The evolution of the concept of nature has gone through a long process. At last, we realize that everything is universally related and develops forever, so we should look at the problem from a developmental perspective. At ordinary times, we should think about problems from the perspective of dialectics, correctly apply the three laws of unity of opposites, mutual change of quality and negation of negation, and start from reality to discover laws and truths, so as to promote the coordinated and sustainable development of people and society.

Just like the evolution of the concept of nature, the generation of truth is often not achieved overnight and requires a long process. The determination of truth is a long-term historical process, not once. Since Nicholas first engaged in plant research, he proposed that some processes of plants absorbing nutrients and water from soil were related to the wicker experiment in Helmont, and attributed the weight gain to water. Although these conclusions were later proved to be wrong, scientific experimental methods have been gradually introduced into research. /kloc-At the beginning of the 9th century, Thiel's humus nutrition theory prevailed. He believed that fertility depended on humus content, humus was the only nutrient, and minerals played an indirect role. Later, Justus von Liebig denied humus theory, put forward mineral nutrition theory, nutrient return theory and minimum nutrient law, but he still didn't realize the relationship between nutrients, making their functions independent. All these scientific conclusions have been confirmed in practice. After repeated denials, scientific conclusions have been proved and gradually become correct.

In our scientific research, we should understand that the material exchange and energy flow in nature are always going on. Only by maintaining balance can we maintain the normal operation of the earth's large ecosystem, and it is harmful to break either side. At present, with the increasingly obvious ecological crisis and declining environmental quality, the importance of studying plants has gradually emerged, occupying an irreplaceable position in human life. According to the actual situation of plants, provide them with favorable conditions, promote their healthy growth and development, use plants to purify the air and conserve water, and serve the ecological construction.

In the future work and study, we should develop good thinking habits, get in touch with the theoretical knowledge of dialectics of nature, actively apply the theoretical knowledge of dialectics of nature to scientific research, look at problems scientifically, solve problems, learn lessons, sum up experience, constantly improve ourselves and contribute to social development ~