ABSTRACT

Current trends in the intensification of olive cultivation including irrigation have dictated a need to reconsider amendment management practices. The addition of organic wastes to agricultural soils is becoming a common practice as a disposal strategy and to improve the physical and chemical soil properties This study examines physiological varieties of young olive trees (Olea europaea L.) grown on deficit irrigation under four different amended soil. We evaluated the short-term effect of different amended soil under deficit irrigation on soil, plant water status, level of soil, and leaf Nitrogen. Water stress was considered to be insignificant or absent with an irrigation amount of 50% of daily evapotranspiration. Leaf relative water content was between 65 and 88% for the Chemlali cultivar, while that of the Koroneiki was between 60 and 70%. Under conditions of water stress, photosynthesis of trees planted in soil amended with biochar decreased from 8.5 to 1.5 μmol.CO₂.m⁻²s⁻¹, compared to the control for both cultivars.To conclude, amendment addition, used as a tool for sustainable agriculture, could improve plant growth, although soil fertility. The type and amount of amendment should receive special attention to be efficient.

摘要

当前包括灌溉在内的橄榄种植集约化趋势表明需要重新考虑修正管理做法。在农业土壤中添加有机废物正成为一种普遍的做法，作为一种处置策略并改善土壤的物理和化学性质本研究检查了年轻橄榄树的生理品种（Olea europaeaL.) 在四种不同的改良土壤下生长在亏缺灌溉上。我们评估了亏缺灌溉下不同改良土壤对土壤、植物水分状况、土壤水平和叶片氮的短期影响。灌溉量为每日蒸发量的 50% 时，认为水分胁迫不显着或不存在。Chemlali 品种的叶子相对水分含量在 65% 到 88% 之间，而 Koroneiki 的叶子相对水分含量在 60% 到 70% 之间。在缺水条件下，用生物炭改良的土壤中种植的树木的光合作用从 8.5 降至 1.5 μmol.CO ₂ .m ^-2 s ^-1，与两个品种的对照相比。总而言之，用作可持续农业工具的修正添加可以改善植物生长，尽管土壤肥力。修改的类型和数量应特别注意，以确保有效。