Partial substitution of exogenously applied phosphatic fertilizers by phosphate solubilizing bacteria in maize under calcareous soil

作者：Hajira, Yousaf Jamal, Muhammad Adnan, Manzoor Ahmad, Maria Mussarat, Muhammad Hamzah Saleem, Beena Saeed, Fazli Wahid, Rafi Ullah, Shah Fahad, Baber Ali, Imtiaz Ali Khan, Sezai Erċışlı, Kirill S. Golokhvast · 发表于：PeerJ · 年份：2023 · DOI：10.7717/peerj.15038 · 被引用次数：7 · 研究领域：Phosphorus and nutrient management、Plant nutrient uptake and metabolism、Phytase and its Applications

Phosphorus (P) availability is the major constrain in obtaining optimum crop yield in calcareous soils due to its precipitation as dicalcium and octacalcium phosphate by reacting with Ca +2 and Mg +2 . Therefore, we explored the role of phosphate solubilizing bacteria (without and with PSB @ 2 kg ha −1 ) in optimizing maize yield and P availability from soluble and insoluble P sources applied @ of 100 kg P 2 O 5 into calcareous soil. PSB inoculation significantly improved maize plant height (5.6%), 1,000 grain weight (11%), dry matter (7.5%), stover (10.8%) and grain yield (6.8%), plant P concentration (10.1%) and uptake (18.6%), extractable P (3.1%), agronomic (48%) and uptake (53%) P use efficiency over uninoculated plots. Phosphorus application significantly improved maize yield, soil health and agronomic P use efficiency (4.84 times over control); however, its impact was more pronounced when applied as 50% P each from farmyard manure (FYM) and single super phosphate (SSP). On the basis of overall performance, the sources were ranked as 50% FYM + 50% SSP >50% rock phosphate (RP) + 50% SSP > 100% SSP > 75% FYM + 25% SSP > 75% RP +25% SSP > 100% FYM > 100 RP > control. Interactively, a significant and maximum increased over absolute control in most of the soil and plant tested characteristics were observed when 100 kg P 2 O 5 ha −1 was supplemented 50% each as FYM and SSP along with PSB inoculation which was followed by 50% P each as FYM and SSP demonstr...