Effects of amending an Ultisol with bambara groundnut seed residue on soil fertility, microbial nutrient cycling and yield of cucumber

Okebalama, Chinyere Blessing; Ibezim, Chukwunonso Odera; Ugwu, V.U.; Marschner, Bernd

doi:10.1080/01448765.2020.1808067

Cited by 6 publications

(6 citation statements)

References 30 publications

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“…The study result shows the potential of BSB to mainly induced C sequestration in the lma and mma fractions by about 122%; a confirmation of increased biochar-induced C storage in macro-aggregates (Wang et al, 2017). The high association of BSB to macro aggregates indicates optimized participation of BSB in soil macro aggregation; lending credence to the reported increased macro-aggregate stability with BSR (Okebalama et al, 2020a). Nevertheless, the overall TC improvement with BSB and NPK + RHB was substantial, amounting to 151, 110, 137 and 76% increase over the control in the lma, mma, sma and mia fractions, respectively.…”

Section: Distribution Of Aggregate Total C and N Concentrations In Tr...supporting

confidence: 63%

“…Available P and basic cations (Na + , K + , Ca 2+ , Mg 2+ ) concentrations of the BSB were low though their values increased slightly as compared to their counterparts in BSR. In contrast to BSB also, the elemental properties of the BSR input as described in Okebalama et al (2020a) showed major dissimilarities in pH 5.70, OC (53.21), TN (3.01) and C/N (30.31) parameters.…”

Section: Chemical Characteristics Of Previously Cropped Soil and Bamb...mentioning

confidence: 96%

“…The first phase of the field study consisted of a two-year continuous cultivation of cucumber under four rates (0, 10, 20 and 30 t ha -1 ) of BSR with three Okebalama et al (2019;2020a). replications (Okebalama et al, 2020a) while the second phase included a modification of the previous 12 BSR treatment plots of 1.50 × 3.75 m 2 each, with 1 m spacing between blocks. The study was conducted on the same piece of land during the 2017 minor and 2018 major cropping seasons.…”

Section: Experimental Set-up and Treatment Descriptionmentioning

confidence: 99%

“…This implies that BSB is a better choice as soil amendment than BSR. Thus, applying BSB input would be more advantageous because postharvest properties of the fertilized soils in years 2016 and 2018, suggest that N, P, K, and Mg nutrients were more available in the latter than in the former year (Okebalama et al, 2019;Okebalama et al, 2020a). As such, the maximal percent increase in TC, TN, K + , and Mg 2+ nutrients reserve with BSB than NPK + BSB proposes desirable agronomic benefits for farmers to boost OC and other nutrient reserves with BSB.…”

Section: Changes In Soil Chemical Properties With Treatmentmentioning

confidence: 99%

“…), a leguminous crop. However, application of bambara seed residue (BSR) as a nutrient source for cucumber cultivation was found unsuitable for continuous application in an Ultisol (Okebalama et al, 2020a). In addition, cucumber yield obtained with 30 t ha -1 BSR was low compared to other organic amendments.…”

Section: Introductionmentioning

confidence: 99%

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Impact of bambara seed residue biochar and NPK on soil fertility, aggregate carbon and nitrogen concentrations and yield of cucumber

Okebalama¹,

Asogwa²,

Uzoh³

et al. 2022

Agro-Sci.

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The mechanisms of biochar effects on soil and crop yield are still elusive. Assessing the influence of biochar on total carbon (TC) and total nitrogen (TN) concentrations in hierarchical soil aggregates could provide an explanation. In a randomized complete block design were control, bambara seed residue biochar (BSB), NPK and NPK + BSB treatments superimposed on a two-year bambara seed residue amended Ultisols, in a four-year continuous cucumber cultivation. The effects of the treatments on optimizing cucumber yield and soil sustainability parameters, particularly the aggregate- (4.75-2.00, 1.00-2.00, 0.25-1.00 and < 0.25 mm) associated TC and TN concentrations were studied. The BSB and NPK + BSB treatments significantly (p ≤ 0.05) increased the concentrations of TC by 113.79 and 104.60%; TN by 100 and 87.50%; and available P by 172% and 415%, respectively. Furthermore, both treatments significantly reduced exchangeable Al3+ but increased Mg2+ and soil moisture content 4-6 weeks after planting. Exchangeable K+ was significantly increased by BSB. The BSB and NPK + BSB significantly improved TC and TN in all aggregate fractions with minimal effect in the 0.25-1.00 mm fraction. However, the overall percentile TC and TN increase by these treatments was more in the macro- (4.75-0.25 mm) than in the micro (< 0.25 mm) aggregates. Application of BSB and NPK + BSB significantly improved cucumber fruit weight by 12- and 24-fold, respectively, compared to NPK treatment. The study demonstrated that BSB enhanced soil fertility, while NPK + BSB further improved cucumber productivity. In addition, these treatments have the potential to substantially sequester carbon and nitrogen more in macro- than micro- aggregates.

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Section: Distribution Of Aggregate Total C and N Concentrations In Tr...supporting

confidence: 63%

Section: Chemical Characteristics Of Previously Cropped Soil and Bamb...mentioning

confidence: 96%