论文部分内容阅读
为了分析保水剂与有机肥配合施加对铁尾矿理化性质的影响,确定适宜尾矿改良的保水剂与有机肥最优配比,在迁安首钢所辖的铁尾矿区内,布设保水剂与有机肥2因素4水平的野外小区试验,并测定试验小区铁尾矿容重、孔隙度及持水量和pH、有机质、氮、磷、钾含量等理化性质,分析有机肥和保水剂对尾矿改良的作用;同时在小区内播种紫苜蓿和紫穗槐两种植物,测其生物量,验证改良效果.保水剂水平为(L·m~(-3)):0(B_0)、10(B_1)、50(B_2)、100(B_3);有机肥水平为(kg·m~(-2)):0(N_0)、2.25(N_1)、11.24(N_2)、22.49(N_3).结果表明:不同配比处理对尾矿理化性质的改良作用主要体现在0~20 cm表层尾矿,各指标均在0~20 cm层与对照(CK)差异显著.有机肥对尾矿理化性质的改良作用优于保水剂.在0~20 cm层,保水剂单因素的所有处理尾矿容重、非毛管孔隙度、有机质、速效磷和速效钾含量均与CK无显著差异,而单独施加有机肥B_0N_2、B_0N_3处理的上述指标均与CK差异显著.保水剂与有机肥二者配合施加优于保水剂或有机肥单独添加的改良效果.0~20 cm层各项指标均在配施处理B_3N_3下达到最佳,且均与CK达到显著差异.综合考虑,B_3N_3可以作为尾矿改良的保水剂与有机肥最优配比.
In order to analyze the effect of water-retaining agent and organic fertilizer on the physical and chemical properties of iron tailings, and to determine the optimal ratio of water-retaining agent and organic fertilizer for tailings improvement, in the iron tailing area under the jurisdiction of Qian’an Shougang, Organic fertilizer 2 field factor 4 field test, and test the test area iron tailings weight, porosity and water holding capacity and pH, organic matter, nitrogen, phosphorus, potassium and other physical and chemical properties, analysis of organic fertilizer and water retaining agent on tailings improvement (L · m ~ (-3)): 0 (B_0), 10 (B_1, B_1) were also sown in the plot to measure their biomass, ), 50 (B_2), 100 (B_3) and organic fertilizer (kg · m -2): 0 (N_0), 2.25 (N_1), 11.24 (N_2) and 22.49 (N_3) .The results showed that: The effect of different proportioning treatments on the tailings physical and chemical properties is mainly reflected in the 0-20 cm surface tailings, all the indicators are significant differences in the 0 ~ 20 cm layer and CK (CK) .Optimized by organic manure on tailings physical and chemical properties Better than water-retaining agent.While in 0 ~ 20 cm layer, the single factor of water-holding agent had no significant difference in bulk density, non-capillary porosity, organic matter, available phosphorus and available potassium While the above indexes treated with organic fertilizer B_0N_2 and B_0N_3 were significantly different from those of CK.The application of both water-retaining agent and organic fertilizer was better than that of water-retaining agent or organic manure alone.The indexes of 0 ~ 20 cm layer The results showed that B_3N_3 could be the optimal ratio of organic fertilizer and tailor-made improved water-retaining agent for the treatment of B_3N_3.