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<p>Climate change has been affecting agriculture by decreasing farming areas, causing drought and pests, and threatening the sustainable development of agriculture. Simultaneously, the use of chemicals can cause more harms to the environment, while biological products show a safer alternative. Thus, the current study aimed to evaluate the potency of purple nonsulfur bacteria (PNSB) strains of both functions of nitrogen (N) fixing and phosphorus (P) solubilizing <i>Rhodopseudomonas palustris</i> VNW02, TLS06, VNW64, and VNS89 and potassium (K) dissolving <i>Rhodopseudomonas pentothenatexigens</i> TT07.4, AN05.1, and AC04.1 to reduce the use of chemical NPK fertilizers. The supplementations of liquid PNSB biofertilizer (LPB) and a commercial product, TSBio biofertilizer (TSB), were applied separately and combined with different levels of NPK fertilizers. The LPB increased N availability (NH<sub>4</sub><sup>+</sup>), P solubility, and K exchangeability by 1.80–5.20&#xa0;mg&#xa0;kg<sup>−1</sup>, 11.2–13.8&#xa0;mg&#xa0;kg<sup>−1</sup>, and 0.216–0.233&#xa0;meq 100&#xa0;g<sup>−1</sup> in comparison with the conventional fertilization. Moreover, the proline content decreased when the (LPB) was applied. Furthermore, the LPB when NPK was used 25% N, 50% P, and 50% K less, resulted in greater total N, P, and K uptake by 10.8, 13.3, and 13.7%, respectively, lesser total Al, Mn, and Fe uptake by 48.5, 25.4, and 43.8%, and greater yield by 9.15% in comparison with the conventional fertilization. Supplying 10 L ha<sup>−1</sup> of LPB into the rice seeds and the soil was recommended to reduce 25% N, 50% P, and 50% K for rice in acid sulfate soil. The LPB developed in this study should be further applied for commercial use and transferred to farmers’ fields. This could reduce the effects of climate change on crops, increase crop yield, and save production costs, ultimately improving farmers’ livelihood and conserving the soil and water environment.</p> Graphical Abstract <p></p>

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Effects of Rhodopseudomonas palustris and Rhodopseudomonas pentothenatexigens on reducing chemical NPK fertilizer used for rice in acid sulfate soil under field conditions

  • 期刊论文

  • 发表日期：

    2025年5月15日

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  • Nguyen Duc Trong,
  • Tran Thi Thuy Trang,
  • Le Thanh Quang,
  • Truong Oanh Oanh,
  • Phan Chi Nguyen,
  • Tran Chi Nhan,
  • Ly Ngoc Thanh Xuan,
  • Do Thi Xuan,
  • Nguyen Quoc Khuong

摘要

Climate change has been affecting agriculture by decreasing farming areas, causing drought and pests, and threatening the sustainable development of agriculture. Simultaneously, the use of chemicals can cause more harms to the environment, while biological products show a safer alternative. Thus, the current study aimed to evaluate the potency of purple nonsulfur bacteria (PNSB) strains of both functions of nitrogen (N) fixing and phosphorus (P) solubilizing Rhodopseudomonas palustris VNW02, TLS06, VNW64, and VNS89 and potassium (K) dissolving Rhodopseudomonas pentothenatexigens TT07.4, AN05.1, and AC04.1 to reduce the use of chemical NPK fertilizers. The supplementations of liquid PNSB biofertilizer (LPB) and a commercial product, TSBio biofertilizer (TSB), were applied separately and combined with different levels of NPK fertilizers. The LPB increased N availability (NH4+), P solubility, and K exchangeability by 1.80–5.20 mg kg−1, 11.2–13.8 mg kg−1, and 0.216–0.233 meq 100 g−1 in comparison with the conventional fertilization. Moreover, the proline content decreased when the (LPB) was applied. Furthermore, the LPB when NPK was used 25% N, 50% P, and 50% K less, resulted in greater total N, P, and K uptake by 10.8, 13.3, and 13.7%, respectively, lesser total Al, Mn, and Fe uptake by 48.5, 25.4, and 43.8%, and greater yield by 9.15% in comparison with the conventional fertilization. Supplying 10 L ha−1 of LPB into the rice seeds and the soil was recommended to reduce 25% N, 50% P, and 50% K for rice in acid sulfate soil. The LPB developed in this study should be further applied for commercial use and transferred to farmers’ fields. This could reduce the effects of climate change on crops, increase crop yield, and save production costs, ultimately improving farmers’ livelihood and conserving the soil and water environment.

Graphical Abstract