Jul 12, 2014

Effects of long-term fertilization on evolution of S forms in a red soil and a black soil

Ying yong sheng tai xue bao = The journal of applied ecology
Chuang XuShu-Zhen Zhang


Sulfur (S) forms in two contrasting soils (a red soil and a black soil) under different long-term fertilization treatments (from 1990 to 2011) from the National Long-term Monitoring Network of Soil Fertility and Fertilizer Effects of China were investigated using a fractionation scheme in order to explore the distribution and transportation of S with different forms in the soils. The soil samples were collected from the topsoil (0-20 cm) and subsoil (20-40 cm) horizons that were treated with no fertilizers (CK), nitrogen, phosphorus, and potassium fertilizers (NPK), or NPK plus organic manures (MNPK) since 1990. The results indicated that when compared with the CK, total S contents in the topsoil layers treated with NPK and MNPK were increased by 42% and 33% for the red soil, and by 6% and 76% for the black soil, respectively, while the total S in the subsoil layer was less affected by the fertilization treatments and obviously lower than in the topsoil layer except for the red soil treated with NPK. The main forms of inorganic S in the red soil and black soil were found to be available S and HCl-extracted S, respectively. The application of NPK and MNPK increased the available S by 447% and 102% in the topsoil layer of the red...Continue Reading

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Mentioned in this Paper

Vitreous Carbon
Infertility Study
Phosphate Measurement
Red Phosphorus
Phosphorus Measurement
Contrast Used

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