矿渣区复土种植促进欧李生长和营养吸收效果试验研究

Backfill Soil to Slag for Calcium Fruit Growing and Improving Nutrient Absorption

为改善矿区遗留矿渣土质,推动资源环境协调发展。该研究以陕西韩城两片矿渣土为研究对象,分析了矿渣土复土和不复土对欧李的生长、干物质累积和养分吸收的影响。结果表明:与矿渣土种植相比,复土改良种植的欧李株高和分枝数显著(P<0.05)提高了52%和140%;茎、叶、果和总干物质累积量显著(P<0.05)提高了4.78、3.96、3.89和4.1倍;植株全氮、全磷、全钾累积量显著(P<0.05)提高了6.1,5.7和5.8倍,且促进了养分向果实的转运。复土改良促进了作物生长和凋落物的堆积,丰富了土壤养分,不仅提高了土壤肥力且显著促进了作物的生长,形成了改善土壤质量的良性循环。建议在矿渣土表层覆盖30cm土壤,种植作物。

In order to improve soil quality of the slag, promote the development of local resources and environment;calcium fruit cultivated under slag with backfill soil were studied regarding their performance in growth, dry matter accumulation and nutrient uptake. The results showed that calcium fruit, compared with slag to be backfill soil, increased height and branching number under slag with soil restored significantly by 52% and 140% respectively;the dry matter accumulation of plant stem, leaf and fruit were increased 4.78, 3.96 and 3.89 times respectively;whole N, P and K uptake by plant were increased 6.1, 5.7 and 5.8 times, respectively. The backfill soil promoted crop growth and litter accumulation and thus improved soil fertility and crop growth. Therefore, 30cm soil for backfill was suggested to improve slag.