基于田间试验的砒砂岩和沙复配成土特性研究

Study on the characteristics of soil formed by the mixture of soft rock and sand based on field test

为研究砒砂岩和沙复配成土特性及对农业作物的影响,本文利用正交试验方法开展田间试验,采用不同的砒砂岩和沙混合比例,引入灌溉量、种植作物类型、农艺处理等变量参数,共设置10个试验小区。经过两季的作物种植,从复配土土壤质地、水稳定性大团聚体含量、有机质、作物生长水平及产量四个方面进行分析。结果表明,随着时间的推移,混合砒砂岩改良沙地,促使土壤宜耕层厚度增长,且土壤结构改良,肥力逐渐增加;作物对不同比例的复配土壤具有不同的敏感性,玉米、大豆在砒砂岩和沙1∶2混合比例下最适宜生长,小麦、马铃薯在砒砂岩和沙1∶5混合比例下最适宜生长。

In order to study the characteristics of the soil formed by the mixture of soft rock and sand and its influence on agricultural crops,the orthogonal test method was used to carry out the field experiment.Different proportion of soft rock and sand was used,and variable parameters such as irrigation amount,planting crop type and agricultural treatment were introduced.A total of 10 experimental communities were set up.After two seasons of crop planting,the soil texture,water stable aggregate content,organic matter,crop growth level and yield were analyzed.The results showed that,with the passage of time,the mixed soft rock improved the sandy land,promoted the increase of the thickness of the suitable ploughing layer of the soil,and the improvement of the soil structure and the gradual increase of the fertility;the crops had different sensitivities to the mixed soil of different proportions;corn and soybean were the most suitable for growth under the mixed proportion of soft rock and sand 1∶2;wheat and potato were the most suitable for growth under the mixed proportion of soft rock and sand 1∶5.