文献类型：期刊文献

中文题名：不同连栽代次桉树人工林的养分循环

英文题名：Nutrient Cycle of Eucalyptus Plantations with Different Continuous-Planting Rotations

作者：余雪标[1] 白先权[1] 徐大平[2] 蔡景光[1]

第一作者：余雪标

机构：[1]中国热带农业科学院橡胶栽培研究所农业部热带作物栽培生理学重点开放实验室;[2]中国林业科学研究院热带林业研究所

年份：1999

卷号：20

期号：3

起止页码：60-66

中文期刊名：热带作物学报

外文期刊名：CHINESE JOURNAL OF TROPICAL CROPS

收录：CSTPCD;;CSCD:【CSCD2011_2012】；

基金：国家自然科学基金!"杉木;桉树人工林长期生产力保持机制的研究"(39630240)

语种：中文

中文关键词：连栽代次;桉树人工林;养分循环;桉树

外文关键词：continuous-planting rotation; Eucalyptus plantation; nutrient cycle

分类号：S792.39;S725.7

摘要：研究结果表明，养分的归还量和吸收量均以１代林最大，其它依次为２代林＞３代林＞４代林。随代次增加，枯落物归还量在总归还量中的比例增加。从总吸收量看，Ｎ、Ｃａ两元素占比例较高，有随代次增加而增加的趋势。随代次增加，５种营养元素总生物循环率增高，代数越高养分的消耗率越低。从养分移出量估计，各代次林分干材部分所占的养分存留量为１／３。“全树利用”及其短轮伐期经营制度是导致林地养分衰竭和生产力下降的主要原因。
The nutrient uptake and return of the Eucalyptus plantations was found highest inthe 1st rotation, followed by the 2nd>the 3rd>the 4th. Nutrient return from litter increasedin the total nutrient return with continuous-planting rotation (CPR). The Ca and N elementswere higher in the nutrients absorbed and tended to increase with CPR. The total biocyclerate of all elements investigated increased with the CPR, and the nutrient consumption decreased with the CPR. It was estimated that the trunks of the trees in the plantations withvarious CPR contained only 1/3 of the total nutrients when calculated with the removal ofthe nutrients. It is believed that all tree utilization and short rotation system were main factors responsible for nutrient depletion and productivity decline of the stand sites.