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首页> 外文期刊>Crop science >Effects of Sod Type, Irrigation, and Fertilization on Nitrate-Nitrogen and Orthophosphate-Phosphorus Leaching from Newly Established St. Augustinegrass Sod
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Effects of Sod Type, Irrigation, and Fertilization on Nitrate-Nitrogen and Orthophosphate-Phosphorus Leaching from Newly Established St. Augustinegrass Sod

机译：草皮类型，灌溉和施肥对新建立的圣奥古斯丁草皮草中硝酸盐氮和正磷酸盐-磷的浸出的影响

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Nitrogen and P leaching losses from fertilized turfgrass remain an environmental concern. In the present study, we examined the effects of sod type, fertilization, and irrigation on turf quality, NO3a€“N and PO4a€“P leaching following St. Augustinegrass [Stenotaphrum secundatum (Walt.) Kuntze] sod installation. Treatments included muck- vs. sand-produced sod, no fertilization, fertilization with 4.9 g N ma?’2 at installation or at 30 d after installation (DAI), and routine irrigation or irrigation at stress from 30 to 60 DAI. Drainage was collected from lysimeters installed in each plot and analyzed for NO3a€“N and PO4a€“P to determine total leaching losses. Across all treatments, drainage averaged 290, 902, and 604 mm during each of the three trials. Fertilization at 30 DAI significantly reduced PO4a€“P leaching losses compared to fertilization at 0 DAI. Muck sod type significantly reduced the quantity of NO3a€“N leached. Muck sod also significantly reduced PO4a€“P leached and resulted in better turf quality in two of the three trials. In the context of minimizing nutrient leaching, these results support the use of muck-grown sod established during low rainfall periods with fertilization delayed at least 30 DAI and with judicious use of irrigation.
机译：受精草坪草的氮和磷淋失仍然是环境问题。在本研究中，我们研究了草皮类型，施肥和灌溉对草坪草质量，St。Augustinegrass [Stenotaphrum secundatum（Walt。）Kuntze]草皮安装后NO3a，N和PO4a，P淋溶的影响。处理方法包括：渣土与沙子生产的草皮，不施肥，在安装时或安装后30 d施以4.9 g Nma？2的肥料（DAI），以及常规灌溉或在30 DAI至60 DAI的压力下灌溉。从安装在每个样区的渗漏计中收集排水并分析NO3a，N和PO4a，P的含量，以确定总浸出损失。在所有治疗中，三个试验中的每个试验平均引流290、902和604 mm。与0 DAI施肥相比，在30 DAI施肥显着降低了PO4a和P的淋失损失。污泥草皮类型显着减少了NO3a·N的浸出量。在三个试验中的两个试验中，草皮草还显着减少了PO4a / P淋溶，并提高了草皮质量。在最大程度减少养分浸出的情况下，这些结果支持使用在低降雨时期建立的渣土草皮，施肥至少延迟30 DAI，并明智地使用灌溉技术。

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