Distribution Characteristics of Soil Nutrients of Different Land use Types in Small Heping Watershed of Ya'an Region

Key words: 
• Small Heping Watershed /
• Land use /
• Eriobotrya japonica woodland /
• Soil nutrients

Abstract: To explore the soil nutrients distribution of different land use types, studies were made of the soil nutrients of Eriobotrya japonica woodland, vegetable field and grassland land in this paper. The results showed that the organic matter content in 0~10 cm soil was the highest in grassland and the next was in E. japonica woodland and vegetable field while that in 10 cm~20 cm soil was the highest in E. japonica woodland and the next was in the vegetable field and the grassland. In 0~10 cm soil, total N and available N were the highest in the vegetable field, the next was in the grassland and E. japonica woodland, total P and available P were the highest in the grassland, the next was in the vegetable field and E. japonica woodland, total K was the highest in vegetable field, the next was in the E. japonica woodland and grassland while available K was the highest in vegetable field,and the next was in the grassland and E. japonica woodland. As to total N content in 10 cm~20 cm soil, the order was the vegetable field > the E. japonica woodland > the grassland. As to the content of available N, total P and available P in the soil,the order was the E. japonica woodland > the vegetable field > the grassland. As to total K content in the soil,the order was the vegetable field > the E. japonica woodland > the grassland. As to available K content in the soil, the order was the grassland > the vegetable field > the E. japonica woodland. Therefore it indicated that the land use types had significant effect on the distribution of soil nutrients.