许强,吴宏亮,康建宏,强力.旱区砂田肥力演变特征研究[J].干旱地区农业研究,2009,27(1):37~41
旱区砂田肥力演变特征研究
Study on evolution characteristics of sandy field in arid region
  
DOI：10.7606/j.issn.1000-7601.2009.01.08
中文关键词:  砂田  土砂比  土壤含水量  土壤养分
英文关键词:sandy-field  soil-sand ratio  soil water content  soil nutrient
基金项目:国家科技支撑计划课题:“农牧交错风沙区保护性耕作技术集成研究与示范”(2006BAD15B05)；“压砂地持续利用种植结构模式和轮茬作物筛选关键技术研究与示范”课题(2007BAD54B02)
作者单位
许强 School of Agriculture, Ningxia University， Yinchuan, Ningxia 750021, China 
吴宏亮 School of Agriculture, Ningxia University， Yinchuan, Ningxia 750021, China 
康建宏 School of Agriculture, Ningxia University， Yinchuan, Ningxia 750021, China 
强力 School of Agriculture, Ningxia University， Yinchuan, Ningxia 750021, China 
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中文摘要:
      以宁夏香山地区种植1~17 a砂田及撂荒砂田为研究对象,对砂土比例、耕层土壤含水量(0~20cm)、有机质含量、全盐量、速氮、速磷、速钾的变化进行了分析。结果表明,连续种植可使砂田覆砂层含土量(由9.24%增加到36.15%)、土砂比(由0.09增加到0.57)不断提高,含砂量(由90.76%降低到63.85%)、土壤含水量(由25.30%降低到13.70%)、全盐含量(由0.21 g/kg降低到0.05 g/kg)、速磷(由2.42 mg/kg降低到2.26 mg/kg)、速钾(由172 mg/kg降低到109 mg/kg)不断降低,而有机质、全氮、速氮则先升后降,在连续种植45 a后达到最高(有机质:12.5 g/kg;全氮:0.32 g/kg;速氮:15.10 mg/kg),此后不断下降。因此砂田连续种植45 a必须人工补肥,连续种植若干年后休闲12 a有利于砂田性能的恢复。
英文摘要:
      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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