Compare the growth process of tomatoes and cucumbers, and tell me what they have in common.

The roots, flowers, fruits and seeds of tomatoes are all reproductive organs. Cucumber roots are relatively shallow, generally about 20 cm underground, and its ability to absorb water and nutrients is not very strong, so it must be watered frequently. At the same time, cucumber requires high temperature and light, poor waterlogging tolerance, high stems and vines, thick leaves and likes to grow up.

The whole life of cucumber, from seed germination to new seed formation, the plant naturally aged and died, which lasted for 90 years. 130 days, the elderly can reach 300 days. It goes through four completely different growth stages: seed germination stage, seedling stage, rattan stage and fruiting stage. (1) The germination period is about 8? 10 days, the fastest is about 5 days.

The nutrients needed in the germination period of seeds depend on the transformation of nutrients stored in seeds. The conditions that affect this stage are: first, the quality of the seed itself, that is, the fullness of the seed, the length of storage time and its own germination rate; Second, whether the temperature, humidity, oxygen and nursery environment required for seed germination are appropriate; Other techniques such as artificial seed soaking and germination acceleration also directly affect the progress and effect of germination period.

During this period, high temperature, high humidity and sufficient light should be given, and plastic film mulching can be used where conditions permit. After emergence, fertilizer and water management should be carried out in time to cultivate strong seedlings and prevent white growth. (2) The seedling stage extends from cotyledons to the ground, fully spreading to 4? The colonization period of 5 true leaves lasted for 30? 40 days

In spring, when the first true leaf is spread out, the seedling tip has differentiated into 16 leaves, and the leaves below 12 leaves have completely differentiated. When the seedling has three leaves, the seedling has differentiated into 22 true leaves, and the floral organ differentiation has been seen in the axils of 15 leaves, indicating that different organs have been differentiated at this stage.

(3) The vine-pulling period is also called the vine-throwing period or the early flowering period, which starts from 4? Five true leaves experienced the appearance of the first female flower, opened and settled in the first melon for about 25 days. At this time, tendrils appeared in most varieties from the fourth quarter, internodes became longer, vines grew faster, some varieties appeared lateral branches, and female flowers and male flowers appeared and opened one after another.

When the stem of the root melon changes from yellow-green to dark green, that is, the "black stem", it means that the root melon has stabilized and the vine pulling period is over. The growth state of cucumber plants at the end of vine-pulling period, the plant height has reached about 1 m, the cotyledon growth has reached the maximum, and the taproot depth has reached 40? 50 cm, 10 above the true leaves, the first female flower opens, that is, the root melon turns to "Hei Bang". At this stage, plants grow, while stems and leaves mainly grow, and flower buds continue to differentiate, marking the transition from vegetative growth to reproductive growth.

Plants have changed from vertical growth to creeping growth, so they should stand upright in time in cultivation management. In the post-pulling stage, the excessive growth of nutrients should be properly controlled by controlling fertilizer and water. The fruiting period is from the first fruiting, continuous flowering and fruiting, plant senescence, to seedling pulling, and the duration varies with different cultivation methods.

The cultivation mode of early Spring Festival Evening and autumn lasts for 40 years. 60 days, the long-season winter planting pattern can last for 6? Seven months. At this stage, the leaves, tendrils, lateral vines, stamens and pistils of each node of the plant grow and form one after another, the growth of leaves and leaf area of the main vine is maximized, the growth speed and number of vines are also large, and the probability of female flowers appearing and opening is increased. Once the female flowers set fruit, the growth rate of young melons is also the fastest, and the daily growth of long melons and thick melons increases.