SHE Xiao-yan, XIE Yong-sheng, WANG Hui, et al. Changes of Fertility in Typical Lou Soil Profiles During Recent 30 Years in the Loess Area of Shaanxi Province[J]. Bulletin of Soiland Water Conservation, 2010, 29(2): 150-153.
SHE Xiao-yan, XIE Yong-sheng, WANG Hui, et al. Changes of Fertility in Typical Lou Soil Profiles During Recent 30 Years in the Loess Area of Shaanxi Province[J]. Bulletin of Soiland Water Conservation, 2010, 29(2): 150-153.DOI:
The study bosed on historical date of typical Lou soil profile in different years. In order to know the historical evolution and characteristics of nutrient on soil profile
the change of fertility and profile distribution of typical Lou soil in recent 30 years was studied by sampling . Results showed that the soil nutrient contents increased significantly in different soil layers ( except for total potassium) since the 1980s. Organic matter increased by 104. 6%; total nitrogen
by 61. 7%; total phosphorus
by 21. 6%; available nitrogen
by 67 . 3 %; and available phosphorus
by 255 percent .Total potassium in the whole profile decreased to some extent
but in the top-soil
it declined only by 9. 6 %. In top-soil
the ration of soil nutrient content were greater in 2008 than those in 1982 . Long-term fertilization is helpful to enhance soil fertility and the fertility of Lou soil is propitious to growth and absorption for plants .