How does a plant drink water?

Plants consume an enormous amount of water. For some 100 days of spring crop development, they absorb water in an amount equal to 300500800 times their dry weight. After all, this is a continuous stream of water - a fountain! In addition, each plant emits continuous and invisible jets of water vapor into the air. Therefore, I wonder how the plant drinks water?

Therefore, I wonder how the plant drinks water?

To imagine the whole mass of water that plants drink and emit into the air, it is enough to figure out how much water takes a crop from any area and evaporates it at some time. If you take, for example, a yield of 4 tons of grain per hectare (16 tons of the total crop with straw and roots), water consumption in such a crop during growth will be approximately 4800 tons per hectare (1/2 tons per square meter). Half a ton, or 1/2 cubic meter, per square meter of water will make up a layer of 1/2 meter height. This means that plants drink a half-meter-long layer of water over the summer (approximately knee-deep).

And almost all of this water plants emit into the air for any 100 days, and if you count only the time of solar lighting and heating, then in about 1000 hours. Therefore, from 1 square meter the yield per hour evaporates about 1 liter of water. And our comparison of the plant with the fountain is quite justified. But, if the plant drinks water with such speed, then is it possible to see it? Of course, you can.

When growing plants in a bottle, it is only necessary to carefully follow the water level in it, and you can see that it goes down. Lowering the water level in the bottle is slow and almost imperceptible to the eye. But nothing makes it more noticeable. It is only necessary that the bottleneck be possible already, and then the lowering of the water level will accelerate. To do this, you can also insert a thin long tube into the neck, install it horizontally, and fill the plug for tightness. On this tube, the water will run into the bank quickly enough, which can be clearly seen.

There is no need to grow a plant in a bottle, but you can take any single stem with a woody stem, dug out the roots, wash it very carefully from the ground and place it in a jar with plain water. To do this, take a bottle with a wide neck and fit a cork to it, which is cut in half and a semicircular groove is cut out in the center of both of the ladles for clamping the plant. In addition, in both halves of the tube is drilled through the hole for the glass tubes.

In both drilled holes in the plug is inserted into a small glass tube, one of which should not extend beyond the bottom edge of the tube. After that, the cork is thoroughly smoked over all the cracks with cotton wool and filled (for tightness) with wax, paraffin, lard or clay. The latter should not be hot, so as not to burn the trunk of the plant.

When the pot hardens, it is attached to a glass tube in a tube with a rubber tube to one funnel, and to another another possibly a long glass tube with a narrow opening, placing it horizontally on some supports. After this, water is poured into the bottle through the funnel until the entire bottle and the entire long tube are filled.

As soon as the tube is filled with water to the end, the rubber is clamped under the funnel, and now the water "runs" through the tube to the jar, as the plant drinks water from it. The more leafy the plant and the thinner the tube, the faster the water will run through it. When the water in the tube reaches the jar, you can pour a little water from the funnel by opening the clip on the rubber, then the long tube will be refilled with water, and as soon as the rubber is clamped, the water will run through the tube again. This can be repeated any number of times. Thus, it will be clearly and distinctly visible how fast the plant is drinking water, and it will be possible to get an idea of the enormous consumption of water by the plants.

Tools