Knowledge of jasmine harvesting

The flowering period of jasmine varies according to the climatic conditions of the region. Generally, when the monthly average temperature is above 20 ℃ and the daily temperature is above 30 ℃, a vigorous harvest period will be formed. During the flowering period of a year, jasmine flowers will form a wave-like "flower season" of 3murs and 4 waves. Each "flower season" has a prosperous yield day of about 7 days, which is called "flood". Before or after the "flood", it is called "small water". The difference of daily output between big water and small water in flower season is 10 times, and the interval of "flower season" is about one month. For example, the "flower season" in Hengxian County is divided into:

Spring flower season: that is, the first flood of the year, usually in April or May, accounting for about 15% of the annual output.

Baihua season: the second flood of the year, usually from June to July, accounting for about 30% of the annual output.

Fuhua flood: the third flood of the year, usually in August, accounting for about 30% of the annual output.

Autumn flower flood: the fourth flood of the year, usually from September to November, accounting for about 25% of the annual output.

In terms of quality, due to high temperature, strong light, rain and heat in the same season, and sufficient water, summer and summer flowers have many buds, large buds and the best quality, which can best reflect the characters of the varieties. Due to the lower temperature and less nutrient accumulation, the quality of spring flowers is slightly lower than that of summer and summer flowers. The quality of autumn flowers is the same as that of summer and summer flowers in the early stage, and the quality is slightly lower in the later stage because the weather gradually turns cool. The jasmine flowers in spring and autumn are small and yellow, so it is difficult to open and spit out fragrance.

Collecting flowers is the purpose of jasmine cultivation. The harvest time and standard have great influence on the yield and quality of jasmine. The harvest standard of jasmine is that the picked flowers can open and spit out fragrance that night, and those that can open and smell are called "day flowers"; the immature flowers picked early before reaching the standard of "day flowers" are called "green buds"; the flowers that are already in bloom at the time of picking are called "white flowers". The collected "green buds" will not open and spit out incense, so they have no economic value, while the "white flowers" most of the aromatic oil has volatilized naturally, and the economic value is not great. Only the budding "day flower" is the object of harvest.

The main characteristics of "day flower" are: the flower is full and white, the stem is long, that is, the Corolla is long, and the Corolla is far away from the calyx. The characteristics of "green bud" are: the flower is not full, the bud is small, the color is not white and bluish yellow, the Corolla is short, and the Corolla is close to the calyx. Although there is an obvious difference between "day flower" and "green bud", if the flower is picked too early (for example, the sun has not yet risen or just set, 6: 00 am or 8: 00 am), or the temperature is relatively low, it will often be difficult to distinguish, resulting in missed or wrong mining, resulting in losses. So make a careful distinction when picking. The harvest time should be arranged reasonably and picked at the right time. In theory, the suitable harvest time is at 2: 00 p. M., because the "same flower" in the afternoon has fully matured and has a high content of aromatic oil. But it is often too late to pick jasmine flowers in the afternoon, so jasmine harvesting is usually brought forward to after nine o'clock in the morning or at noon. The jasmine after harvest should be protected from extrusion damage and should be sent to the scented tea processing plant in time for maintenance.