欢迎访问《生态学杂志》官方网站,今天是 分享到:

生态学杂志 ›› 2005, Vol. ›› Issue (10): 1147-1150.

• 研究报告 • 上一篇    下一篇

川中人工纯柏林凋落物分解动态研究

田茂洁   

  1. 西华师范大学生命科学学院, 南充, 637002
  • 收稿日期:2005-01-10 修回日期:2005-03-23 出版日期:2005-10-10
  • 基金资助:
    西华师范大学青年科技基金资助项目

Decomposition and nutrient release of pure Cupressus forest litter in Sichuan Basin

TIAN Maojie   

  1. College of Life Science, West China Normal University, Nanchong 637002, China
  • Received:2005-01-10 Revised:2005-03-23 Online:2005-10-10

摘要: 对柏木人工纯林的凋落物有机碳和一些营养元素的分解和释放过程的研究表明,柏木凋落物中有机碳和营养元素的矿化非常缓慢,凋落物有机碳的半减期是33周,氮素矿化半减期是433周,磷矿化半减期是10周,钾矿化半减期是24周,钙矿化半减期是86周,镁矿化半减期是12周。柏木早期生长缓慢、成林困难主要是受氮素不足的制约。在林分改造和营林中适当增加阔叶速生树种,改善凋落物性质,对促进凋落物分解和养分周转、改善土壤养分状况、提高柏木人工林的生态和经济效益是很必要的。

关键词: 黄土高原北部, 紫花苜蓿, 人工草地, 群落演替, 植物多样性, 森林草原带

Abstract: The study resucts showed that the mineralization of organic carbon and other nutrients in Cupressus litter in Sichuan Basin was very slow,with a half live of 33 weeks for organic carbon,433 weeks for nitrogen,10 weeks for phosphorus,24 weeks for potassium,86 weeks for calcium,and 12 weeks for magnesium.The nitrogen shortage induced by slow mineralization of the litter could be the main factor restricting the early growth of Cupressus.It is necessary to introduce some fast-growth broadleaf woody species in managing pure artificial Cupressus forest to improve litter property,to speed up nutrient release,turnover and cycling,and to enhance economic benefits.

Key words: North Loess Plateau, Alfalfa (Medicago sativa), Artificial grassland, Community succession, Plant diversity, Forest-steppe ecotone

中图分类号: