Potential of Phosphorus Solubilizing Purple Nonsulfur Bacteria Isolated from Acid Sulfate Soil in Improving Soil Property, Nutrient Uptake, and Yield of Pineapple (Ananas comosus L. Merrill) under Acidic Stress

Abstract

This study aimed to (i) evaluate purple nonsulfur bacteria (PNSB) strains possessing the highest phosphorus (P) solubilizing capacity in field and (ii) determine the efficacy of PNSB biofertilizers in improving soil quality, P uptake, growth, and yield of pineapple cultivated in acid sulfate soil (ASS). A field experiment was conducted in a completely randomized block design with two factors, including the first factor as P fertilizer levels (0, 50, 75, and 100% P) based on recommended fertilizer formula (RFF) and the second factor as supplementation of biofertilizers containing P solubilizing PNSB (no inoculated PNSB, Rhodobacter sphaeroides W48, R. sphaeroides W42, and a mixture of R. sphaeroides W48 and W42). The results indicated that the supplementation of PNSB biofertilizers led to an increase of 25.3–33.9% in soluble P concentration in soil compared to control treatment. Among the selected PNSB strains, R. sphaeroides W42 and a mixture of the PNSB in biofertilizers solubilized all insoluble P fractions (Fe-P, Al-P, and Ca-P) and strain W48 in biofertilizers for Fe-P and Al-P. Furthermore, the supplementation of biofertilizers from R. sphaeroides W48 and W42 individually and their mixture raised plant height by 3.56–4.10% and available P concentration by 25.3–33.9%. Total P uptake in pineapple treatments with biofertilizers from mixed PNSB was 42.9% higher than that in the control treatment ( p < 0.05 ). Application of mixed PNSB strains can reduce 25% P of chemical fertilizer, but the pineapple yield rose over 12.1%. Both R. sphaeroides W48 and W42 are potent for use as crop yield enhancers to obtain the sustainable pineapple cultivation under acidic stress.

Phosphorus-solubilizing bacterial endophytes, Burkholderia silvatlantica L-VT09 and N-VT06, in improving characteristics of acid sulfate soil and pineapple yield

“…The treatment supplied with bacteria had higher sugar content and water content than the treatment without bacteria. This was consistent with the study by Huu et al (2022). Moreover, in the treatment supplied with bacteria, values of L* and a* were higher than those in the treatment without bacteria, while b* values followed an opposite trend (Table 8).…”

“…Growth features were determined at harvesting when 20 plants were ran domly collected from each treatment and measured following the method of Huu et al (2022).…”

“…Twenty fruits were randomly derived from each treatment and recorded for yield components, yield, and fruit quality analysis at harvesting. Fruit diameter (cm), fruit length (cm), fruit weight (g), and yield (t ha -1 ) were calculated according to Huu et al (2022). Fruit quality parameters, namely, water content (mL), juice pH, and fruit color, were measured following the method of Huu et al (2022).…”

“…Fruit diameter (cm), fruit length (cm), fruit weight (g), and yield (t ha -1 ) were calculated according to Huu et al (2022). Fruit quality parameters, namely, water content (mL), juice pH, and fruit color, were measured following the method of Huu et al (2022). The total acid content (mg L -1 ) measurement followed the method of Guerrant et al (1982); sugar content (°Brix) was measured according to Saini et al (2001).…”

Improvement of Nutrient Uptake, Yield of Black Sesame (Sesamum indicum L.), and Alluvial Soil Fertility in Dyke by Spent Rice Straw from Mushroom Cultivation as Biofertilizer Containing Potent Strains of Rhodopseudomonas palustris

“…as biofertilizers in paddy felds have been reported to improve adverse efects of soil environments such as acidity, salinity, and toxicity [23][24][25][26][27][28][29] to enhance rice growth at diferent stages [25][26][27][28][30][31][32][33] and also rice productivity [29,33]. Additionally, the PNSB promoted the growth of various crops such as sweet herb Stevia rebaudiana [34], cucumber seedling [35,36], and pineapple [37]. Regarding previous studies, it has been suggested that the PNSB can be applied in both wetland and cultivated soils for annual crops; thereby, it would be worth to explore their roles for promoting growth and yield of sesame, particularly in dyked AS.…”