桉树+粗果相思混交林模式及其效益

来源 :海南大学学报(自然科学版) | 被引量 : 0次 | 上传用户:chen17981
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在各种混交模式中,桉树高生长以行间混交模式高于带状混交和纯林模式;胸径生长因受到密度效应作用,行间与带状混交模式均低于纯林模式;单株材积以纯林最高,行间混交次之,带状混交模式最小;林木树冠长度以混交模式大于纯林模式.各模式中粗果相思的生长,以雷林33 号行间混交模式的单株材积最大,达到0-102 1 m3 ,粗果相思的群体蓄积为带状混交< 雷林33 号行间混交< MLA(尾叶桉无性系) 行间混交;从粗果相思的群体保存率看,MLA行间混交模式最高(90-4% ) ,远大于雷林33 号(47-1 % ) 行间混交和MLA的(43-9% ) 带状混交模式;从群体总产量来看,MLA行间混交模式最高,其它模式依次为MLA 纯林> 雷林33 号行间混交模式> MLA带状混交模式> W5 纯林模式> 雷林1 号桉与大叶相思混交模式;从生物量测定结果看,纯林MLA 单株生物量高于混交模式;群体生物量则以行间混交模式最高,达到71 414-1 kg/hm2 ,MLA带状混交与纯林模式分别为36 501-4 kg/hm2 和63 434-3 kg/hm2 ;各模式枯落物现存量以带状模式最高(9 794.0 kg/hm2) ,MLA行间混交模式次之(9 262.0 k In all kinds of mixed mode, the height growth of eucalyptus was higher than that of banded mixed and pure stands in mixed mode of intercropping. The growth of DBH was affected by the density effect, and the mixed mode of interplanting and banded mixed was lower than that of pure stands. The highest pure forest, followed by mixed rows between the banded mixed mode is the smallest; canopy length to mixed mode is greater than the pure forest model. In each mode, the growth of Acacia crassicarpa had the largest single plant volume in mixed mode of Leilin 33, reaching 0-102 1 m3. The population of Acacia crassicarpa accumulated into banded mixed < MLA (Eucalyptus urophylla) lines. The population retention rate of MLA lines was the highest (90-4%), which was much larger than that of Leilin33 (47-1%) lines And MLA (43-9%). The total mixed production of MLA was the highest among the rows, while the others were MLA pure forest> Leilin 33 mixed row> MLA banded mixed mode > W5 pure forest model> Eucalyptus and Eucalyptus urophylla 1 hybrid model; from biomass measurement results, pure forest MLA per plant biomass was higher than the mixed mode; group biomass was intercultural mixed mode highest, reaching 71 414-1 kg / hm2, MLA mixed belt and pure forest models were 36 501-4 kg / hm2 and 63 34-3 kg / hm2; each mode existing litter in an amount up mode strip (9 794.0 kg / hm2), followed by inter-MLA line Mixed mode (9 262.0 k
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