The Effect Of Heavy Metals To Plant Growth And The Research Of School Lawn Ecological Diversity

Due to the environmental, economic, social and legal factors, excessivesludge treatmen In recent years, heavy metal pollution has seriously affectedpeople’s normal life. In this experiment, we choose rape, lettuce and cabbageseeds for the study. It’s used to study the affect of its germination rate, seedlingheight, root length, weight and chlorophyll content to different concentration ofcr³⁺and stress time. The results show that: with the concentration ofcr³⁺increasing and stress time extending, its toxic effects on the seedlings becamemore obvious. The cr³⁺can inhibited the the corn seedling height, root length,fresh weight and dry weight significantly; it can also suppressed the chlorophyllsynthesis, low concentrations of chromium can stimulate the growth of youngroots, high concentrations of chromium can inhibited its performance. This studylaid a good foundation on the development of eco-agriculture.In the article we had also assessed the ecological diversity of the school lawnand have token the ryegrass lawn to study different habitats ryegrass communitybiodiversity factors （human disturbance and light）, light harvesting on the campuslawn and the species composition characteristics of ryegrass turf. After the aboveresearch, it can made a good foundation for the eco-green construction of ourschool.