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植物必需大中量元素
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植物必需大中量元素
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植物必需大中量元素
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major and medium essential elements of plants
植物必需大中量元素
植物正常生长发育所必不可少的大量及中量营养元素。大量元素指平均含量占植物干物重0.5%以上的必需元素,中量元素指平均含量占植物干物重0.1%~0.5%的必需元素。按照国际植物营养学会的规定,植物必需元素在生理上应具备三个特征:对植物生长或生理代谢有直接作用;缺乏时植物不能正常生长发育;其生理功能不可被其他元素代替。
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