Effects of farming behaviors on soil quality in small karst basin

Selecting Maodong small basin, Puding county, as a study area, we collected and analyzed the soil sample from different farming area influenced by different and long-trem farming method,which include dry-land in low multiple crop index,dry-land in high multiple crop index and composite-land in high multiple crop index.The results show,under the long-trem influence of different farming behaviors,the soil, collected from dry-land in low multiple crop index to dry-land in high multiple crop index to composite-land in high multiple crop index, decease in bult density, clay content,total P and activities of catalaes and increase in organic matter, humic acid contents, nitogen,available nitrogen, phosphorus, potassium, soi breathe intensity and urease, phosphatase, protease active content. C1uster analysis prove that preserving abi1ity of moisture and fertility and providing abi1ity of ferti1ity of the soil are best in high mu1tiple crop index but worst in low mu1tiple crop index. The above conc1usions show that the behavior of the farmer affects the soil quality to some extent。