UJI AKTIVITAS BAKTERI PELARUT FOSFAT TERHADAP KELARUTAN FOSFAT PADA TANAH SALIN

Jurnal Tanah dan Sumberdaya Lahan Pub Date : 2022-07-01 DOI:10.21776/ub.jtsl.2022.009.2.1

Nisa Hidayahtulloh, T. Setiawati

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Abstract

The high salt content in saline soils is the main cause of low salinity soil fertility, especially phosphorus nutrients. The application of phosphate-solubilizing bacteria in saline soil is one method to increase phosphate availability in saline soils. The study consisted of two tests, namely (1) qualitative and quantitative testing of phosphate-solubilizing bacteria in saline conditions and (2) testing of the activity of phosphate solubilizing bacteria in saline soil. This study used Pseudomonas sp. and Bacillus valezensis (Soil Biology Laboratory collection), Inceptisol saline soil from Banongan and Agel Situbondo. The study aimed to determine the activity of phosphate-solubilizing bacteria on the solubility of phosphate in saline soil. The results showed that: (1) Pseudomonas sp. and Bacillus valezensis have a solubility index of 1.25 to 2.68 on solid Pikovskaya medium with some NaCl concentration. Quantitatively test on liquid Pikovskaya medium, water-soluble phosphate concentration about 4.84 ppm to 14.18 ppm and soluble phosphate (extract Bray) between 15.91 ppm to 21.58 ppm. In addition, (2) on saline soil showed that Pseudomonas sp. and Bacillus valezensis could increase phosphate availability by 11.61% to 72,89%. Based on the study results, the genus Pseudomonas sp. and Bacillus valezensis have the potential to increase phosphate availability in saline soils.

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测试土壤中磷酸溶解细菌的活性

盐渍土含盐量高是造成土壤肥力低的主要原因，尤其是磷养分。在盐渍土中应用溶磷菌是提高盐渍土磷素有效性的一种方法。本研究包括两项试验，即(1)盐渍条件下增磷细菌的定性和定量试验和(2)盐渍土壤中增磷细菌活性试验。本研究以巴农安和阿格尔斯图邦多的绿脓杆菌(Pseudomonas sp.)和芽孢杆菌(Bacillus valezensis，土壤生物学实验室收集)为研究对象。本研究旨在测定磷酸盐增溶菌对盐渍土壤中磷酸盐溶解度的影响。结果表明:(1)假单胞菌和芽孢杆菌在一定NaCl浓度的固体Pikovskaya培养基上的溶解度指数为1.25 ~ 2.68。定量测试在液态Pikovskaya培养基上，水溶性磷酸盐浓度约为4.84 ppm至14.18 ppm，可溶性磷酸盐(Bray提取物)在15.91 ppm至21.58 ppm之间。此外，(2)在盐渍土上，假单胞菌和芽孢杆菌可使磷素有效性提高11.61% ~ 72,89%。根据研究结果，假单胞菌属和芽孢杆菌具有提高盐碱地磷素有效性的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Jurnal Tanah dan Sumberdaya Lahan

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