戴云山不同类型森林生物量差异特征及其与土壤养分的关系

Relationship between the biomass characteristics and soil nutrients among different forest types in DaiYun Mountain

通过野外森林群落调查和土壤采集室内分析方法,测定了亚热带戴云山山脉中部小戴云海拔1000-1300 m处5种类型森林群落生物量和土壤养分含量,并探讨了两者的相关性。结果表明:罗浮栲阔叶天然林(LF)、甜槠阔叶次生林(TZ)、青冈次生阔叶次生林(QG)、杉木人工林(SM)和马尾松人工林(PM)植被生物量分别为330.69 t/hm2、265.12 t/hm2、252.44 t/hm2、208.98 t/hm2和199.69 t/hm2,LF、TZ、QG的枝、叶、干和细根生物量显著高于SM和PM;LF土壤有机质和土壤总氮含量均显著高于其他四个林分;土壤总磷含量的以TZ最低;水解氮是以QG最高,显著高于其他四个林分;有效磷含量PM和LF最高;微生物碳MBC以LF和SM最高,QG和TZ最低;土壤有机质和土壤总氮含量与植被地上生物量、粗根生物量、细根生物量和总生物量存在显著性正相关关系,土壤氮磷有效性养分和微生物碳与森林植被各器官生物量关系不显著。相比于杉木和马尾松人工林,阔叶次生林具有较高的植被生物量。

The biomass and soil nutrient content among five forest types in range of 1000-1300 m DaiYun Mountain were measured by the forest community investigation and soil collection laboratory analysis, and the correlation between them was discussed. The results showed that the biomass of LF, TZ, QG, SM and PM were 330.69 t/hm2, 265.12 t/hm2, 252.44 t/hm2, 208.98 t/hm2 and 199.69 t/hm2 respectively. The branches, leaves, stems and fine roots biomass of LF, TZ, and QG was significantly higher than that of the SM and PM. The soil total nitrogen and organic matter in LF was significantly highest than that of the other four stands. Soil total phosphorus content was the lowest in TZ. The hydrolysate nitrogen was highest in QG, and significantly higher than the other four trees;the content of available phosphorus was highest in PM and LF. The microbial carbon was the highest in LF and SM. The significant positive correlation between the soil organic matter, soil total nitrogen with the coarse root biomass, fine root biomass and total biomass. There was a significant positive correlation between soil nitrogen and phosphorus availability, microbial biomass carbon and biomass of forest organs and organs. Compared with SM and PM, LF, TZ and QG have higher vegetation biomass.