Soil Organic Matter,Total Nitrogen and pH in Sugarcane Farmlands at Different Altitudes

Aimed at understanding the effect of altitude on soil organic matter, total nitrogen and pH in sugarcane farmlands, we collected 1 740 soil samples from Lincang City, the largest sugarcane planting area in Yunnan Province, and analyzed relevant parameters. The result showed that soil organic matter was significantly correlated with altitude(γ=0.156^**, p<0.01), which increased with altitude elevation, while total soil nitrogen and pH were not correlated with altitude. Average content of soil organic matter was 25.6 g·kg^-1, ranging from 0.3 to 79.1 g·kg^-1 with 41% of CV; average content of total nitrogen was 0.120 g·kg^-1, ranging from 0.117 to 0.122 g·kg^-1 with 44% of CV; average pH was 5.3, ranging from 3.6 to 8.6 with 15% of CV.