Rice (Oryza sativa L.) is the main food crop cultivated in Sri Lanka, and different varieties of rice are grown under different conditions of fertilizer application throughout the country. Since the consumption of rice is extremely high, it is considered as the major dietary source for macro- and micro-nutrients and also for toxic trace elements. The main objective of this study was to investigate and compare trace element levels in native and improved rice varieties that were grown under both organic and inorganic chemical fertilizers and also under unfertilized conditions. Rice grains were collected from a plot experiment with seven native and seven improved rice varieties that were treated with organic and inorganic fertilizers. Contents of macro-nutrients (Na, K, Ca and Mg) and trace elements (Cd, As, Pb, Cr, Mn, Co, Ni, Cu, Zn and Ba) in rice grains were measured by inductively coupled plasma mass spectrometry. The results indicated that rice cultivated using inorganic fertilizers showed the highest mean trace element contents while organic fertilizer–treated improved rice varieties showed the lowest Cd (0.10 mg/kg) which is lower than the maximum permissible level (0.2 μg g⁻¹). The highest mean value of Cd (0.32 mg/kg) was recorded in native rice varieties grown in plots with chemical fertilizer applications. However, the As content in rice samples collected from all treatment conditions indicated contents lower than the maximum permissible level. Rice cultivated in plots that were treated with chemical fertilizer showed the highest mean macro-nutrient contents.

水稻（水稻L.）是斯里兰卡种植的主要粮食作物，在全国不同肥料条件下种植了不同品种的水稻。由于大米的消耗量非常大，因此被认为是大量和微量营养素以及有毒微量元素的主要饮食来源。这项研究的主要目的是调查和比较在有机和无机化肥以及未施肥条件下种植的本地和改良水稻品种的微量元素含量。水稻籽粒是通过使用七个有机和无机肥料处理过的原生和七个改良水稻品种的田间试验收集的。常量营养素（Na，K，Ca和Mg）和微量元素（Cd，As，Pb，Cr，Mn，Co，Ni，Cu，用电感耦合等离子体质谱法测定大米中的锌和钡。结果表明，使用无机肥料种植的水稻平均微量元素含量最高，而使用有机肥料处理的改良水稻品种的Cd最低（0.10 mg / kg），低于最大允许水平（0.2μgg）。^-1）。在使用化肥的地块上种植的本地水稻品种中，Cd的最高平均值（0.32 mg / kg）被记录下来。但是，从所有处理条件收集的大米样品中的As含量均表明含量低于最大允许水平。在用化肥处理过的地块上种植的水稻显示出最高的平均常量养分含量。