The use of biochar has mostly moderate-positive to negative yield effects. However, integrating biochar with compost considerably enhanced biochar’s positive effects on crops. This study aimed to investigate the potential effects of co-composted poultry litter biochar incorporation under deficit irrigation on eggplant’s growth and productivity grown in salt-affected soil. Summer and fall season field experiments were conducted during 2016/2017. Three levels of co-composted biochar (CB) (0, 5, and 10 t ha⁻¹) were used as a soil amendment combined with three irrigation levels (100, 80, and 60% of ETc). CB ameliorated the negative effects of water stress on eggplants, showing increased yield and irrigation water use efficiency (IWUE). This mainly due to the positive effect of CB on soil properties (i.e., bulk density, hydraulic conductivity, electrical conductivity, pH, useful pores%, water-holding pores%, available water, fine capillary pores%, and soil biota). The results showed that CB increased stomatal conductance, relative chlorophyll content (SPAD), and the photosynthetic efficiency of water-stressed eggplant at 80% ETc and consequently improved eggplant growth (i.e., leaf area, leaf number per plant, dry matter, stem diameter) and productivity. In summer and fall seasons, the highest fruit yields were recorded under full irrigation (28.3 t ha⁻¹) and 10 t ha⁻¹ of CB (27.8 t ha⁻¹). Soil supplemented with 5 or 10 t ha⁻¹ of CB increased IWUE by 31.6 and 64.1%, respectively, compared to CB-untreated soil. Adding 10 t ha⁻¹ of CB under irrigation with 80% ETc increased fruit yield by 37% and IWUE by 69% in relation to full irrigation and CB-untreated soil. CB may be recommended as a soil amendment for vegetable crops such as eggplant to overcome the negative effects of water stress.

生物炭的使用主要具有中等程度的积极到负面的产量影响。但是，将生物炭与堆肥整合在一起可以大大增强生物炭对农作物的积极作用。这项研究旨在调查在缺盐灌溉条件下共堆肥的家禽垃圾生物炭掺入对茄子生长和在盐害土壤中生长的生产力的潜在影响。在2016/2017年进行了夏季和秋季的田间试验。三级共堆肥生物炭（CB）（0、5和10 t ha ^-1）用作土壤改良剂，并结合了三种灌溉水平（ETc的100％，80％和60％）。CB改善了水分胁迫对茄子的不利影响，显示出增产和灌溉用水效率（IWUE）。这主要归因于CB对土壤特性（即堆积密度，水力传导率，电导率，pH，有用孔隙率％，保水孔隙率％，可用水，细毛孔孔隙率和土壤生物区系）的积极影响。结果表明，在ETc为80％的情况下，CB可以增加水分胁迫茄子的气孔导度，相对叶绿素含量（SPAD）和光合作用效率，从而改善茄子的生长（例如，叶片面积，单株叶片数，干物质，茎直径） ）和生产率。在夏季和秋季，完全灌溉（28.3吨公顷）的果实产量最高。^-1）和10 t ha ^-1的CB（27.8 t ha ^-1）。与未经CB处理的土壤相比，补充有5或10 t ha ^-1的CB的土壤的IWUE分别增加了31.6和64.1％。相对于完全灌溉和未经CB处理的土壤，在灌溉条件下添加10 t ha ^-1的CB和80％ETc可使水果产量增加37％，IWUE增加69％。可以推荐使用CB作为茄子等蔬菜作物的土壤改良剂，以克服水分胁迫的负面影响。