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TURFGRASS SCIENCE

Stolon Growth and Dry Matter Partitioning Explain Differences in Zoysiagrass Establishment Rates

^a Dep. of Horticulture, Univ. of Arkansas, 316 Plant Sci. Bldg., Fayetteville, AR 72701
^b Dep. of Agron., Purdue Univ., 915 W. State St., West Lafayette, IN 47907-2054. Purdue Univ. Agriculture Experiment Station Journal 2006-18054

^* Corresponding author (ajpatton{at}uark.edu).

A barrier to widespread zoysiagrass (Zoysia spp.) use is its slow establishment rate. Our objectives were to quantify differences in establishment rate of zoysiagrass cultivars and genotypes as well as determine the underlying factors associated with differential growth rates. Thirty-five genotypes of zoysiagrass were transplanted into field plots in June 2004 and 2005. Establishment rate and stolon growth of zoysiagrass genotypes were measured in the field and then four cultivars with contrasting establishment rate were used for further growth analysis in a growth chamber. Mean establishment rate [log_e (coverage) d^–1] and coverage (cm²) 91 d after planting (DAP) in the field were faster for Z. japonica than Z. matrella genotypes. The Z. japonica Genotype 6186 had the greatest coverage 91 DAP. ‘El Toro’, ‘Chinese Common’, and ‘Palisades’ were among the Z. japonica genotypes that produced more coverage 91 DAP than the mean (1943 cm²), while ‘Meyer’ produced less coverage than the mean. ‘Zorro’ was among the fastest establishing Z. matrella genotypes, and ‘Diamond’ was the slowest. Growth analysis indicated El Toro and Zorro, which establish faster than Meyer and Diamond, partition more dry matter to stolons and rhizomes than leaves. This is consistent with field data where El Toro and Zorro have greater total stolon length than Meyer and Diamond. Zoysiagrass genotypes that partition more dry matter to stems instead of leaves establish the quickest.

Abbreviations: CGR, crop growth rate • DAP, days after plugging • DIA, digital image analysis • LAR, leaf area ratio • LSD, least significant difference • LWR, leaf weight ratio • RGR, relative growth rate • RWR, root weight ratio • SLA, specific leaf area • SWR, stem weight ratio • ULR, unit leaf rate.

This article has been cited by other articles:

				A. J. Patton and Z. J. Reicher Zoysiagrass Species and Genotypes Differ in Their Winter Injury and Freeze Tolerance Crop Sci., July 30, 2007; 47(4): 1619 - 1627. [Abstract] [Full Text] [PDF]