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营养元素循环的分析结果表明 :尾叶桉 (Eucalyptusurophylla)生长迅速 ,所需N ,P ,K ,Ca和Mg等营养元素的量大 ,而本身的营养元素归还量小 ,土壤中所含有效N ,P ,K ,Ca ,Mg等元素远不能满足尾叶桉生长的需要 ,只有通过施肥才能保证其速生丰产 .
The results of nutrient cycle analysis showed that Eucalyptus urophylla grew rapidly and required large amounts of nutrients such as N, P, K, Ca and Mg, while the return of nutrients was small and the content of available N , P, K, Ca, Mg and other elements far can not meet the needs of the growth of Eucalyptus urophylla, only through fertilization can ensure its fast-growing and high yield.