Municipal waste compost was evaluated under open field conditions for replacing synthetic fertilizers in a vegetable three-year succession. Three compost rates, 45 t ha^–1, 30 t ha^–1 and 15 t ha^–1 (dry matter), and compost at 15 t ha^–1 combined with 25%, and 50% of the full synthetic nitrogen rate, were compared to full and none synthetic nitrogen fertilizations. Crop succession was: tomato followed by endive in the first year; eggplant and, then, broccoli in the second year; tomato and, then, endive/broccoli, in the third year. The application of compost at a dose of at least 30 t ha^–1 or at 15 t ha^–1 with the addition of 25% of the full synthetic nitrogen rate, in Spring-Summer cycle, sustained growth and yield at levels comparable with those of synthetic nitrogen fertilization. However, only a very poor residual effect of the compost soil treatment on the yield of Autumn-Winter crops, was observed. Monitoring of nitrate content into the soil during cropping seasons, a reduction of the risk of groundwater pollution was displayed due to nitrates released by compost, respect to synthetic nitrogen fertilizer. The cumulative effects of compost application on soil properties were detected at the end of the field trials, registering changes in chemical parameters analysed, except for phosphorus and boron.

Highlights

- Municipal solid organic waste compost (MSWC) integrated with N fertilizers can sustain vegetable production.
- MSWC (at least 30 t ha^–1 d.w.) replaced synthetic fertilizers for tomato and eggplant productions.
- N fertilizer integration to the compost residual effect is necessary to sustain endive and broccoli productions.
- MSWC (at 15 t ha^–1 d.w.) needs 25% of N integration to reduce the gap with plant only fertilized with N fertilizer.
- MSWC preserved soil quality and avoided accumulation of undesired metals, such as Cu and Zn.

在露天条件下对城市垃圾堆肥进行了评估，以替代蔬菜三年连续的合成肥料。三种堆肥率，45 t ha ^–1、30 t ha ^–1和 15 t ha ^–1（干物质），以及 15 t ha ^{–1 的}堆肥结合 25% 和 50% 的全合成氮率，分别为与完全和非合成氮肥相比。作物演替是：第一年番茄接着是菊苣；茄子，然后是第二年的西兰花；番茄，然后是菊苣/西兰花，在第三年。以至少 30 t ha ^–1或 15 t ha ^–1的剂量施用堆肥添加25%的全合成氮肥后，在春夏循环中，持续生长和产量与合成氮肥相当。然而，仅观察到堆肥土壤处理对秋冬季作物产量的非常差的残留影响。在作物季节监测土壤中的硝酸盐含量，显示出由于堆肥释放的硝酸盐，地下水污染风险降低，相对于合成氮肥。在田间试验结束时检测到堆肥施用对土壤性质的累积影响，记录分析的化学参数的变化，除了磷和硼。

强调

- 与氮肥结合的城市固体有机废物堆肥 (MSWC) 可以维持蔬菜生产。
- MSWC（至少 30 t ha ^–1 dw）替代了番茄和茄子生产的合成肥料。
- 氮肥与堆肥残留效应的结合对于维持菊苣和西兰花的生产是必要的。
- MSWC（15 t ha ^–1 dw）需要 25% 的氮整合，以减少与仅施氮肥的植物的差距。
- MSWC 保持了土壤质量并避免了不需要的金属（例如铜和锌）的积累。