Correlation between Solvita Labile Amino-Nitrogen and CO<sub>2</sub>-Burst Soil Health Tests and Response to Organic Fertilizer in a Turfgrass Soil

Moore, David B.; Guillard, Karl; Morris, Thomas F.; Brinton, William F.

doi:10.1080/00103624.2019.1689258

Cited by 6 publications

(12 citation statements)

References 28 publications

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“…Unlike microbial biomass, both N fertilizer rates and humic products affected potentially mineralizable pools of C and N. Greater N fertilizer rates increased PMC by 40% and 37% relative to reduced N rates and treatments that received no N, respectively. Moore et al [75] reported that increasing N rates resulted in increasing PMC, which is consistent with the results found in this experiment. This is in contrast to other studies showing N fertilizer having no effect or decreasing PMC [62,66,73,76].…”

Section: Turfgrass Soil Healthsupporting

confidence: 92%

“…Liu et al [62] reported that N fertilizer had no effect on PMN and Yao et al [66] found that N fertilizer reduced PMN. However, Moore et al [75] found that increasing N fertilizer rates increased biological active N or PMN, which is similar to the results in this paper. In addition, fertilizer treatments that had an increased PMC also had a greater PMN.…”

Section: Turfgrass Soil Healthsupporting

confidence: 91%

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Evaluation of Humic Fertilizers Applied at Full and Reduced Nitrogen Rates on Kentucky Bluegrass Quality and Soil Health

et al. 2021

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Soil health and sustainable management practices have garnered much interest within the turfgrass industry. Among the many practices that enhance soil health and sustainability are applying soil additives to enhance soil biological activity and reducing nitrogen (N) inputs—complimentary practices. A two-year study was conducted to investigate if reduced N fertilizer rates applied with humic substances could provide comparable turfgrass quality as full N rates, and whether humic fertilizers would increase biological aspects of soil health (i.e., microbial biomass and activity). Treatments included synthetic fertilizer with black gypsum (SFBG), poly-coated humic-coated urea (PCHCU; two rates), urea + humic dispersing granules (HDG; two rates), urea, stabilized nitrogen, HDG, and a nontreated control. Reduced rates of N with humic substances maintained turfgrass quality and cover, and reduced clipping biomass compared to full N rates. There were no differences in soil physical and chemical properties besides soil sulfur (S) concentration. SFBG resulted in the highest soil S concentration. Fertilizer treatments had minimal effect on microbial biomass and other plant-available nutrients. However, PCHCU (full rate) increased potentially mineralizable carbon (PMC) and N (PMN) by 68% and 59%, respectively, compared to the nontreated control. Meanwhile SFBG and stabilized nitrogen also increased PMC and PMN by 77% and 50%, and 65% and 59%, respectively. Overall, applications of reduced N fertilizer rates with the addition of humic substances could be incorporated into a more sustainable and environmentally friendly turfgrass fertilizer program.

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Section: Turfgrass Soil Healthsupporting

confidence: 92%

Section: Turfgrass Soil Healthsupporting

confidence: 91%

Evaluation of Humic Fertilizers Applied at Full and Reduced Nitrogen Rates on Kentucky Bluegrass Quality and Soil Health

et al. 2021

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“…Furthermore, Moore et al. (2019a) reported that PMC increased with increasing N rates. The varying results in PMC response to N fertilizer may be a result of N rates, in which higher N (100–257 kg N ha −1 ) amounts decrease PMC, whereas small N (12.5–50 kg N ha −1 ) additions may increase PMC (Grandy et al., 2013; Moore et al., 2019b).…”

Section: Resultsmentioning

confidence: 98%

“…Moore et al. (2019a) found that increasing N rates corresponded with increased PMN or biological active N. Conversely, Yao et al. (2009) reported that PMN decreased with N fertilizer.…”

Section: Resultsmentioning

confidence: 99%

“…Potentially mineralizable N (PMN) is the inorganic N released during the incubation (Franzluebbers et al., 2018; McDaniel & Grandy, 2016). Both PMC and PMN can be an indicator of soil N‐supplying power, as has been shown with maize and turfgrass N response studies in the United States (Franzluebbers et al., 2018; McDaniel et al., 2020; Moore et al., 2019, 2019ab; Yost et al., 2018).…”

