Presentation for the plant lesson in winter. "Amazing in the natural world in winter" "Changes in the life of plants in winter" was made by a group of "researchers" - presentation. covering material for plants for the winter
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In order to find out how the plants on our experimental site look like in winter, what features of their structure help to survive frosts and snowfalls, we decided to tell you a little about the climate in our city, since it greatly affects the vegetation cover.
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Features of the climate in Kamchatka
The climate in Kamchatka is maritime monsoon. It has some special features. The first feature is that we have a large amount of precipitation.
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The second feature is strong winds, often changing their direction, hurricanes and even storms.
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The third feature is the frequent variability of the weather in all seasons of the year, especially in winter.
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The fourth feature is a long snowy winter and a short cloudy summer. In this regard, the vegetation in Kamchatka is unusual and peculiar.
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On December 1, the guys from our class and I went to the Lesok experimental site. Each was given the task, through observation and reflection, to discover how the plants had adapted to the winter.
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Our Observations Winter is not only a cold but also a dry season. In winter, plants face dry air and soil. Therefore, plants have various adaptations to reduce winter evaporation. One of these adaptations is leaf fall, due to which the evaporating surface of the plant is many times reduced. From all the trees and shrubs growing on our experimental site, the leaves have long fallen.
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Some plants of our flora overwinter with green leaves. Among the trees and shrubs, we know spruce, pine, fir, cedar elfin - evergreens. The leaves of these plants are needle-shaped, hard, leathery, have a small surface and weakly evaporate water. Thanks to this, they successfully endure the winter drought.
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(Veronica, cuff) form creeping shoots with buds located at the very surface of the earth. These shoots and buds are well protected by a large cover of snow from severe frosts. On our site, we found plants that go under the snow with green leaves and keep them until spring. Such plants are called winter green. Some winter green plants
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Plants whose buds are high above the ground have additional adaptations. Already in the middle of summer, wintering buds are laid on the tops of the shoots and in the axils of the leaves, protected by dense leathery scales. We cut several branches with such buds, brought them to school and put them in the water for further observation.
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We noticed browning of the originally green branches of some of the plants growing in our area. This indicates that a layer of cork has been laid under the skin, which additionally protects the plants in winter.
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Slides captions:
ENVIRONMENT UMK "HARMONY", 3rd CLASS E.V. MARCHENKO MBOU secondary school No. 3 Krasny Sulin, Rostov region PLANTS IN WINTER. HOW DO TREES GROW?
BEWELLED BY THE enchantress in WINTER, THE FOREST STANDS - AND UNDER THE SNOW FRINGED, STILL, Mute, WONDERFUL LIFE IT SHINES. F. TYUTCHEV
WHAT IS SNOW COVER FOR PLANTS? SNOW COVER HELPS PLANTS SURVIVE THE WINTER.
ROWAN BERRIES WILL BE SWEETER FROM THE FROST.
HOW DO TREES WINTER? BIRCH FIR
THE TRUNK OF ANY TREE IS COVERED WITH BARK. THESE ARE DEAD PLANT CELLS, WATER AND NUTRIENTS ARE NO LONGER ACCEPTED BY THEM. THE BARK PROTECTS THE BANK FROM DAMAGE, FROM HEAT AND FROM FROST. THE THICKNESS OF THE BARK CAN REACH UP TO 30 CM.
HOW TO HELP THE TREES IN THE WINTER?
HOW DO TREES GROW? THE PINE TRUNK GROWS BY 2-3 CM IN ONE DAY. MOST OF ALL THE WOOD GROWS IN THE MORNING AND IN THE EVENING. AT NIGHT THE TREE RESTS AND ALMOST DOES NOT GROW. TREES GROW FROM MAY TO JULY. FASTEST IN JUNE. THE WINTER TIME IN THE LIFE OF TREES IS CALLED THE STATE OF REST. THEY DO NOT GROW UNTIL SPRING.
HOW TO KNOW HOW OLD IS A WOOD? IN THICKNESS THE STUFF GROWS SLOWER THAN IN HEIGHT. ABOUT 2-3 CM THE BANK IS THICKEN PER YEAR. ANNUAL RINGS CAN BE CONSIDERED ON THE SAW OF THE WOOD OR ON THE STUMP. BY THE NUMBER OF RINGS YOU CAN DETERMINE HOW MANY YEARS THE TREE IS.
OAK CAN LIVE UP TO 2000 YEARS. MAPLE CAN LIVE UP TO 500 YEARS.
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... Not dead and not alive ... Bewitched by the enchantress in winter, the forest stands - And under the snowy fringe; Motionless, dumb. He shines with a wonderful life. And he stands bewitched, - Not a dead man and not alive - sleep magically enchanted. All shrouded, all shackled With a light downy chain ... F. I. TYUTCHEV
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