甘肃省土壤有机质提升技术模式对土壤耕层养分影响初探

发布时间：2018-07-16 10:47

【摘要】：对甘肃省11个地区的75个对比试验点实施土壤有机质提升技术模式前后的土壤有机质进行差异显著性假设测验及土壤样本频数分布变化特点分析,研究表明:秸秆及绿肥还田后与还田前比较,土壤有机质平均增加0.569 g·kg-1,增加4.43%,11个地区土壤有机质含量在秸秆或绿肥还田后与还田前的差异显著性假设测验中,10个地区达到显著水平。全省各试验点秸秆与绿肥还田的作物产量较对照增产率在-1.74%~15.4%之间,平均为5.2%。有机质与全氮,有效磷、CEC和全磷有稳定的正相关关系,伴随着有机质的提高,土壤有效磷、全磷和CEC有同步提高的趋势。全省各点秸秆及绿肥还田后与还田前土壤有机质及对照的土壤有机质含量频数分布呈偏态的正态分布,其峰偏向较大数值,说明有机质提升措施实施后,秸秆及绿肥还田的土壤有机质增加的样点较对照田多且集中度高。结果表明,秸秆及绿肥还田等措施增加土壤有机质及耕层养分含量,提高土壤肥力的效果明显。
[Abstract]:The differences of soil organic matter in 75 contrast test sites in 11 regions of Gansu Province before and after the implementation of the soil organic matter lifting technique model were tested by using significant hypothesis test and the characteristics of frequency distribution of soil samples were analyzed. The results showed that straw and green manure were compared with those before returning to the field. The yield of straw and green manure returning to the field in the whole province was between -1.74% and 15.4%, with an average of 5.2%. The soil organic matter increased in the field of straw and green manure, and the concentration of soil organic matter was higher than that of the control field. The results showed that straw and green manure could increase the content of soil organic matter and soil nutrients and improve soil fertility.
【作者单位】：甘肃省耕地质量建设管理总站;甘肃省榆中县农业技术推广中心;
【基金】：基金项目甘财农〔2010〕208号
【分类号】：S158

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