Effects of Long-term Chemical Fertilization on Soil Physical Properties of three soils in Shandong Province

Abstract

Abstract: To clarify the effects of long-term application of chemical fertilizer on physical properties of soils, long-term fertilization experiment was used to study the effect of application of chemical fertilizer on physical properties of brown soil, fluvo-aquic soil and cinnamon soil in Shandong province. Some results showed that long-term application of chemical fertilizers could cause soil harden and property deterioration. But results in this research showed that sealing of soil and bulk density of soil are not caused by employing chemical fertilizers twice a year under long-term located fertilizer experiment. Results showed that not only porosity of soil of treatments increased to different extents compared to control treatment, but also bulk densities of soils all decreased and had no obvious tendency of increase after sole chemical fertilizers were employed for 25 years. Brown soil had the highest porosity of soil among three types of soils, then fluvo-aquic soil and cinnamon soil the last. In addition, there was a negative correlation between bulk density and porosity of soil of three soil types and a negative correlation between bulk density and organic matter of brown soil and fluvo-aquic soil, while there was not a negative correlation between bulk density and organic matter of cinnamon soil. Author thought that long-term application of chemical fertilizer couldn’t markedly increase bulk density of soil while increased soil porosity, thus, it wasn’t the main cause of long-term application of chemical fertilizer on sealing of soil.

CLC Number:

S152.5

Yang Guo, Zhang Yingpeng, Wei Jianlin, Gao Bimo, Li Yan, Dong Xiaoxia. Effects of Long-term Chemical Fertilization on Soil Physical Properties of three soils in Shandong Province[J]. Chinese Agricultural Science Bulletin, 2007, 23(12): 244-244.

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