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1 我国土壤缺镁状况地壳中镁的平均含量为 2 3 5 % ,而土壤中镁的平均含量只有0 6% ,这是由于镁易被淋溶的结果 ,我国北方土壤平均含镁量 1% ,南方土壤平均含镁量为 0 5 % ,所以南方土壤比北方土壤更加缺镁。全国土壤普查结果表明 ,我国土壤缺镁严重 ,缺镁土壤面积达5 5 3
1 China’s soil magnesium deficiency The average content of magnesium in the crust is 23.5%, while the average content of magnesium in soil is only 0.6%, which is due to the leaching of magnesium as a result. The average soil magnesium content in northern China is 1% , The southern soil average magnesium content of 0 5%, so the southern soil is more magnesium than the northern soil. The results of the national soil survey showed that the soil in our country is deficient in magnesium and the area of magnesium deficient soil is up to 5 5 3