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应用生态学报 ›› 1996, Vol. 7 ›› Issue (4): 354-358.

• 研究论文 • 上一篇    下一篇

固N树种在混交林中的作用研究Ⅰ.沙棘混交林内根瘤固N与林木生长

何兴元, 张成刚, 杨思河, 张粤, 苏道岩, 刘惠昌   

  1. 中国科学院沈阳应用生态研究所, 沈阳110015
  • 收稿日期:1996-05-16 修回日期:1996-09-05 出版日期:1996-10-25 发布日期:1996-10-25
  • 基金资助:

    中国科学院"八五"重点资助项目

Role of nitrogen-fixing trees in mixed forest Ⅰ. Nitrogen fixation and tree growth of mixed stand with Hippophae rhamnoides

He Xingyuan, Zhang Chenggang, Yang Sihe, Zhang Yue, Su Daoyan, Liu Huichang   

  1. Institute of Applied Ecology, Academia Sinica, Shenyang 110015
  • Received:1996-05-16 Revised:1996-09-05 Online:1996-10-25 Published:1996-10-25

摘要: 研究了沙棘作为下木在混交林中的作用.结果表明,沙棘有明显的供N效应.林冠下生长7a的沙棘,年平均固N量达54kg·hm-2、土壤含N量比杨树或柳树纯林提高20~22%.主林木高生长比纯林提高18~19.4%.

关键词: 固N树种, 混交林, 沙棘, 硝化-反硝化作用, 恢复湿地, 黄河口, 氮输入, N2O

Abstract: The role of Hippophae rhamnoides as the undergrowth in mixed forests was studied. The results show that H. rhamnoide has a significant effect of N supply, and its annual average N fixing amount is 54 kg· hm-2 in 7 years old stand, Comparing with pure Populus sp. And Salix matsuda na stands, nitrogen content in soil of mixed stand is increased by 20~22%, and height increment of main trees by 18~19.4%.

Key words: Nitrogen-fixing tree, Mixed forest, Hippophae rhamnoides, nitrification-denitrification, nitrous oxide (N2O), restoration wetland, exogenous nitrogen, Yellow River estuary.