The Egyptian soil contains low organic matter and high calcium carbonate with a pH of 7.5–8.2, which reduces the availability of phosphorus (P) improve the efficiency of applying P fertilisers in alkaline soils. Therefore, the aim of this study is to evaluate the effect of biochar (B) at 0 t ha^–1 and 10 t ha^–1 with different P fertiliser rates (i.e. 0% P, 50% P, 100% P and 150% P of the recommended dose) on wheat yield (Triticum aestivum L.) and soil fertility in clay texture soil during the 2015–2016 and 2016–2017 growing seasons. The results show a significant increase in all of the following: soil availability and plant uptake of NPK; flag leaf area (FLA); the number of fertile tillers (NFT); the number of grains in spike (NGS), and the grain yield of wheat plants treated with P fertiliser alone, or when P fertiliser combined with biochar addition. FLA increased by 81.82% and 72.27% in the plots treated with biochar during the 1st and 2nd seasons respectively. Wheat uptake of total nitrogen–P–potassium (NPK) increased as a result of increasing the concentration of inorganic P in the studied soil. It is noteworthy that adding biochar to P fertiliser supplements P-fertiliser such as in the treatment of 10 t ha^–1 biochar at 50% P, where the highest grain yield was recorded compared with adding 100% P and 150% P of the recommended dose. The results indicated that integrating biochar and P fertiliser can be a practical approach to improve wheat production and soil fertility.

埃及土壤有机质含量低，碳酸钙含量高，pH 值为 7.5-8.2，这降低了磷 (P) 的有效性，提高了在碱性土壤中施磷肥的效率。因此，本研究的目的是评估生物炭 (B) 在 0 t ha ^–1和 10 t ha ^–1施用不同磷肥率（即 0% P、50% P、100% P 和 150%推荐剂量的 P) 对小麦产量 ( Triticum aestivumL.) 和 2015-2016 年和 2016-2017 年生长季节粘土质地土壤的土壤肥力。结果显示以下所有方面都显着增加：土壤可用性和植物对 NPK 的吸收；旗叶面积（FLA）；可育分蘖数（NFT）；穗粒数（NGS）和单独施磷肥或磷肥结合生物炭处理的小麦植株的籽粒产量。第一季和第二季使用生物炭处理的地块的FLA分别增加了81.82%和72.27%。由于增加了研究土壤中无机磷的浓度，小麦对总氮磷钾 (NPK) 的吸收增加。值得注意的是，在磷肥中添加生物炭补充了磷肥，如处理 10 t ha ^–1biochar 在 50% P 下，与添加 100% P 和 150% P 的推荐剂量相比，记录的谷物产量最高。结果表明，生物炭和磷肥相结合是提高小麦产量和土壤肥力的实用方法。