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通过田间试验 ,研究了不同水稻品种、类型及其产地间稻米中铁、锌、铜、锰、镁、钙含量的变异。结果表明 :①稻米中铁、锌、铜、锰、镁、钙平均含量的高低顺序为镁 >钙 >锌 >锰 >铜 >铁 ;不同品种间稻米中铁含量变异系数最大 ,其次为钙 ,锌含量变异系数最小 ;不同水稻类型间粳型品种稻米中铁、锌、铜、锰、镁、钙平均含量最高 ,其次为常规籼型品种 ,杂交籼型品种稻米中 6种矿质元素平均含量最低 ;②雅安和温江两产地 3供试品种稻米中铁、锌、铜、锰、镁、钙含量相对较高 ,会理 3供试品种稻米中 6种矿质元素含量相对较低 ;不同产地间稻米中铜含量变异系数最大 ,其次为铁 ,锌含量变异系数最小 ;③稻米中锰含量与土壤中碱解氮含量和 pH值显著负相关 ;土壤中速效钾含量与稻米中锌、铜含量极显著或显著负相关 ;稻米中镁含量与土壤中钙全量显著负相关 ;稻米中钙含量与土壤中铜全量显著负相关 ;稻米中锌含量与土壤中镁全量显著正相关
Field experiments were conducted to study the variations of iron, zinc, copper, manganese, magnesium and calcium in different rice varieties, types and their origin. The results showed as follows: (1) The order of the average content of iron, zinc, copper, manganese, magnesium and calcium in rice was magnesium> calcium> zinc> manganese> copper> iron; the variation coefficient of iron content was the highest among different varieties of rice, followed by calcium and zinc The average content of iron, zinc, copper, manganese, magnesium and calcium in the japonica rice varieties with different rice types was the highest, followed by the conventional indica varieties, and the lowest in the indica rice varieties. Ya’an The content of iron, zinc, copper, manganese, magnesium and calcium in the rice varieties of three cultivars of Wenjiang were relatively high. The contents of 6 mineral elements in Huili 3 were lower than those in other two producing areas. Coefficient of variation was the largest, followed by iron, and the coefficient of variation of zinc content was the smallest. ③ The content of manganese in rice was negatively correlated with the content of alkaline-hydrolyzable nitrogen and pH value in soil. The content of available potassium in soil was significantly or significantly negatively correlated with the content of zinc and copper in rice ; The content of magnesium in rice was significantly negatively correlated with the total amount of calcium in soil; the content of calcium in rice was negatively correlated with the total amount of copper in soil; the content of zinc in rice was significantly and positively correlated with the total amount of magnesium in soil