Abstract The purpose of this study was absorption spectrometric assessment the soil health of the soil from the taro growing areas of Taveuni, Fiji. The soil samples were collected in four cycles during taro cultivation period. The soil samples were analyzed for macronutrients (Ca, Mg, K, P and NO3–-N), soil organic matter (SOM) and soil pH. In general, the soil pH at all sites showed lower than the ideal pH (5.6–6.6) for taro planting throughout the cropping cycle. The results showed the significant loss in SOM from taro planting (15.41%) till harvesting (5.63%). Pronounced decrease in levels NO3–_N (18.29 to 13.86 mg kg−1), P (45.97 to 25.71 mg kg−1), K (77.90 to 22.96 mg kg−1), Ca (62.20 to 27.59 mg kg−1) and Mg (316.10 to 121.48 mg kg−1) were recorded from planting till harvesting for different sites. There was significant reduction in the soil macronutrients and SOM in all the four study sites and some sites showed below critical level and critical to medium levels of these nutrients in the soil at the end of the harvesting period of taro. The statistical analysis of the soil test data confirmed the declining trend of the soil health on the island of Taveuni, Fiji.

中文翻译：

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芋头作物生产过程中土壤健康的吸收光谱常量营养素审查

摘要 本研究的目的是对斐济塔韦乌尼芋头种植区土壤的土壤健康状况进行吸收光谱评估。土样在芋栽培期间分四次采集。对土壤样品进行了常量营养素（Ca、Mg、K、P 和 NO3--N）、土壤有机质 (SOM) 和土壤 pH 值的分析。一般来说，在整个种植周期中，所有地点的土壤 pH 值都低于芋头种植的理想 pH 值（5.6-6.6）。结果表明，从芋头种植（15.41%）到收获（5.63%），SOM 显着减少。NO3–_N（18.29 至 13.86 mg kg-1）、P（45.97 至 25.71 mg kg-1）、K（77.90 至 22.96 mg kg-1）、Ca（62.20 至 27.59 mg kg-1）和不同地点从种植到收获的Mg（316.10至121.48 mg kg-1）被记录。所有四个研究地点的土壤常量营养素和 SOM 均显着减少，一些地点在芋头收获期结束时土壤中这些营养素的含量低于临界水平和临界至中等水平。土壤测试数据的统计分析证实了斐济塔韦乌尼岛土壤健康呈下降趋势。