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中国农学通报

中国农学通报 ›› 2014, Vol. 30 ›› Issue (19): 30-35.doi: 10.11924/j.issn.1000-6850.2014-0950

• 林学 园艺 园林 • 上一篇    下一篇

西双版纳不同年龄橡胶林下大叶千斤拔的生物量动态及其模型

王秀华 谢志英 赵永祥 王飞军 刘军伟 唐建维   

  • 收稿日期:2014-04-03 修回日期:2014-05-13 出版日期:2014-07-05 发布日期:2014-07-05
  • 基金资助:
    中国科学院农业项目办公室资助项目“人工橡胶林的合理利用模式及示范”(KSCX2-EW-B-12)；西双版纳州科技局资助项目“西双版纳胶林复合生态系统建设与示范”(200915)；西双版纳州科技局资助项目“不同林龄胶林和茶园中大叶千斤拔的固氮量及其生态效应研究”(YX201102)。

Biomass and Its Estimation Model of Flamingia macrophylla Intercropped with Rubber Plantations with Different Ages in Xishuangbanna

  • Received:2014-04-03 Revised:2014-05-13 Online:2014-07-05 Published:2014-07-05

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摘要： 为掌握种植在不同年龄橡胶林下的大叶千斤拔的生长动态及生物量状况，以种植在3个不同年龄橡胶林下的大叶千斤拔为研究对象，对大叶千斤拔的生长动态进行了定期观测。并根据28株不同大小的大叶千斤拔个体建立大叶千斤拔的生物量回归模型。根据所建立的生物量回归模型，推算3个不同年龄橡胶林下的大叶千斤拔的生物量，并分析其组成和分配特征及其变化趋势。结果表明：不同年龄橡胶林下的大叶千斤拔自种植的第2年均呈现出较快的生长速率及较强的萌生能力，但其生长量和生物量存在显著差异。4年生橡胶林下大叶千斤拔种植2年半后的平均基径(2.89 cm)分别是7年生和16年生橡胶林下大叶千斤拔的1.25、1.86倍；其平均高度(3.3 m)分别是7年生橡胶林下大叶千斤拔的1.05、1.47倍。4年生橡胶林下大叶千斤拔的生物量为28.356 t/hm2，分别是7年生和16年生橡胶林下大叶千斤拔生物量2.55和6.37倍。不同年龄橡胶林下的大叶千斤拔的生物量的器官分配主要以茎为主(50%~60%)，根次之(23%~32%)，果最小(1.79%~12.38%)。随着橡胶年龄的增大，大叶千斤拔的基茎、高度生长和生物量积累呈迅速下降的趋势。

关键词: 孔隙, 孔隙

Abstract: In order to understand growth dynamics and biomass accumulation of Flamingia macrophylla intercropped with rubber plantation of different ages, periodic observation of growth dynamics of Flamingia macrophylla was carried out in 4- year- old, 7- year- old and 16- year- old rubber- Flamingia macrophylla intercropped systems, Furthermore, by using the investigation data of 28 samples of Flamingia macrophylla with different basal diameter and height, the regression model of the biomass relating with BD2H was established and applied to estimate the biomass of Flamingia macrophylla intercropped with rubber plantation of three different ages. The results showed that mean basal diameter and mean height were 2.89 cm and 3.30 m after it was planted in 4-year-old rubber plantation for 2.5 years, which were 1.25 and 1.86 times, and 1.05 and 1.47 times as much as that of mean basal diameter and mean height in 7- year- old and 16- year- old rubber plantations, respectively. The biomass of Flamingia macrophylla was 28.356 t/hm2 after it was planted in 4-year-old rubber plantation for 2.5 years, which was 2.55 and 6.37 times as much as that in in 7-year-old and 16- year- old rubber plantations. Concerning organ allocation of biomass of Flamingia macrophylla, the biomass of stem occupied the greatest proportion (50%-60%) of the total biomass, root biomass was ranked the second (23%- 32% ), leaf biomass was accounted for 11%- 16% , but fruit contributed the smallest (1.79%- 12.38% ) of the total biomass. The results indicated that the growth of basal diameter and height as well as biomass accumulation declined sharply with the rubber plantation age.