Seedling breeding
Sowing can be used to raise seedlings, and underground stems can also be used to propagate. Generally, the underground stem is divided and propagated, and the underground stem is dug out, and 2~3 buds are cut off as propagation materials. Seeding seedlings with seeds has low germination rate and long seedling stage. In the case of sufficient seed blocks, seed propagation is generally not used.
Field planting
After the overground part withers, it can be planted before the underground rhizome germinates, and it can be planted in southwest Hubei and other places from the middle and late period of 1 1 to February of the following year. In the meantime, planting early is better than planting late. In spring, when it was planted, it grew badly. The underground stems that grew in those years were small and there were few flowers. If the plant is planted in June 5438+065438+ 10, buds and flower buds will grow in the next year, and a certain yield can be obtained.
Seeding and seedling raising should be carried out in mid-March, at the seedling stage 180 ~ 220 d, the spacing between plants on the planting ditch is 60~70cm, the underground stems are laid flat on it, the buds are up, the seedlings are 2.7× 104~3.3× 104 plants /hm2, and the soil is covered and then watered 3.0×/hm2.
Tiantuan management
Intercropping: After planting, it grows slowly in the early stage and has large row spacing, which can be intercropped with leguminous crops to improve soil fertility.
Intercropping: At seedling stage, the plant spacing is large and there are many gaps, which are easy to breed weeds. Therefore, intertillage weeding should be timely. Medium-term intertillage should be shallow to avoid damaging underground stems. After planting for 3 years, the underground stems and roots vertically overlap and the growth potential is weak. It is necessary to dig deep in the intertillage and cut off some underground stems and old roots, which can promote the development of new roots and revitalize the aging plants.
Soil cultivation: the tender buds are unearthed in spring, germinated in summer and autumn, and the plants are covered with grass mud, compost and garbage mud. And proper soil cultivation and shading are carried out to make the tender buds and flower buds soft and brittle, thus improving the quality.
Topdressing: Generally topdressing is 3 times. The first time was in spring, when the height of new shoots was 13 ~ 16cm, human manure was applied at 3.0× 104kg/hm2 to promote the rapid growth of aboveground stems and leaves. The second time, when the leaf sheaths were fully developed in the middle and late May, 450kg/hm2 urea was applied. For the third time, urea 300kg/hm2, calcium superphosphate 300kg/hm2 and potassium sulfate 600kg/hm2 were applied in the middle of June to promote more flowering.
Drainage and irrigation: planting in high dryland. During the high temperature and drought period from August to September, it is necessary to water or water in time to facilitate the growth of flowering plants. Underground stems are not tolerant to waterlogging, irrigation should be moderate, and the border surface should not be submerged by water. Otherwise, the underground stems will rot easily. Drainage should be done well when it rains for a long time. When the rain stops, there will be no water in the ditch.
There is no need to grow it in the greenhouse.