heads / m2, and 15-20ml can be killed per acre, sprayed 1-2 times, or sprayed with 80% dichlorvos 1000 times.
7. Harvest in time. At the beginning of July, harvesting started when 10% -30% of the buds of the main stem of peppermint were in full bloom. When harvesting, the upper stems and leaves should be cut off uniformly, and the cut mint should be spread out immediately to dry, not to accumulate, so as to avoid fermentation. Harvesting peppermint too early will reduce oil yield, and harvesting too late will increase the furfur content of peppermint, which will affect the quality of the oil. The sun-dried mints are bundled in time for distillation and refining.
Four and two knife period management (after the first harvest to before the second harvest)
1. The two-knife period has a short growth period. After harvesting, the first knife should promptly clean up the leaves in time for distillation and refining. The stubble, weeds, and stolons (usually 2-3 cm deep) should be removed as soon as possible to promote the emergence of -TJ seedlings from the rhizomes.
2. Water the stubble immediately to promote the early and rapid growth of the two-sword seedlings, extend the growth time, and increase yield. Watering 3-4 times in the second knife stage, when the seedling height is 10-15cm, apply 10 kg of urea on acres (grooves), 1-2 times of foliar topdressing, and pull the grass 1-2 times before harvesting, so that there is no debris in the field before harvest grass.
V. Harvest 1. Harvest time is from mid-September to mid-October.
2. When dried to 7-8%, tie it into small pieces, and then dry until completely dry. The body is full of leaves, the leaves are dark green, the stems are purple brown or light green, and the aroma is strong.
How can mint be grown for high yield?