沼液施用背景下稻田土壤养分的含量特征

发布时间：2018-05-31 15:10

本文选题：种养结合 + 沼液土壤　；参考：《江苏农业科学》2017年02期

【摘要】：分析长期施用沼液对春、秋2季水稻—油菜轮作地土壤养分含量的特征。采用SPSS、Map GIS与GS+等方法对试验区与对照区2季土壤pH值、有机质(SOM)、全氮(TN)、碱解氮(AN)、全钾(TK)、有效钾(AK)、全磷(TP)、有效磷(AP)等含量8个指标进行偏相关、模糊综合评判以及空间格局分析。结果表明,长期施用沼液后,试验区土壤SOM、AN、TK、AK、TN、TP、AP含量增加,而pH值无显著变化;2季之间8个指标变化不显著;试验区各养分因子与综合肥力指数Pi的偏相关系数大小序列为APSOMAKTP等,而对照区为APAKTPSOM等,施用沼液改变了土壤养分因子之间的关系;养分模糊综合评分试验区高于对照区;除春、秋2季pH值、TK含量与秋季AK含量的空间变异主要受结构性因素(一般为成土母质、地形等)影响外,其他因子变异则受结构性与随机性因素(一般为施肥、种植管理等)共同影响;在空间格局图上,各养分含量高值区主要分布于试验区所处的西侧。研究结果证实长期施用沼液能改变水稻—油菜轮作地土壤养分空间格局,提高土壤综合肥力。
[Abstract]:The effects of biogas liquid on soil nutrient content in spring and autumn were analyzed. The contents of soil pH value, organic matter (SOM), total nitrogen (TNN), alkali-hydrolyzed nitrogen (ANN), total potassium (TK), available potassium (K), total phosphorus (P), available phosphorus (P), and available phosphorus (APP) were determined by SPSS map GIS and GS methods in the experiment area and the control area, and the fuzzy comprehensive evaluation and spatial pattern analysis were carried out. The results showed that after long-term application of biogas liquid, the content of soil SOMN and TKK, TNN, TPAP increased, but the pH value did not change significantly during the two seasons, and the partial correlation coefficient sequence between the nutrient factors and the comprehensive fertility index Pi was APSOMAKTP and so on. But the control area was APAKTPSOM, the application of biogas liquid changed the relationship between soil nutrient factors, the fuzzy comprehensive score of nutrient was higher than that of the control area, The spatial variation of pH value and AK content in autumn was mainly affected by structural factors (generally soil parent material, topography and so on), while other factors were influenced by structural and random factors (generally fertilization). In the spatial pattern map, the high value areas of nutrient content were mainly distributed in the west side of the experimental area. The results showed that long-term application of biogas liquid could change the spatial pattern of soil nutrients and improve soil comprehensive fertility.
【作者单位】：西南民族大学青藏高原研究院;西南民族大学生命科学与技术学院;
【基金】：四川省科技支撑计划(编号:2011FZ0054) 西南民族大学创新型科研项目(编号:CX2014SZ115);西南民族大学优秀学生培养工程项目(编号:13ZYXS79);西南民族大学青年教师基金(编号:13NZYQN20)
【分类号】：S158.3

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