Mbarki Sonia, Labidi Nehla, Mahmoudi Henda, Jedidi Naceur, Abdelly Chedly
The Laboratory of Plant Adaptation to Abiotic Stress (LAPSA), Biotechnology Center at the Technopark of Borj-Cedria (CBBC), BP 901, Hammam-Lif 2050, Tunisia.
Bioresour Technol. 2008 Oct;99(15):6745-50. doi: 10.1016/j.biortech.2008.01.010. Epub 2008 Feb 20.
The limits for loading soils with Tunisian urban compost for cultivating Medicago sativa were determined in a 6-month experiment in a greenhouse. Mature municipal solid waste compost (MSWC) from Tunis city was applied to clay and sandy soils from cultivated fields at rates equivalent to 40, 80, 120tha(-1). In the absence of MSWC, the shoot biomass (dry weight) cumulated over four cuts was 2-2.5 lower in sandy soil than in clay soil. It was 20-25% augmented upon MSWC addition in clay soil, independently of MSWC dose. The opposite trend was observed in sandy soil, the shoot yields being diminished by MSWC in a dose dependent manner. In MSWC-amended clay soil but not in sandy soil, Cd, Cu, Zn, and Pb concentrations in shoots remained below or close to the tolerated values according to EEC norms. The MSWC might be used as conditioner for clay soil, but not for sandy soil.
在温室中进行的为期6个月的实验确定了用突尼斯城市堆肥给土壤施肥以种植紫花苜蓿的限度。将来自突尼斯市的成熟城市固体废弃物堆肥（MSWC）以相当于40、80、120 t ha⁻¹ 的施用量施用于耕地的黏土和沙质土壤。在不添加MSWC的情况下，沙质土壤中四次刈割累积的地上部生物量（干重）比黏土土壤低2 - 2.5倍。在黏土土壤中添加MSWC后，地上部生物量增加了20 - 25%，且与MSWC剂量无关。在沙质土壤中观察到相反的趋势，地上部产量随MSWC剂量增加而降低。在添加了MSWC的黏土土壤中，而不是沙质土壤中，地上部的镉、铜、锌和铅浓度根据欧盟规范仍低于或接近耐受值。MSWC可用作黏土土壤的改良剂，但不适用于沙质土壤。
