在贵州省海拔2,200公尺的威宁草海边,蕴藏有丰富的草炭(泥炭)。威宁草炭是古代地层变动时,海中的水生植物(木贼,莎草科植物)为淤泥所淹埋后在压气状态下形成的。共分三层:30～50厘米为黄灰色粉沙粘土所复盖;50—150厘米为分解完全的呈深黑色的腐植质层,农民称为“海土盖子”或“黑海土”;150—350厘米为半分解的呈黄褐色的有机质层,植物残体尚清晰可见,农民称为“黄海土”。草炭虽然是很好的有机质肥 Weinhaicao, 2,200 meters above sea level in Guizhou Province, is rich in peat (peat). Weining peat is the formation of ancient strata, the aquatic plants in the sea (Equisetum, Cyperaceae) was buried in the mud after the formation of the state in the gas pressure. Divided into three layers: 30 to 50 cm for the yellow-gray silt clay covered; 50-150 cm to decompose completely dark black humus layer, peasants called “sea cover” or “Black Sea soil ”; 150-350 cm semi-decomposed organic layer of yellow brown, plant residues are still clearly visible, farmers called “ Yellow Sea soil ”. Although peat is a good organic fertilizer