Laboratoire d'Adaptation des Plantes aux Stress Abiotiques, Centre de Biotechnologies, Technopole Borj Cedria, BP 901, Hammam Lif 2050, Tunisia.
J Sci Food Agric. 2010 Apr 30;90(6):965-71. doi: 10.1002/jsfa.3904.
Inappropriate utilisation of biosolids may adversely impact agrosystem productivity. Here, we address the response of wheat (Triticum durum) to different doses (0, 40, 100, 200 and 300 t ha(-1)) of either municipal solid waste (MSW) compost or sewage sludge in a greenhouse pot experiment. Plant growth, heavy metal uptake, and antioxidant activity were considered.
Biomass production of treated plants was significantly enhanced at 40 t ha(-1) and 100 t ha(-1) of MSW compost (+48% and +78% relative to the control, respectively). At the same doses of sewage sludge, the increase was only 18%. Higher doses of both biosolids restricted significantly the plant growth, in concomitance with the significant accumulation of heavy metals (Ni2+, Pb2+, Cu2+ and Zn2+), especially in leaves. Leaf activities of antioxidant enzymes (ascorbate peroxidase, glutathione reductase, catalase and superoxide dismutase) were unchanged at 40 t ha(-1) MSW compost or sewage sludge, but were significantly stimulated at higher doses (200-300 t ha(-1)), together with higher leaf concentration of reduced glutathione.
This preliminary study suggests that a MSW supply at moderate doses (100 t ha(-1)) could be highly beneficial for wheat productivity.
生物固体的不当利用可能会对农业系统的生产力产生不利影响。在这里，我们在温室盆栽实验中研究了不同剂量（0、40、100、200 和 300 吨/公顷）的城市固体废物（MSW）堆肥或污水污泥对小麦（硬粒小麦）的响应。考虑了植物生长、重金属吸收和抗氧化活性。
用 MSW 堆肥处理的植物生物量在 40 t ha(-1) 和 100 t ha(-1) 时显著增加（分别比对照增加 48%和 78%）。在相同剂量的污水污泥下，增加幅度仅为 18%。两种生物固体的更高剂量都会显著限制植物的生长，同时重金属（Ni2+、Pb2+、Cu2+和 Zn2+）的积累也会显著增加，尤其是在叶片中。叶片抗氧化酶（抗坏血酸过氧化物酶、谷胱甘肽还原酶、过氧化氢酶和超氧化物歧化酶）的活性在 40 t ha(-1) MSW 堆肥或污水污泥时没有变化，但在更高剂量（200-300 t ha(-1)）时显著增加，同时叶片还原型谷胱甘肽浓度也增加。
这项初步研究表明，中等剂量（100 t ha(-1)）的 MSW 供应可能对小麦生产力非常有益。
