草原与草坪
草原與草坪
초원여초평
GRASSLAND AND TURF
2013年
5期
66-71
,共6页
高尔夫球场%果岭%根层基质%导水率%土壤分析
高爾伕毬場%果嶺%根層基質%導水率%土壤分析
고이부구장%과령%근층기질%도수솔%토양분석
golf course%putting greens%root zone medium%water conductivity%soil analysis
泥炭/砂混合物是一种广泛应用于高尔夫果岭坪床,运动场草坪,园艺盆栽,及滤水系统中的基质。然而,对于泥炭/砂混合基质水力特性的直接测量耗时较长。试验的目的为：(1)测试符合美国高尔夫协会(USGA)推荐标准的砂与高比例泥炭混合基质的饱和导水率(Ksat )是否为层流并遵循达西法则。(2)研究泥炭类别和有机物含量对之前建立的预测饱和导水率的多重线性回归模型的准确性的影响。试验采用3种泥炭类别即木本泥炭藓(Peat,Inc.Minnesota,USA),苔藓泥炭(Sun Gro Horticul-ture,Maryland,USA)和苇苔泥炭(Dakota Peat,North Dakota,USA),并分别按照泥炭占0%,0.2%,0.4%,0.8%,1.6%,4%,8%和10%的重量配比与纯砂混合。试验评估的模型如下：Log10(Ksat)=5.3407-0.5286ρb-1.2846 CP-0.0442c+0.0612φ5-0。6095φ95,其中ρb为容重(g/cm3),CP 为毛管孔隙度(%),c为粉粒含量(%),φ5,φ10,φ16,φ84,φ95为土壤粒径分布曲线分析中以 phi (φ)为单位的粒径参数,其中φx=-log (2,d),x代表筛析法测定下直径小于 d 的颗粒所占重量百分比。结果表明：在液压压力梯度小于3的范围内,混合基质饱和导水率为层流并遵循达西法则。结果也表明：除了含有配比超过4%的腐殖化程度低的苔藓泥炭混合基质外,对于有机物含量在0%~10%的泥炭/砂混合基质,该模型对饱和导水率的预测结果与实际测定结果符合度较好(R2=0.74)。
泥炭/砂混閤物是一種廣汎應用于高爾伕果嶺坪床,運動場草坪,園藝盆栽,及濾水繫統中的基質。然而,對于泥炭/砂混閤基質水力特性的直接測量耗時較長。試驗的目的為：(1)測試符閤美國高爾伕協會(USGA)推薦標準的砂與高比例泥炭混閤基質的飽和導水率(Ksat )是否為層流併遵循達西法則。(2)研究泥炭類彆和有機物含量對之前建立的預測飽和導水率的多重線性迴歸模型的準確性的影響。試驗採用3種泥炭類彆即木本泥炭蘚(Peat,Inc.Minnesota,USA),苔蘚泥炭(Sun Gro Horticul-ture,Maryland,USA)和葦苔泥炭(Dakota Peat,North Dakota,USA),併分彆按照泥炭佔0%,0.2%,0.4%,0.8%,1.6%,4%,8%和10%的重量配比與純砂混閤。試驗評估的模型如下：Log10(Ksat)=5.3407-0.5286ρb-1.2846 CP-0.0442c+0.0612φ5-0。6095φ95,其中ρb為容重(g/cm3),CP 為毛管孔隙度(%),c為粉粒含量(%),φ5,φ10,φ16,φ84,φ95為土壤粒徑分佈麯線分析中以 phi (φ)為單位的粒徑參數,其中φx=-log (2,d),x代錶篩析法測定下直徑小于 d 的顆粒所佔重量百分比。結果錶明：在液壓壓力梯度小于3的範圍內,混閤基質飽和導水率為層流併遵循達西法則。結果也錶明：除瞭含有配比超過4%的腐殖化程度低的苔蘚泥炭混閤基質外,對于有機物含量在0%~10%的泥炭/砂混閤基質,該模型對飽和導水率的預測結果與實際測定結果符閤度較好(R2=0.74)。
니탄/사혼합물시일충엄범응용우고이부과령평상,운동장초평,완예분재,급려수계통중적기질。연이,대우니탄/사혼합기질수력특성적직접측량모시교장。시험적목적위：(1)측시부합미국고이부협회(USGA)추천표준적사여고비례니탄혼합기질적포화도수솔(Ksat )시부위층류병준순체서법칙。(2)연구니탄유별화유궤물함량대지전건립적예측포화도수솔적다중선성회귀모형적준학성적영향。시험채용3충니탄유별즉목본니탄선(Peat,Inc.Minnesota,USA),태선니탄(Sun Gro Horticul-ture,Maryland,USA)화위태니탄(Dakota Peat,North Dakota,USA),병분별안조니탄점0%,0.2%,0.4%,0.8%,1.6%,4%,8%화10%적중량배비여순사혼합。시험평고적모형여하：Log10(Ksat)=5.3407-0.5286ρb-1.2846 CP-0.0442c+0.0612φ5-0。6095φ95,기중ρb위용중(g/cm3),CP 위모관공극도(%),c위분립함량(%),φ5,φ10,φ16,φ84,φ95위토양립경분포곡선분석중이 phi (φ)위단위적립경삼수,기중φx=-log (2,d),x대표사석법측정하직경소우 d 적과립소점중량백분비。결과표명：재액압압력제도소우3적범위내,혼합기질포화도수솔위층류병준순체서법칙。결과야표명：제료함유배비초과4%적부식화정도저적태선니탄혼합기질외,대우유궤물함량재0%~10%적니탄/사혼합기질,해모형대포화도수솔적예측결과여실제측정결과부합도교호(R2=0.74)。
Sand and peat mixtures are widely used in constructed root zones of golf course putting greens and sports fields,containerized horticulture,and water filtering systems.Direct measurement of hydraulic properties often is time consuming.One of the objectives of this study was to test if saturated water flow is laminar and o-beys Darcy's law when a large amount of peat is mixed with sand that conform to the USGA specifications.An-other objective was to evaluate a previously developed multiple linear regression (MLR)model for predictingsat-urated water conductivity (Ksat)as affected by peat types and organic matter (OM)content.Woody sphagnum peat (Peat,Inc.Minnesota,USA),sphagnum peat moss (Sun Gro Horticulture,Maryland,USA),and reed sedge peat (Dakota Peat,North Dakota,USA)were mixed with sand at 0%,0 .2%,0 .4%,0 .8%,1 .6%, 4%,8%,and 10% (w/w)in the final mixtures.The model tested wasLog10(Ksat)=5.340 7-0.528 6ρb-1. 2846CP-0.044 2c+0.0612φ5-0.6095φ95,withρb as bulk density (g/cm3),CP as capillary porosity (%),c as silt content (%),andφ5 ,φ10 ,φ16 ,φ84 ,φ95 values from the particle size distribution curve representing grain size in phi (φ)unit.Briefly,φx= -log (2 ,d),with x representing the percentage of sand mass smaller than d in size in a traditional particle size distribution curve.Results showed that Darcy's law prevailed at hydraulic pressure gradients up to 3 .Results also showed that,with exception of less humified sphagnum peat moss at >4%,the model provided fair predictions of Ksat (R2=0 .7 4 )for OM content up to 1 0%.
