日本SPAD—501型叶绿素计系日本农林水产省农蚕园艺局农产科土壤、作物分析仪器开发事业机构(简称SPAD)协同美能达照象机公司开发而得的新产品。据黑龙江省农业科学院水稻研究所引用结果,该叶绿素计体积小(70×212.3×37毫米)、重量轻(350克)、携带方便,测定方法简单,所得数据精确,适于各种作物及林木氮素营养诊断,尤其适于水稻,是看苗施肥实行科学种田的得力助手。可供科研、生产单位广泛应用。 Japan SPAD-501 chlorophyll meter Japan’s Ministry of Agriculture, Forestry and Fisheries Horticulture Horticulture Bureau Soil and crop analysis equipment development agency (SPAD) in collaboration with Minolta camera company developed a new product. According to the quoted results of Rice Research Institute of Heilongjiang Academy of Agricultural Sciences, the chlorophyll meter is small in size (70 × 212.3 × 37 mm) and light in weight (350 g), easy to carry and simple to measure. The obtained data are accurate and suitable for various crops and trees Nitrogen nutrition diagnosis, especially for rice, is the seedling fertilizer implementation of scientific farming effective assistant. For scientific research, production units widely used.