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虽然水处理残渣与有机污泥混施可以减少土壤P过量积累以及P对地表和地下水的污染.但随着水处理残渣施用量增大,又有可能导致土壤P不足或对植物的铝毒作用.本研究通过对植物根系形态特征的分析,对温室控制环境下有机污泥与水处理残渣合施对冬小麦(Triticum aestivium L.)生长的影响作用进行了研究.实验设6种处理,生物污泥(g.kg-1干土)与水处理残渣(g.kg-1干土)之比分别为0∶0;0∶80;50∶0;50∶10;50∶40和50∶80.结果表明,与不施用有机污泥相比,施用有机污泥后冬小麦根系长度、根系表面积、根体积和根长密度均显著增加,分别平均增加139.4%,140.1%,157.6%和139.4%.在现有施用量范围内,水处理残渣使用量加大没用对各种根系参数(即根长、根表面积、根平均直径、根体积、根长密度和比根长)产生不利作用.证明水处理残渣与有机污泥混施,即可降低对环境质量的不利影响,在农业生产上具有良好应用前景.
Although the combination of water treatment residues and organic sludge can reduce the excessive accumulation of soil P and the pollution of P on the surface and groundwater, with the increase of water treatment residues, it may lead to insufficient soil P or aluminum toxicity to plants In this study, the effects of organic sludge and water treatment residue on the growth of winter wheat (Triticum aestivium L.) were studied by analyzing the morphological characteristics of plant roots.With six treatments and biofouling The ratio of mud (g.kg-1 dry soil) to water treatment residue (g.kg-1 dry soil) was 0: 0; 0:80; 50: 0; 50:10; 50:40 and 50:80 respectively The results showed that root length, root surface area, root volume and root length density of winter wheat increased significantly by 139.4%, 140.1%, 157.6% and 139.4%, respectively, compared with no organic sludge. Increasing the use of water treatment residues within the range of current application levels did not contribute adversely to various root parameters (ie, root length, root surface area, root mean diameter, root volume, root length density, and specific root length). Water treatment residues mixed with organic sludge, you can reduce the adverse impact on the quality of the environment , Has good application prospects in agricultural production.