| A preliminary study on amendment of saline soil through addition of sulfur |
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| DOI：10.7606/j.issn.1000-7601.2008.04.15 |
| Key Words: saline-alkali soil sulfur amendment |
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| Abstract: |
| Weinan is located in the eastern part of Guanzhong Plain which has the second largest area of saline soil in Shaanxi Province．Soil salinization not only reduces the productivity of agricultural soil but also directly affects the sustainable development of agricultural system．So it is very important to find out effective measures to ameliorate these soils．A field experiment for amendment of saline soil with sulfur as material was conducted in Weinan Shannxi Province in 2006．The results indicated that over2months after addition of sulfur to saline soil the soil nutrient status was improved and the total N and P concentration of cotton plants was increased；and the soil pH was decreased．In addition the contents of seven ions （potassium sodium calcium magnesium bicarbonate sulfate and chlorine） and EC values of soil tested were decreased with the sulfur adding．However there was a decline trend of these ions contents and EC values with the increase of sulfur usage dose．Although the sulfur indicated a obvious amendment effects to the saline-alkali soil in Weinan saline soil area the effect was limited under the current low rates of sulfur addition （the largest sulfur application amount was 225kg／hm2 in this study）．Therefore further field experiment is necessary for investigate the effects of sulfur especially in the aspect of sulfur application on saline-alkali soil. |