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首页> 外文会议>International turfgrass research conference >PHOSPHORUS AND NITROGEN RATE EFFECTS FOR TURFGRASS SOD ESTABLISHED ON A PHOSPHORUS DEFICIENT SOIL
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PHOSPHORUS AND NITROGEN RATE EFFECTS FOR TURFGRASS SOD ESTABLISHED ON A PHOSPHORUS DEFICIENT SOIL

机译：在磷缺乏土壤中建立草坪草皮的磷和氮速率影响

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Phosphorus (P) is an essential nutrient for plant growth.Research has shown that when establishing turfgrass from seed,P applications increase top and root growth and increase seedling density.There has been less research on the effect of P applications on turfgrass establishment from sod.The objective was to determine the effect of nitrogen (N) and P applications on Kentucky bluegrass (Poa pratensis L.) sod planted on a high clay,low P sub-soil representative of newly constructed landscapes.Treatments included 98,156,and 208 kg N ha-1 yr-1 and 0,24,and 48 kg P2O5 ha-1 yr-1.The 98 kg N ha-1 yr-1 treatment had the lowest clipping yields,color,and quality ratings throughout the research.For a Kentucky bluegrass lawn where dark green color is not critical and lower clipping yields are desirable,the 98 kg N ha-1 yr-1 rate is recommended.If a dark green color is important for the appearance of the lawn and higher clipping yields are not problematic,the 208 kg N ha-1 rate would be best.Soil P in the sod thatch layer was 58 mg kg-1 and likely resulted in the lack of turfgrass response to P applications.For sod grown on soil that is high in P our research concludes that after transplanting to a low P soil there may not be a response to P applications.
机译：磷（P）是植物生长的必要营养素。研究表明，在从种子中建立草坪草时，P应用增加了顶部和根系生长，提高了幼苗密度。对来自SOD的草坪草建立的P应用效果较少。目的是确定氮气（N）和P应用对新建景观的高粘土，低P亚土壤的肯塔基州蓝草（POA Pratensis L.）SOD的影响。包括98,156和208千克的加法N HA-1 YR-1和0.24和48kg P2O5 HA-1 YR-1.整个研究中的98kg N HA-1 YR-1处理具有最低的剪裁产量，颜色和质量评级。一个肯塔基蓝草草坪，暗绿色不是临界的，需要较低的剪裁产量，建议98kg n ha-1 Yr-1速率。如果暗绿色对于草坪外观和更高的剪裁产量很重要。没有问题，208 kg n ha-1速率将是最好的.seil SOD Thech层中的p是58mg kg-1，可能导致缺乏对p应用的草坪草响应。在P的土壤上生长，我们的研究得出结论，在移植到低p土壤后，可能没有对P应用的响应。

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