| Determinating soil modification coefficient of several typical soils in Pingluo, Ningxia |
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| DOI：10.7606/j.issn.1000-7601.2010.05.23 |
| Key Words: Pingluo soil modification coefficient valid function soil potential productivity |
| Author Name | Affiliation | | HUANG Yuxia | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | LI Xinping | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | MAO Wenjuan | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | WEI Yukui | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Determination of the soil modification coefficient is vital to eva
luate the land potential productivity. Through a pot experiment of wheat, the model of lowest limited factor was used to estimate the modification coefficient of saline soil, alkali soil, modified saline-alkali soil and irrigation-silted soil in Pingluo. The results of the modification coefficient were 0.3045 in saline soil, 0.2206 in alkali soil, 0.4806 in modified saline-alkali soil, and 0.6188 in irrigation-silted soil. It showed that the irrigation-silted soil was suitable to plant, and its potential productivity was the highest, while saline soil and alkali soil were the lowest. Soil nutrient was the main limiting factor to potential productivity of the four tested soils, also soil structure and soil salt were major limiting factors for saline soil and alkali soil. We could use proper modified measures and rational fertilization to improve the potential productivity of tested soils. |
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