Section: Introductionmentioning

confidence: 81%

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Evaluation of humic fertilizers on a sand‐based creeping bentgrass putting green

et al. 2021

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Turfgrass with sand‐based root zones, such as golf course putting greens, are highly important economically and require intense management. However, problems are often associated with sand‐based root zones, such as low nutrient retention and limited microbial activity. Soil additives may increase soil biological activity, improve nitrogen (N) cycling efficiency, and thus reduce fertilizer N inputs. A 2‐yr experiment was conducted on a sand‐based creeping bentgrass (Agrostis stolonifera L.) putting green to investigate whether humic products could increase soil biological activity and improve turfgrass quality. Treatments included humic‐coated urea (HCU; 2/3 rate and full rate), HCU + humic dispersing granules (HDG), HCU + black gypsum (BG), urea, HDG, and a nontreated control. Minimal differences were seen in microbial biomass and activity besides HCU + BG. The HCU + BG had 60% greater potentially net N mineralization relative to the HDG and the nontreated control. Overall, incorporating humic substances with N fertilizer did not increase turfgrass quality, cover, and clipping biomass compared with N fertilizer alone. However, the addition of BG to N fertilizer enhanced microbial activity (i.e., potentially net N mineralization).

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Short‐term soil carbon mineralization on golf course sand‐based putting green and its effect on creeping bentgrass nitrogen uptake

Zhou,

Soldat,

Ruark

2024

Crop Science

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A rapid soil test for accurately estimating nitrogen (N) supply from soil organic matter would help turfgrass managers develop N fertilization programs. In this study, we tested the feasibility of using a quick test, mineralizable carbon (min‐C), to predict turfgrass growth and N uptake from sand‐based putting green soils. A 2‐year field experiment was conducted in Verona, WI, on four sand‐based research golf greens planted with creeping bentgrass. Nitrogen fertilizer was applied at 0, 10, and 20 kg ha−1 every 2 weeks as liquid urea during the growing seasons. Soil samples were collected at 0–5 cm and 5–10 cm and tested for min‐C by measuring the flush of CO2 following the rewetting dried soil, where the soil was rewetted at 50% water‐filled pore space and incubated at 25°C for 24 h. Min‐C was greater at the shallower soil depth, and unaffected by N rates that were applied. On‐site air temperature, soil moisture content, and estimated soil temperature were negatively related with min‐C, where r2 = 0.26–0.60 for air temperature, r2 = 0.32–0.71 for soil moisture content, and r2 = 0.16–0.53 for estimated soil temperature, indicating the test is quite sensitive to environmental conditions at the time of sampling. Furthermore, min‐C had weak positive to no relationship with creeping bentgrass growth rate (r2 = 0–0.17) and N uptake (r2 = 0–0.23) on sand‐based putting green, suggesting the test does not hold promise as a method for improving fertilizer decisions to these systems.

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Correlation between Solvita Labile Amino-Nitrogen and CO₂-Burst Soil Health Tests and Response to Organic Fertilizer in a Turfgrass Soil

Cited by 6 publications

References 28 publications

Evaluation of Humic Fertilizers Applied at Full and Reduced Nitrogen Rates on Kentucky Bluegrass Quality and Soil Health

Evaluation of Humic Fertilizers Applied at Full and Reduced Nitrogen Rates on Kentucky Bluegrass Quality and Soil Health

Evaluation of humic fertilizers on a sand‐based creeping bentgrass putting green

Short‐term soil carbon mineralization on golf course sand‐based putting green and its effect on creeping bentgrass nitrogen uptake

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Correlation between Solvita Labile Amino-Nitrogen and CO2-Burst Soil Health Tests and Response to Organic Fertilizer in a Turfgrass Soil

Cited by 6 publications

References 28 publications

Evaluation of Humic Fertilizers Applied at Full and Reduced Nitrogen Rates on Kentucky Bluegrass Quality and Soil Health

Evaluation of Humic Fertilizers Applied at Full and Reduced Nitrogen Rates on Kentucky Bluegrass Quality and Soil Health

Evaluation of humic fertilizers on a sand‐based creeping bentgrass putting green

Short‐term soil carbon mineralization on golf course sand‐based putting green and its effect on creeping bentgrass nitrogen uptake

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Product

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Correlation between Solvita Labile Amino-Nitrogen and CO₂-Burst Soil Health Tests and Response to Organic Fertilizer in a Turfgrass Soil