Photosynthesis is the main biophysiological process that governs plant growth and development. Under nutrient deficiency in crops and soils, many photosynthetic reactions can be disturbed. We compared two polyphosphates (Poly-A and Poly-B) and an orthophosphate fertiliser (Ortho-P) to an unfertilised treatment under three drip fertigation frequencies. Results showed that the electron transport chain between PSII and PSI was significantly enhanced in fertigated chickpea plants compared with the control treatment. The polyphosphate fertiliser (Poly-A) enhanced the number of electron acceptors of the photosynthetic linear electron transport chain compared with the other fertiliser forms. Furthermore, the time for reaching the maximum intensity F_m was shortened in the fertilised chickpea plant indicating that the rate of light trapping and electron transport was enhanced under phosphorus drip fertigation. Also, the energy needed to close all reaction centres was decreased with P fertigated treatments, as revealed by the electron acceptor pool size of PSII (Sm/t_Fmax). However, no significant effects of fertiliser forms or fertigation frequencies were observed on the energetic demand for reaction centres closure. Plants grown under polyphosphate fertigation absorbed significantly more phosphorus. Positive correlations between phosphorus uptake, photosynthetic yield, chickpea podding dynamic, and grain yield showed the beneficial effects of adequate phosphorus nutrition on chickpea growth and productivity.

光合作用是控制植物生长发育的主要生物生理过程。在农作物和土壤营养缺乏的情况下，许多光合反应会受到干扰。我们将两种多磷酸盐（Poly-A 和 Poly-B）和正磷酸盐肥料（Ortho-P）与三种滴灌频率下的未施肥处理进行了比较。结果表明，与对照处理相比，施肥鹰嘴豆植物中 PSII 和 PSI 之间的电子传递链显着增强。与其他肥料形式相比，聚磷酸盐肥料 (Poly-A) 增加了光合线性电子传递链的电子受体数量。此外，达到最大强度的时间F _m在受精的鹰嘴豆植物中缩短，表明在磷滴灌条件下光捕获和电子传递速率增强。此外，关闭所有反应中心所需的能量随着 P 施肥处理降低，如 PSII 的电子受体池大小 (Sm/t _Fmax ) 所示。然而，没有观察到肥料形式或施肥频率对反应中心关闭的能量需求的显着影响。在多磷酸盐施肥下生长的植物吸收了更多的磷。磷吸收、光合产量、鹰嘴豆结荚动态和籽粒产量之间的正相关表明充足的磷营养对鹰嘴豆生长和生产力的有益影响。