红锥人工幼林营养特性研究

对不同月份红锥叶片中营养元素含量的变化及其结构进行研究,结果表明,叶片中N、P、K、Ca、Mg、Mn、Fe、Cu、Zn营养元素含量呈季节性变化,普遍地在生长初期（春季）较高,生长旺期（夏季）最低,而秋冬季生长缓慢时由于积累所致而略有回升;叶片中常量元素含量以N、K、P较高,依次排序为：N〉K〉P〉Mg〉Ca,微量元素含量以Mn、Fe为高,依次排序为：Mn〉Fe〉Zn〉Cu,N、P、K、Ca、Mg、Mn、Fe、Zn、Cu比例为：7.40∶1.00∶5.96∶0.30∶0.51∶1.10∶0.16∶0.05∶0.01;根据研究结果及南方山地的土壤特点,红锥人工幼林的施肥时间宜在春季或春夏之交季节,在肥种及配比上,应在施用大量元素N、P、K、Mg、Ca的基础上配施微肥Zn,配比为N∶P∶K∶Ca∶Mg∶Zn=7.40∶1.00∶5.96∶0.30∶0.51∶0.05.

Nutrition Characteristics of Young Hystrix Plantation

The nutritional elements changes and the structure of Hystrix leaves in different months have been studied and the results showed that the nutrient content of N,P,K,Ca,Mg,Mn,Fe,Cu,Zn is in seasonal variation.Generally,they are high in the early growth stage（spring）,lowest in the prosperous growth period（summer）.While slightly rise due to the accumulation in the autumn and winter when the growth is slow.The content of major elements N,K,P are high in the leaf,followed the order of： N K P Mg Ca.With trace element,the content of Mn,Fe is high,followed by the order of： Mn Fe Zn Cu,N,P,K,Ca,Mg,Mn,Fe,Zn,Cu.The ratio of which is： 7.40：1.00：5.96：0.30：0.51：1.10：0.16：0.05：0.01.Based on the findings and the characteristics of the soil in the Southern mountains,the fertilization time of the young Hystrix plantation should be in the spring or between spring and summer.In fertilizer types and proportion,Zn should be applied based on the fertilization of major elements of N,P,K,Mg,Ca.The fertilization ratio is N： P： K： Ca： Mg： Zn = 7.40：1.00：5.96 ： 0.30：0.51：0.05.