| 摘要: |
| 为了研究草坪修剪管理的节水效果,采用自制小型排水式蒸渗仪测定了早熟禾、高羊茅、黑麦在充分供水条件下不同修剪留茬高度的生长量和相应的蒸散量。结果表明:3种草坪草试验期内的生长量均随修剪留茬高度的增大而减小,留茬高度5、101、5 cm时其平均生长量分别为1 6611、345和972 kg/hm2;而耗水量均随修剪留茬高度的增大而增加,3种草坪草修剪留茬高度为5 cm时较不修剪时耗水量分别减少36.78%(早熟禾)、34.02%(高羊茅)、33.54%(黑麦)。降低修剪留茬高度可显著减少草坪耗水量,增加草坪草生长量。 |
| 关键词: 草坪 修剪 留茬高度 耗水量 生长量 |
| DOI：10.11841/j.issn.1007-4333.2007.04.081 |
| 修订日期：2006-11-09 |
| 基金项目:国家重点基础研究发展计划(973计划) |
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| Experiments on visual quality of turf grass under different mowed heights |
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| Abstract: |
| To improve the water efficiency in turf management,we studied the effects of mowed heights(5,10,15 cm and no mowing) of turf grass on the harvested dry biomasses and the water consumptions with 3 grass species(Poa pratensis,Festuca arundinacea,Lolium perenne) using portable lysimeters under full water supply condition.The results indicated that water consumption increases with the grass height but decrease for the harvested dry biomasses though their reduction quantities were varied for different species.The average harvested dry biomass for grasses was 1 661 kg/hm2(under 5 cm mowed height),1 345 kg/hm2(under 10 cm mowed height) and 972 kg/hm2(under 15 cm mowed height) respectively.The reductions in water consumption for grasses mowed to 5 cm height are 36.78%(Poa pratensis),34.02%(Festuca arundinacea) and 33.54%(Lolium perenne) respectively and lower than those for the un-mowed grass.The results show that grass mowing can reduce water consumptions and increase harvested dry biomasses. |
| Key words: turf,mowing,mowed height,water consumption,harvested dry biomass |
