| Study on evolution characteristics of sandy field in arid region |
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| DOI：10.7606/j.issn.1000-7601.2009.01.08 |
| Key Words: sandy-field soil-sand ratio soil water content soil nutrient |
| Author Name | Affiliation | | XU Qiang | School of Agriculture, Ningxia University， Yinchuan, Ningxia 750021, China | | WU Hongliang | School of Agriculture, Ningxia University， Yinchuan, Ningxia 750021, China | | KANG Jianhong | School of Agriculture, Ningxia University， Yinchuan, Ningxia 750021, China | | QIANG Li | School of Agriculture, Ningxia University， Yinchuan, Ningxia 750021, China |
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| Abstract: |
| The testing of the mixed (ratio) of sand and soil, the water content of topsoil, the organic matter content,the total salt content, N, P & K of sandy field planted for 1~17 years and abandoned sandy field at Xiangshan Mountain area of Ningxia indicated that the loess content of the sandy field (from 9.24% to 36.15%)and the ratio of soil-sand (from 0.09 to 0.57) improved gradually， while the sand content of the sandy field(from 90. 76% to 63. 85%)，the water content of topsoil(from 25. 30% to 13. 70%), the total salt content (from 0.21 g/kg
to 0. 05 g/kg), available P(from 2.42 mg/ kg to 2.26 mg/ kg)& K(rom 172 mg/kg to 109 mg//kg) decreased gradually. The organic matter, total nitrogen， available N increased first and de-creased afterw ards, reached its peak (the organic matter:12.5g/kg, total nitrogen:0.32 g/ kg, available N:15.1 mg/kg) at 4~5 years and then began to decrease. It is suggested that the sandy field must be artificially fertilized after 4~5 years and leave in fallow for 1~2 years, which may be beneficial to improve the sandy field performance. |
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