90 ~ 120 days from sowing to harvesting. Among them, 50-70 days from sowing to initial flowering and 45-60 days from harvesting.
Like wax gourd, the growth and development process of Chih-qua can be divided into seed germination stage, seedling stage, vine-pulling stage and flowering and fruiting stage. In a suitable season, the germination period of seeds is about 5-7 days. Cucurbita pepo seeds germinate easily. Generally, soak the seeds in warm water at 40-50℃ 10- 15 minutes. After the water temperature drops to room temperature, the seeds are soaked for about 5 hours, and the seeds germinate at about 30℃. They began to germinate after about 36 hours, and most of them germinated after 48 hours.
After the seeds are germinated and sown, the temperature is about 25℃, and they are unearthed neatly, and the leaves are unfolded in 4-5 days. If the temperature is about 65438 05℃, cotyledons can spread for more than 65438 00 days. At this time, cotyledons are small and thin, and the utilization rate of light energy is low, which is extremely unfavorable to the normal growth of plants. The growth period of litchi varies with different cultivation seasons and techniques. The growing season of melon is the longest in Spring Festival, slightly shorter in summer and the shortest in autumn. Proper cultivation management can prolong the growth period, especially the flowering and fruiting period, and increase the yield.
The flowering and fruiting of litchi are closely related to the growth of plants. During the growth and development of Chigua, the leaves of vines are growing. The basic trend of vine leaf growth is: slow growth before seedling stage, accelerated growth at vine-pulling stage and rapid growth at flowering and fruiting stage. Among them, the first fruit-bearing period is the fastest, and then the growth rate gradually decreases (see table). It can be seen that the vine leaf growth of zucchini has only a preliminary foundation before flowering and fruiting, and will develop and grow after flowering and fruiting. Judging from the functional leaves in different stages of Chieh-gua, when the seedling stage is 7 leaves, the main functional leaves are 2-5 leaves; There are 1 1 leaves at the vine pulling stage, and the main functional leaves are the third to eighth leaves; After flowering and fruiting, the flowering period is 28 leaves, and the main functional leaves are the 3 rd to 24 th leaves; Results There were 39 leaves in the early stage, 5-33 main functional leaves and 54 leaves in the full fruit stage. The main functional leaves are the 8th to 45th leaves, that is, the 5th to 40th leaves are the main functional leaves in the flowering and fruiting period. The growth and assimilation efficiency of these leaves are closely related to flowering and fruit yield.