Question

2 mins speech on afforestation and it's impact​

Answer 1

Answer:

Grassland afforestation, occurring in many parts of the world, can modify the nature and transformations of soil organic carbon and associated soil properties, which in turn can affect plant diversity and ecosystem function. Afforestation area has grown rapidly over the last few decades in the semi-arid grasslands of the Qilian Mountains in northwestern China in an effort to restore mountain vegetation. However, ecological consequences of this land use change are poorly known. We investigated the effects of grassland afforestation on plant diversity, soil properties, and soil organic carbon and nitrogen storage at the soil depth of 0–70 cm. Our results showed that afforestation decreased percent cover and aboveground biomass, and increased plant diversity of herbaceous community. Afforestation also decreased soil bulk density and pH, and increased soil water content. Generally, afforestation favored an increase in soil organic carbon, total nitrogen, and organic carbon storage, and resulted in a significant increase in total phosphorus in the surface soil (0–5 cm), although a slight decrease (P > 0.05) was observed in the subsoil. In addition, afforestation significantly increased soil C:N ratio in the upper soil. Results of this study demonstrate the potential for afforestation to increase soil organic carbon and nitrogen storage in semi-arid grasslands of Qilian Mountains. This has important implications for C sequestration in this area.

Answer 2

Afforestation is the establishment of a forest or stand of trees (forestation) in an area where there was no previous tree cover.If not properly managed, afforestation can result in a reduction of local biodiversity, the modification of particular biomes, the introduction of non-native and potentially invasive species, reduced stream flow, and lost revenue from agriculture.Reforestation can be used to rectify the effects of deforestation or improve the quality of human life by soaking up pollution and dust from the air, rebuilding natural habitats and ecosystems, mitigating global warming since forests facilitate biosequestration of atmospheric carbon dioxide, and harvesting for ...

Measures to promote Afforestation

• Regulation on the cutting of trees. ...
• Controlling forest fires. ...
• Increasing the percentage of land area under afforestation. ...
• Training the public on the importance of tree planting. ...

Environmental benefits

Planting trees in a depleted or recovering forests helps to restore the ecosystem of the area, but planting trees in a barren land helps to create a new ecosystem. Most governments and institutions have used afforestation to help revert the arid and semi-arid areas to productive areas.Afforestation makes the Earth a better place by reducing the carbon footprint or carbon dioxide in the atmosphere. Planting more trees increases active carbon sinks that absorb and store carbon from the earth.

Government involvement in afforestation.