The scavenger season has important implications for nutritional growth, reproductive growth and yield. The minimum temperature at which the seed sprouts occur is 1 °c ~ 3 °c, less than 1 °c, and the most suitable temperature is 20 °c ~ 25 °c. The suitable planting period is the first day of 2°c stabilization of the average daily temperature of the spring day, with 5-10°c stabilization of the topsoil soil temperature, the later the seeding, the higher the temperature and the lower the yield, it should be broadcast early and in accordance with the prevailing climatic conditions. Early and timely broadcasts allow the muscular individuals to be adequately nourished for long periods of time and contribute to the development of roots and the improvement of drought resilience. The old saying, “turkish scavengers, with their seven shares, and lisummer scavengers, with their flowers blooming after autumn”, amply illustrates the benefits of early and timely broadcasting. Seeding should not be too early or too cold, affecting seed growth and seedlings, such as in “spring cold” weather, which can result in large areas of scavengers and dead seedlings; and late planting and shorter reproductive periods, which can result in fewer flowers and lower yields. At the same time, because climate conditions are not identical everywhere, the timing should also be flexible. If seeding is too late, the seedlings will grow at higher temperatures, so that parts of the ground grow faster than the underground part, have less roots and are less resilient to drought, especially during the flowering of the present bud, and are vulnerable to drought. In some cases, haemorrhagic drought can make full use of recalcitrant water released from the soil and increase the rate of seedlings; drought can also cause the last night frost hazard; and drought can prolong the growth of seedlings for long periods, allow nutrients to grow adequately and create good conditions for the flowering of post-frozen spasms。
When the seedlings of the mussels are released, they are not ice-resistant, and a freeze occurs at 2°c, but after two pairs of real leaves they are able to withstand the lowest temperatures on the ground at 5°c. Therefore, local broadcasting periods should be determined in accordance with weather conditions and the temperature requirements for lumbering, growth and development. In mid-april, planting was carried out in the sub-prefecture of the inner mongolia and in early may in the north。
The planting is premature, the seedlings are vulnerable to freezing and are exposed to a “sniffing drought” that results in a reduction in production at a very rapid rate. The late planting of seedlings and the emergence of seedlings at high temperatures and during the rainy season are intertwined with nutritional growth and reproductive growth, which are detrimental to the formation and accumulation of dry matter and are prone to corruption and fallback, resulting in reduced production。
