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- Title
Short‐term soil carbon mineralization on golf course sand‐based putting green and its effect on creeping bentgrass nitrogen uptake.
- Authors
Zhou, Qiyu; Soldat, Douglas J.; Ruark, Matthew D.
- Abstract
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. Core Ideas: Soil mineralizable C was not predictive of creeping bentgrass growth or N uptake on sand‐based putting greens.Soil mineralizable C was substantially influenced by sampling depths on sand‐based putting green.Environmental variables including air temperature, soil temperature, and soil moisture affected soil mineralizable C of sand‐based putting greens.
- Subjects
VERONA (Italy); SOIL moisture; SOIL creep; AGROSTIS; MINERALIZATION; SOIL temperature; SAND waves
- Publication
Crop Science, 2024, Vol 64, Issue 2, p1051
- ISSN
0011-183X
- Publication type
Article
- DOI
10.1002/csc2.21169