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铜是动植物不可缺少的微量元素 微量铜对动植物生长的影响 下图给出了微量铜的供给量对畜禽生长速率和农作物产量影响的示意图。示出了供应不足(贫铜),适量和过量(有毒性)3个区域。在缺铜一侧,严重时症状明显,减产显著,甚至颗粒不收,牲畜死亡,这种情况比较少见。经常发生的是边缘性缺铜,外观不显,似无症状,属于“隐蔽性饥饿”;但此时可造成减产和经济上的损失高达20％,更值得
Copper is an indispensable animal and plant trace elements Trace copper on the growth of animals and plants The following figure shows the supply of trace amounts of copper on the growth rate of livestock and crop yield impact diagram. Three areas of under-supply (copper-depleted), moderate and excess (toxic) are shown. Copper deficiency side, severe symptoms, significant reduction in production, and even the particles do not accept, the death of livestock, this situation is relatively rare. Frequent occurrence of marginal copper deficiency, the appearance is not significant, it seems asymptomatic, are “hidden hunger”; but this time can result in loss of production and economic losses up to 20%, more worthwhile