(10 points) "Stony desertification" stands for stony desertification. It mainly refers to humid karst areas in the subtropics, where the soil is severely eroded and the bedrock is exposed in large are

(10 points) "Stony desertification" stands for stony desertification. It mainly refers to humid karst areas in the subtropics, where the soil is severely eroded and the bedrock is exposed in large areas.

(1) Reasons: ① This area has developed karst (karst) landforms and the soil layer is thin; ② The vegetation coverage rate is low;

③ Precipitation is concentrated, Lots of rain. (2 points for each point, ***6 points)

(2) Measures: ①Use biological measures combined with engineering measures to vigorously implement the project of returning farmland to forest and grassland;

② Take comprehensive measures to solve the energy problem in Shishan District in multiple ways;

③ Combining population growth control with ecological migration;

④ Adjust the agricultural production structure and regulate agriculture, forestry and animal husbandry. relationship between land uses.

(1 point for each point, ***4 points, points may be awarded if the answer is reasonable)

(1) This question examines the causes of rocky desertification main reason. Guangxi has developed karst landforms with thin soil layers; low vegetation coverage; concentrated precipitation and frequent heavy rains. When soil erosion occurs, it is difficult for vegetation to recover.

(2) This question examines the prevention and control measures of rocky desertification. Biological measures should be combined with engineering measures to vigorously implement the project of returning farmland to forest and grassland; comprehensive measures should be taken to solve the energy problem in Shishan District in multiple ways; population growth should be controlled in combination with ecological migration; agricultural production structure should be adjusted, and agriculture and forestry should be regulated. , the relationship between grazing land.