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应用典型样方法对不同经营方式和经营持续时间的毛竹林碳氮贮量变化特征进行了研究。结果表明,施肥降低毛竹林系统碳氮贮量,垦复增加毛竹林系统碳氮贮量。两种经营模式毛竹林系统碳氮贮量的分布格局均以土壤层最大,植被层次之。其中,碳贮量土壤层占63.25%~86.32%,植被层占13.17%~35.15%;氮贮量土壤层占94.44%~98.15%,植被层占1.62%~5.12%。施肥、垦复对竹林系统碳氮贮量的影响主要通过对土壤层碳氮贮量的改变来实现。不同经营时间毛竹林土壤碳氮贮量排列顺序不同,施肥毛竹林土壤碳贮量的排列顺序为对照>施肥13 a>施肥5 a,氮贮量的排列顺序为对照>施肥5 a>施肥13 a;垦复毛竹林土壤碳氮贮量的排列顺序为垦复3 a>垦复10 a>对照。经营模式和经营时间梯度上毛竹林土壤碳氮贮量变化的不同步,造成了土壤碳氮比差异较大。其中,施肥毛竹林土壤碳氮比为18~39,垦复土壤碳氮比为13~16,施肥毛竹林碳氮比变化幅度较垦复毛竹林更剧烈,碳氮比的剧烈变化可能对土壤微生物群落和持续立地生产力产生不良影响。施肥和垦复均能够有效提高地上部分的碳氮贮量,但不同经营模式和经营时间的毛竹林碳氮分布格局不同。施肥毛竹林的碳氮比为260,垦复毛竹林的碳氮比为167,毛竹林碳氮分布格局的多样性为毛竹制定专属的培育措施提供了可能。
The characteristics of carbon and nitrogen storage of Phyllostachys heterocycla cv. Pubescens under different management modes and operating durations were studied by using typical sample method. The results showed that fertilization reduced the system of carbon and nitrogen reserves in Phyllostachys pubescens forest and increased the carbon and nitrogen storage of Moso bamboo forest system. Phyllostachys pubescens forest ecosystem distribution pattern of the two management models are the largest soil layer, vegetation level. Among them, carbon storage accounted for 63.25% ~ 86.32% of the soil layer, vegetation layer accounted for 13.17% ~ 35.15%; nitrogen storage soil layer accounted for 94.44% ~ 98.15%, vegetation layer accounted for 1.62% ~ 5.12%. The effects of fertilization and reclamation on carbon and nitrogen storage in bamboo forest are mainly achieved through the change of carbon and nitrogen storage in the soil layer. The order of soil carbon and nitrogen storage of Phyllostachys pubescens forest was different in different management periods. The sequence of carbon storage in the soil of Phyllostachys heterocycla cv. Pubescens forest was control> fertilization for 13 a> fertilization for 5 years, and the order of nitrogen storage was control> fertilization 5 a> fertilization 13 a; The order of soil carbon and nitrogen storage in reclaimed Phyllostachys pubescens was the reclamation 3 a> reclamation 10 a> control. The unsynchronized changes of soil carbon and nitrogen reserves in Phyllostachys heterocycla cv. Pubescens forest under the management mode and operation time gradient resulted in large differences in soil C and N ratios. Among them, the ratio of soil C and N was 18-39 and that of reclaimed soil was 13-16. The change range of C / N ratio was more severe than that of Kemishan bamboo forest. The violent change of C / Microbial communities and on-site productivity adversely affected. Both fertilization and reclamation could effectively increase the carbon and nitrogen reserves of above-ground parts, but the patterns of carbon and nitrogen distribution were different in different management modes and operating hours. The C / N ratio of fertilized bamboo forest was 260 and the C / N ratio of cultivated Phyllostachys pubescens forest was 167. The diversity of C and N distribution in Phyllostachys pubescens forest provided the possibility of establishing exclusive cultivation measures for Phyllostachys pubescens.