| 有序样本聚类分析在长序榆苗高生长期划分中的应用 |
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| 引用本文： | 赖文胜.有序样本聚类分析在长序榆苗高生长期划分中的应用[J].福建林业科技,2001,28(1):16-18. |
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| 作者姓名： | 赖文胜 |
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| 作者单位： | 福建省林木种苗总站,福建,福州,350003 |
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| 摘 要： | 以长序榆苗高净生长量为样本 ,采用有序样本聚类分析将长序榆苗高生长过程划分为 4个时期 :出苗期为 4月 13日～ 5月 1日 ,生长初期为 5月 2日～ 8月 1日 ,生长盛期为 8月 2日～ 10月 2 1日 ,生长后期为 10月 2 2日～ 12月 1日。生长盛期时间较短 ,但生长量却占总生长量的 74 19% ,保证生长盛期有充足的水肥条件和延长生长盛期的时间是提高生长量的关键
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| 关 键 词： | 长序榆 生长期划分 有序样本 聚类分析 |
| 文章编号： | 1002-7351(2001)01-0016-03 |
Application of the Sequential Sample Cluster Analysis in the Height Growth Stage Division of Ulmus elongata Seedlings |
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| LAI Wen,sheng.Application of the Sequential Sample Cluster Analysis in the Height Growth Stage Division of Ulmus elongata Seedlings[J].Journal of Fujian Forestry Science and Technology,2001,28(1):16-18. |
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| Authors: | LAI Wen sheng |
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| Abstract: | The height growth process of Ulmus elongata seedlings is divided into four stages with the sequential sample cluster analysis,taking the height net growth increment of U.elongata seedlings as samples:emergence stage(Apr.13～May 1),early growth stage(May2～Aug.1),rapid growth stage(Aug.2～Oct.21) and late growth stage (Oct.22～Dec.1).The rapid growth stage is shorter,but its growth increment accounts for 74.19% of the total growth increment.It is very important for the growth increment enhancement to guarantee enough water and fertilizers at the rapid growth stage and lengthen its time. |
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| Keywords: | Ulmus elongata Growth stage division Sequential sample Cluster analysis |
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