Alfalfa is suitable for planting in spring and autumn, the spring temperature is low, the rain is relatively abundant, but the rainfall is not large, so in this case, the alfalfa we sow is mainly to control weeds; Autumn is drier and rainfall is relatively less, so sowing alfalfa at this time is very good quality with watering because there are fewer weeds. Alfalfa is perennial, has a certain drought resistance, likes water and fertilizer, can maintain a high yield for about 5 years when planted, does not need to plough again, only needs to do proper water and fertilizer management every time it is harvested, and can always maintain input and output.
As long as the right variety of alfalfa is selected, it can still survive the summer well in the south, and the autumn dormancy grade of alfalfa represents its growth rate, cold tolerance and heat tolerance, but if you choose a low autumn dormant alfalfa, there is very little yield in the south. Many of the high-yielding alfalfa and selected alfalfa that we usually see on major platforms are mostly two-level or three-level autumn dormant, because our Gansu Inner Mongolia and Xinjiang have large areas of alfalfa planting, so they will produce a large number of seeds, which are very cheap. However, it is mainly suitable for planting in the Qinhuaihai Basin, and there are no good large-scale breeding domestic varieties in the south of Qinhuai.
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Then alfalfa, which is suitable for sowing in the south of Qinhuai, mainly relies on Australia's imports, and the production of these seeds is very small, so the cost is relatively expensive; At present, the suitable varieties in the Yangtze River basin must at least achieve 8-10 autumn sleep, and there is no variety in the country that can do it, so it purely depends on imports.
For such a high autumn dormant alfalfa, it has a higher growth rate and better heat tolerance, so it can have good survival performance and abundant yield in the Yangtze River basin and the south. If you buy some alfalfa with two-level or three-level autumn dormancy on the platform, it is easy to die due to too much rain in the south and overheating in summer, and at the same time, the regreening rate is relatively slow, so the yield is low.