Cereibacter sphaeroides ST16 and ST26 were used to solubilize insoluble P forms to improve P uptake, growth, and yield of rice in acidic and extreme saline soil

• Published in: Open agriculture Vol. 9; no. 1; pp. 445 - 53
• Main Authors: Dat, Le Tien, Huong, Truong Thi Cam, Xuan, Ly Ngoc Thanh, Quang, Le Thanh, Thao, Pham Thi Phuong, Thi Xuan, Do, Khuong, Nguyen Quoc
• Format: Journal Article
• Language: English
• Published: De Gruyter 27.09.2024
• Subjects: phosphorus nutrient; phosphorus solubilizing bacteria; purple nonsulfur bacteria; rice; saline soil
• ISSN: 2391-9531; 2391-9531
• DOI: 10.1515/opag-2022-0353

Soluble phosphorus (P) and P uptake are heavily affected by adverse conditions, such as salinity and acidity. The study aimed to evaluate the effects of P-solubilizing purple nonsulfur bacteria (PSPNSB) on soil characteristics, P uptake, growth, and yield of rice planted in saline soil in Thoi Binh – Ca Mau under greenhouse conditions. The pot experiment was completely randomized in blocks with two factors. Factor A was the rate of phosphorus chemical fertilization at 0, 25, 50, 75, and 100% P according to the recommendation. Factor B was the PSPNSB including a single strain of ST16 or ST26 and a mixture of them. The soluble P in soil increased by 16.4–18.2% when ST16 and ST26 were supplied singly or in the mixture, leading to the increase in total P uptake in rice by 19.2–30.1% in two continuous crops. Moreover, the growth and yield components of rice were also improved, leading to an increase in rice grain yield by 7.20–17.7%. Moreover, supplying the strains reduced Na in soil and Na content in stem, leaves, and grains, leading to the reduction in proline content in rice. Supplying the ST16 and ST26 or their mixture replaced 100% P fertilizer but still ensured the rice grain yield. Further approaches should be made to investigate the possibility of the potent strains replacing chemical P fertilizers under field conditions.