In the past, people were accustomed to writing in vertical lines from right to left. The traditional couplets followed this rule, but things have changed. Sometimes people don't follow the rules, and they even make mistakes. Here is the way to read Spring Festival Couplets: First, look at the horizontal scroll. If the four characters are written from left to right, the upper scroll will be on the left and the lower scroll on the right.
The input of water cannot estimate photosynthetic rate, since it is also used in transpiration. The parameter that you chose to measure depends on your resources and the accuracy required of your estimates. There are instruments that measure the input of CO2 and output of H2O, called Photosynthesis Measurement Systems.
Three factors can limit the speed of photosynthesis-light intensity, carbon dioxide concentration and temperature. Light intensity. Without enough light, a plant cannot photosynthesise very quickly, even if there is plenty of water and carbon dioxide.Increasing the light intensity will boost the speed of photosynthesis.Carbon dioxide concentration. Sometimes photosynthesis is limited by the concentration of carbon dioxide in the air. Even if there is plenty of light, a plant cannot photosynthesise if there is insufficient carbon dioxide.Temperature. If it gets too cold, the rate of photosynthesis will decrease. Plants cannot photosynthesise if it gets too hot.ncreasing the light intensity will boost the speed of photosynthesis. Carbon dioxide concentration. Sometimes photosynthesis is limited by the concentration of carbon dioxide in the air. Even if there is plenty of light, a plant cannot photosynthesise if there is insufficient carbon dioxide.