Abstract Organic wastes can be usefully recovered to produce organic amendments, for example, compost, to be used for crop production, thus reducing impacts through efficient waste management. The aim of this work was to study the effects of compost obtained from municipal waste in combination with poultry manure on plant growth, nitrate reductase (NR) activity and absorption and distribution of heavy metals (HM) in plant tissues of tomatoes, grown in pots in greenhouses. Two compost types obtained from municipal waste mixed with poultry manure (C1 = 3:2 and C2 = 2:3) were used at two different ages (105 d and 173 d) and at two mix rates with soil (32.5 g pot−1 and 65 g pot−1); soil with no compost amendment was used as control. The experiment was conducted using tomato plants in pots and plant growth and nutrient plant uptake was determined after 65 days from plant transplanting. Results obtained indicated that compost type and compost rate affected biomass production. However, compost age did not influence the development of plants. Nutrient status of tomato plants was also investigated with reference to the N cycle. Nitrite accumulation in the leaves increased with the increase in compost doses. The accumulation of NO2− was associated with a significant increase in NR activity. HM content in leaves decreased with compost use. HM accumulated preferentially in roots and leaves and the soil to root metals transfer was in this order: Fe (1.08–2.14)> Co (0.53–4.10)>Cu (0.28–2.28) >Mn (0.3–1.34) >Zn (0.87–1.21)>Cr (0.12–1.64). The highest and lowest dynamic bioaccumulation factors (BAFdyn) were observed in roots and stems, respectively. The root system acted as a barrier for Cd and Pb. It was concluded that compost use is beneficial for tomato plants, with particular reference to the compost obtained by using a higher amount of poultry manure (C2) in the mix.

中文翻译：

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城市垃圾和家禽粪便堆肥影响番茄植物的生物质生产、硝酸还原酶活性和重金属

摘要 有机废物可以有效地回收以生产有机改良剂，例如用于作物生产的堆肥，从而通过有效的废物管理减少影响。这项工作的目的是研究从城市垃圾中获得的堆肥与家禽粪便相结合对植物生长、硝酸还原酶 (NR) 活性以及盆栽番茄植物组织中重金属 (HM) 吸收和分布的影响。在温室中。从城市垃圾与家禽粪便混合获得的两种堆肥类型（C1 = 3:2 和 C2 = 2:3）用于两个不同的年龄（105 天和 173 天），并以两种混合比例与土壤（32.5 g pot-1和 65 克锅−1)；没有堆肥添加物的土壤用作对照。该实验使用盆栽番茄植物进行，在植物移植 65 天后测定植物生长和营养植物吸收。获得的结果表明堆肥类型和堆肥率影响生物量生产。然而，堆肥年龄并没有影响植物的发育。番茄植株的营养状况也参考氮循环进行了调查。叶片中亚硝酸盐的积累随着堆肥剂量的增加而增加。NO2-的积累与NR活性的显着增加有关。随着堆肥的使用，叶子中的HM含量降低。HM优先在根和叶中积累，土壤向根的金属转移顺序为：Fe(1.08-2.14)>Co(0.53-4.10)>Cu(0.28-2.28)>Mn(0.3-1.34)>Zn(0.87) –1.21)>Cr (0.12–1.64)。分别在根和茎中观察到最高和最低的动态生物蓄积因子 (BAFdyn)。根系充当 Cd 和 Pb 的屏障。结论是堆肥的使用对番茄植物有益，特别是通过在混合物中使用更高量的家禽粪便 (C2) 获得的堆肥。