Nutrient Limiting Factors in Acidic Vegetable Soils

doi:10.1016/S1002-0160(06)60096-9

Pedosphere

Volume 16, Issue 5, October 2006, Pages 624-633

https://doi.org/10.1016/S1002-0160(06)60096-9 Get rights and content

ABSTRACT

Nutrient limiting factors in acidic soils from vegetable fields of the Chongqing suburbs of China were assessed by employing the systematic approach developed by Agro Services International (ASI) including soil testing, nutrient adsorption study, and pot and field experiments to verify the results of soil testing, with a conventional soil test (CST) used for comparison. The ASI method found the moderately acidic soil (W01) to be N and P deficient; the strongly acidic soil (W04) to be N, K and S deficient; and the slightly acidic soil (W09) to be N, K, S, Cu, Mn, and Zn deficient. The CST method showed that W01 had P, B and Cu deficiencies; W04 had N, P and S deficiencies; and W09 had N, P, S, B, Cu, and Zn deficiencies. There were differences between the two methods. Among the two indicator plants selected, the response of sorghum on the three representative acidic soils was more closely related to the ASI results than that of sweet pepper.

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Citation Excerpt :
Dry weight loss was calculated by the subtraction of the dry weights before and after a preparation. The concentrations of available N, P and K were measured based on ASI (Ye et al., 2006). Van Soest analysis method was used to determine the concentrations of cellulose and lignin (Van Soest and Wine, 1968).
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Input of large amounts of N and S compounds into forest ecosystems through atmospheric deposition is a significant risk for soil acidification in the oil sands region of Alberta. We evaluated the sensitivity of forest soils to acidification in two watersheds (Lake 287 and Lake 185) with contrasting hydrological regimes as a part of a larger project assessing the role of N and S cycling in soil acidification in forest ecosystems. Fifty six forest soil samples were collected from the two watersheds by horizon from 10 monitoring plots dominated by either jack pine (Pinus banksiana) or aspen (Populus tremuloides). Soils in the two watersheds were extremely to moderately acidic with pH (CaCl₂) ranging from 2.83 to 4.91. Soil acid-base chemistry variables such as pH, base saturation, Al saturation, and acid-buffering capacity measured using the acetic acid equilibrium procedure indicated that soils in Lake 287 were more acidified than those in Lake 185. Acid-buffering capacity decreased in the order of forest floor > subsurface mineral soil > surface mineral soil. The most dramatic differences in percent Ca and Al saturations between the two watersheds were found in the surface mineral soil horizon. Percent Ca and Al saturation in the surface mineral soil in Lake 287 were 15% and 70%, respectively; the percent Ca saturation value fell within a critical range proposed in the literature that indicates soil acidification. Our results suggest that the soils in the two watersheds have low acid buffering capacity and would be sensitive to increased acidic deposition in the region.
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¹: Project supported by the Potash & Phosphate Institute/Potash & Phosphate Institute of Canada (PPI/PPIC) (No. Chongqing-02).

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Nutrient Limiting Factors in Acidic Vegetable Soils1

ABSTRACT

Pedosphere

Phosphate sorption-desorption characteristics in two Inceptisols and an Alfisol of Chattisgarh, India

Pedosphere

Spatiotemporal distribution of fertility in vegetable soils in Nanjing

Soils

Nutrient uptake and use efficiency of irrigated rice in response to potassium application

Pedosphere

Changes in soil properties and environment in vegetable green houses

Soils

Contents and evaluation of heavy metals in soil of vegetable bases of Nanning

Soils

Kinetics of phosphate release from three phosphate-treated soils

Pedosphere

Nutrient Limiting Factors in Acidic Vegetable Soils¹