Journal of Food, Agriculture and Environment

Phosphorus sorption and its relation to soil physiochemical properties in the albic black soil of Northeastern China 

Author(s):

Wenjing Yang, Hongguang Cheng, Fanghua Hao, Wei Ouyang, Chunye Lin *

Recieved Date: 2013-01-28, Accepted Date: 2013-04-26

Abstract:

The Sanjiang Plain is situated in the northeast part (45º01’00”~48º27’56”N, 130º13’00”~135º05’26”) of the Heilongjiang Province in northeastern China and is well-known for its fertile black soil resource and producing large quantity and high quality of beans and rice in recent decades in China. However, intensively agricultural activities may pose P loss risk to waters. Thus, it is important to understand the P buffering capacity and loss potential for the albic black luvisols. The objectives of study were to study the P sorption characteristics in the albic black soil and the relationships between sorption parameters and the soil properties. Surface soil samples were collected at 12 sites and analyzed for soil properties and P content. The results showed that the albic black soil of the Sanjiang Plain were characterized by low pH (5.4~6.8) and Ca content (0.44~0.73%) and high soil organic matter (SOM) content (5.3~11.5%), while contents of Al (5.8~8.7%) and Fe (2.3~4.3%) in the soil were generally similar to those for China soils and worldwide soils. P content in the soil ranged from 547.1 mg kg-1 to 1116.5 mg kg^-1. The maximal P sorption capacity (q_max) and sorption- desorption equilibrium P concentration (EPC0) for the soil ranged from 682.5 mg kg^-1 to 1250.3 mg kg^-1 and from 0.037 mg L^-1 to 0.077 mg L^-1, respectively. Sorption energy constant k averaged 0.229 (0.086 to 0.721) L mg^-1, being positively correlated to Al content in the soil. EPC0 was positively correlated to inorganic P (Pi) and negatively correlated to SOM. q_max was negatively correlated to pH and Pi and apparently positively correlated to SOM. In essence, however, SOM inhibited P sorption in the albic black soil. Noting high q_max and low EPC0, the albic black soil of the Sanjiang Plain is supposed to have high P buffering capacity and low P loss potential to waters. 

Keywords:

Albic soil, phosphorus, sorption, capacity, EPC0, Sanjiang Plain

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 2
Category: Environment
Pages: 1093-1097

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