西北林学院学报2012，Vol.27Issue(2)：1-5,5.DOI:10.3969/j.issn.1001-7461.2012.02.01
黄土高原小叶杨与其他树种枯落叶混合分解对养分释放的影响
Influence of Nutrient-release of Mix-leaf Litter Decay of Populus simonii with Other Trees in the Loess Plateau
摘要
Abstract
Soil polarization resulted from continuous growth and planting of pure forest stands is main cause of soil degradation and unbalanced or unsustainable development of artificial forest ecosystem. Fundamental way of controlling soil polarization is to select friendly tree species to form mixed forests. Indoor mixed decomposition experiment was conducted to study the effect of decomposition of mixed leaves of Populus simonii and other species on nutrient release, and to provide theoretical basis for artificial mixed forest formation. The results were as follows. (1). Quercus liaotungensis leaf litter strongly promoted organic carbon release with a promotion percentage of 21. 32%, while Pinus tabulae formi demonstrated suppression effect, and the release rate decreased by 14. 78%. No significant effects on the organic carbon release were observed among the leaves of other tree species. (2) Q. liaotungensis leaf litter strongly increased nitrogen release with a promotion rate of 28. 69%, showing significant promotion effect, for P. sylvestris var. mongolice and Robinia pseudoacacia leaf litters, however, the promotion effects were relatively weaker and nitrogen release rate increased by 14. 98% and 13. 36% respectively. P. Tabulaeformis leaf litter ex-hibited strong inhabiting effect on nitrogen release, the release rate decreased by 20. 33%. For the leaves of other tree species, no significant effects on nitrogen release were observed. (3) R. pseudoacacia, Q. li-aotungensis, and Hippophae rhamnoides leaf litters very strongly promoted the phosphorus release rate with promotion percentages of 57. 60% , 43. 06% , and 38. 60% respectively. Amorpha fruticosa leaf litter strongly promoted phosphorus release, the promotion rate increased by 22. 64%. P. tabulae formis and P. sylvestris var. mongolica leaf litters significantly inhabited phosphorus release, the release rate reduced by 62. 63% and 47. 99%, respectively. The leaf litters of other tree species showed no significant influence on the phosphorus realeass. (4). Potassium(K) released:P. tabulae formis leaf litter showed weak inhabiting effect on potassium release, the release rate reduced by 10. 41%, no significant effects of others were observed.关键词
小叶杨/枯落叶/混合分解/养分释放Key words
Populus simonii/ leaf litter/ mixed decomposition/ nutrient release分类
农业科技引用本文复制引用
祝振华,刘增文,袁娜,杜良贞..黄土高原小叶杨与其他树种枯落叶混合分解对养分释放的影响[J].西北林学院学报,2012,27(2):1-5,5.基金项目
国家自然科学基金(31070630) （31070630）
西北农林科技大学大学生创新实验计划项目(2010). （2010）
