The use of synthetic pigment‐containing products on golf playing surfaces by golf course superintendents has increased dramatically to provide green color and improve stress tolerance. Most turf colorants are synthesized from various phthalocyanine pigments, which share visible spectral properties with green plant tissue. Vegetation indices, such as normalized difference (NDVI), are commonly used by researchers to quantify plant health or turf quality. Research reports indicate that turf canopy reflectance is sometimes positively and sometimes negatively affected by synthetic pigments. The specific spectral wavelength used for vegetation indices varies by sensor type, which may explain these inconsistencies. A greater understanding of light absorption characteristics of synthetic pigments is needed. Therefore, the research objectives were to determine the spectral properties of synthetic phthalocyanine pigment‐containing products alone and to quantify their influence on light reflected from treated creeping bentgrass canopies. Narrow bandwidth (1.5 nm) reflectance was collected from across visible and near‐infrared spectra using a handheld field spectroradiometer (PSR‐1100F, Spectral Evolution) to develop spectral signatures of pigmented products alone, healthy turf, and healthy turf treated with pigmented products. Synthetic pigment‐containing products strongly absorbed near‐infrared light but did not affect photosynthetically active spectra. Some products tested influenced reflectance of ultraviolet A radiation. Endogenous chlorophyll concentrations 7 d after treatment were not altered by products tested. Spectral characteristics of NDVI and similar reflectance measurements of creeping bentgrass quality using near‐infrared light may be negatively affected when the turf is treated with phthalocyanine pigment‐containing products.

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合成酞菁颜料对蠕动草的光反射率的影响

高尔夫球场管理者在高尔夫球场上使用的含有合成颜料的产品已大大增加，以提供绿色并提高耐应力性。大多数草皮着色剂是由各种酞菁颜料合成的，它们与绿色植物组织共享可见的光谱特性。研究人员通常使用植被指数（例如归一化差异（NDVI））来量化植物健康状况或草皮质量。研究报告表明，草皮冠层反射率有时会受到合成颜料的积极影响，有时会受到负面影响。用于植被指数的特定光谱波长因传感器类型而异，这可以解释这些不一致之处。需要对合成颜料的光吸收特性有更多的了解。因此，研究目标是确定仅含合成酞菁颜料的产品的光谱特性，并量化其对经过处理的creep草草冠层反射光的影响。使用手持式场光谱辐射计（PSR-1100F，Spectral Evolution）从可见光和近红外光谱中收集窄带宽（1.5 nm）反射率，以开发单独的色素产品，健康草皮和用色素产品处理过的健康草皮的光谱特征。含合成颜料的产品强烈吸收近红外光，但不影响光合活性光谱。测试的某些产品影响了紫外线A辐射的反射率。处理后7 d的内源性叶绿素浓度不受测试产品的影响。