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土壤盐渍化是草坪管理中危害草坪草健康的严重问题。盐渍化是由于灌溉用的再生水等非传统水源常含有较高的盐分。在土壤可交换钠累积高的情况下,用雨水或者清水灌溉会导致土壤颗粒分散,降低土壤水分入渗与渗透。试验目的为:研究灌溉用水中的盐分组成对高尔夫果岭根层基质及根基系统的饱和导水率(Ksat)的影响。试验对粘土(Fargo,North Dakota,USA),粘壤土(Garick Corp.,Cleveland,OH)和泥炭/砂混合物(Dakota Peat,North Dakota,USA)(90/10v/v),其在3种根层的基质建筑系统40cm深自然型果岭,USGA标准的泥炭/砂基果岭的30cm根层和10cm砾石层和加利福尼亚标准果岭的40cm深泥炭/砂根层进行了测定。材料经过5个钠吸附率水平(SARw)(0,2.5,5.0,15.0,and∞)溶液的淋洗预处理或灌溉后测定了饱和导水率。除SARw0外,所有溶液的导电度(ECw)都为11.0dS/m。结果表明:使用SARw>5的溶液灌溉淋洗易导致粘土和粘壤土发生较严重的土壤颗粒分散。实验室测定虽然可以估测土壤分散的严重程度,但还需进一步的研究来量化土壤有机物含量和粘土矿物组成对其影响。总之,用于加利福尼亚和USGA标准果岭根层的泥炭/砂混合物不易产生由含盐灌溉水源导致的土壤结构分散及饱和导水率降低。
Soil salinization is a serious problem that hampers turfgrass health in turfgrass management. Salinization is due to the non-traditional sources of water, such as reclaimed water, often containing higher salinity. Irrigation with rainwater or clear water, with high soil exchangeable sodium accumulation, can lead to the dispersion of soil particles and reduce soil water infiltration and infiltration. The purpose of the experiment was to investigate the effect of salt composition in irrigation water on the saturated hydraulic conductivity (Ksat) of golf-tree root matrix and root system. The test was conducted on three types of roots (Fargo, North Dakota, USA), clay loam (Garick Corp., Cleveland, OH) and peat / sand mix (Dakota Peat, North Dakota, USA) The 40 cm deep natural type greens of the matrix building system of the layer, the 30 cm root layer of the USGA standard peat / sand base green and the 10 cm gravel layer and the 40 cm deep peat / sands layer of the California standard green were measured. The material was tested for saturated hydraulic conductivity after 5 pretreatments or irrigation with 5 sodium sorbent levels (SARS) (0, 2.5, 5.0, 15.0, and ∞) solutions. The electrical conductivity (ECw) of all solutions except for SARwO was 11.0 dS / m. The results show that the solution irrigation with SARw> 5 can lead to more serious soil particle dispersion in clay and clay loam. Laboratory measurements Although the degree of soil dispersion can be estimated, further research is needed to quantify the effects of soil organic matter content and clay mineral composition. In summary, peat / sand mixes used in the California and USGA standard green root layers are less prone to soil structural dispersion and reduced saturated hydraulic conductivity due to saline irrigation sources.