What is the significance of plant leaf in life?Great.Leaves have done their job of providing nutrients to the tree throughout the spring and summer and can now leave.
What is the significance of plant leaf in life?Important.If the leaves remain on the tree or shrub, it will serve the cause of their death.
What is the significance of plant leaf in life?Philosophical.Leaves die and make room for new growth.
What is the significance of plant leaf in life?Aesthetic.Falling leaves - the most beautiful phenomenon in the world of trees.
Autumn Leaves
most shrubs and trees change color and fall off.They seemed to vie in beauty.But plants such as alder, poplar young, lilac, leaves to freeze the color does not change and remain green.And the first snow blacken.
Some herbaceous representatives - pansies, wild radish, shepherd's purse, annual bluegrass - bloom until late fall.
periodic phenomena, such as flowering and falling leaves, the plants are caused by seasonal changes.
Winter
In autumn all life preparing for winter.Plant life also fades.They winter in a state of rest - do not grow, do not eat, do not live to the full, but there are.And with the coming of spring and the beginning of sap flow plants get new strength and revived.Survive the longest period of peace made possible by the supply of nutrients, which "took care" including the leaves.With the onset of cold weather, they become unnecessary plants.Moreover, they can cause death.
Leaves evaporate moisture in the summer and would do it in the winter (as drying clothes in the cold).Thus, they have dried wood, and it would be doomed.Leaf fall in the life of plants is vital.Protect themselves from drying out and death of trees and shrubs shed their dead parts before the onset of cold weather.
Autumn leaves falling off before they give nutrients to the plant.At the base of petiole formed a cork, and it dies.Then separated from the branches under its own weight or by a gust of wind.Leaf fall in the value of plant life can not be overestimated.Without it, he would have perished a huge part of the flora, leaving only coniferous and tropical specimens.
Evergreens
They are characterized by constant color of leaves.This does not mean that they live forever.In evergreen leaf crops it allows the plants to be constantly updated.They lose the dead parts throughout the growing season, as a man hair.In evergreens the old leaves fall off.Younger preserved unchanged color.
Tropical evergreen plants characterized by leaves, the length of the growing season which is a few years or months.Though there are instances in the short time remaining with bare trunks.
How many live leaves
Their life expectancy varies and can range from 14 days to 20 years.Leaves perennial plants in comparison with the roots and stems of live significantly less.This is due to the fact that they work very actively and are unable to be updated.
have evergreens central Russia, such as spruce and pine needles fall off in 5-7 years, and the first 2-4 years for the second.
duration of leaf fall also varies.In birch this period lasts about two months, and linden enough just two weeks.
Why do leaves change color
The fact that the tree is ready for the winter, it becomes evident from the color change of leaves.They are great in their wilting - yellow, red, brown, orange, with a variety of transitions and shades.It becomes sad when all this beauty flies and covers a carpet the ground.
Falling Leaves - a biological process, which lies in the life and development of plants.Reduces the intensity of intracellular processes (photosynthesis, respiration), decreased nutrient content (ribonucleic acid, nitrogen and potassium compounds).Hydrolysis begins to prevail over the synthesis of substances, cells accumulate decay products (calcium oxalate).More valuable plastic and mineral compounds from the leaves of the plants go to the store.
Most shrubs and trees in autumn become crimson and yellow.Red shades are due to the accumulation in the cells of the pigment anthocyanin, reacting to acid, and change the color to purple hue.In an alkaline environment, it would be a blue-blue.
yellow leaf color depends on the pigments (carotene, xanthophyll) and the cell sap (flavones).That's very prosaic, explained the beauty of the autumn forest.
Fertilizer
role of leaf fall in plant life is very important.It protects the roots from freezing.Lush forest floor due to the looseness and the presence of a large amount of air reduces the thermal conductivity of the soil and prevents it from deep freezing in the winter.
In addition, it is sufficient water capacity, which is important for the plants.Fallen leaves serve as mulch material, protect the soil from erosion and prevent the formation of crust.Humus, they improve soil structure and attract earthworms.
Fallen leaves are a valuable organic fertilizer containing phosphorus, potassium, calcium, nitrogenous substances and useful microelements.Thus creating favorable conditions for plants.In the forests of huge trees grow without making any fertilizer.
fallen leaves in the garden
modern gardener does not appreciate the peasant past experience.It annually burns as fertilizers and structural material, as would be enough and compost, and mulching.Some gardeners do not save the leaves of ignorance, others are afraid of the spread of infections.But if you approach this issue wisely, all their fears were groundless.
fact that pathogens are killed when ripe compost and recycling its earthworms.Consequently, the leaves of fruit crops it is expedient to lay to produce humus and healthy pillow from under the birch, linden, chestnut, maple and others. Leave for mulching next summer.
shelter of this kind will be the salvation of valuable plants in the snowless winters.For example, strawberries, daffodils, new plantings.
spring fallen dry leaves, you can mulch the planting of peppers, eggplant and tomatoes in greenhouses and greenhouses.This culture requires dry air and moist soil.A thick layer of dry leaves will create the necessary climate, will become an obstacle weed growth, and the summer will delight Autumn landscape in a single greenhouse.
Early Harvest
Valuable properties of leaf fall can be used for the cultivation of early crops of vegetables (cucumbers, potatoes, cabbage, onions and so on.) Or accelerated planting strawberry bushes and flowers.Since autumn shallow prepared for bayonet shovels, trench.Then fill them healthy fallen leaves and shed a solution of liquid manure.On top lay juicy cabbage leaves, the tops of root crops, and so on.. In this way leave the trenches for the winter.Excavated earth left near a ridge.
During the winter settles the contents of the trench, fed with melt water and sealed.Land in the ridge under the bright sun thaws and warms up faster.As soon as the soil in the trench roller raking and planted early vegetables.You can build a small film tunnel over young plants to protect them from frost.
