梅州地区主要能源草分布及生长情况调查

调查了梅州地区高大能源草五节芒和类芦的分布、生长及生物量等情况,结果表明,这2种草在梅州地区普遍分布,低山地的五节芒地上部干物量达到33.4 t/hm2,类芦干物量达29.0 t/hm2,具有作为能源草开发的价值;此外,五节芒的干物量与土壤水分含量呈显著正相关,但与土壤有机质及速效氮磷钾含量相关关系不显著,而类芦的干物量与土壤水分含量、土壤有机质及速效氮磷钾含量也没有显著相关关系,说明五节芒相对喜水,类芦相对耐旱。指出在山地开发种植芒草类能源草、建立能源农场、生产清洁能源是山区经济发展的新思路。

Investigation of the distribution and growth of major energy grasses in Meizhou city

Investigated the distribution,growth characteristics and biomass of two tall grasses: Miscanthus floridulu(Labnll.)Warb and Neyraudia reynaudiana Keng in Meizhou city,Guangdong province.Results: these two grasses were wide distributed in Meizhou city,with the above ground biomass of M.floridulu reaching as high as 33.4 t/hm2 in low mountainous land,and that of N.reynaudiana reaching as high as 29.0 t/hm2,which was of significant value in energy production;The biomass of M.floridulu had significant positive correlationship with water content in soil,but had no significant correlationships with organic matter,available nitrogen,phosphorus,and potassium in soil;The biomass of N.reynaudian had no significant correlationships with water content in soil as well as with organic matter,available nitrogen,phosphorus,and potassium in soil,indicating that M.floridulu liked more moisture than N.reynaudian and the latter was more drought resistant.The two grasses had huge potential for energy production in the development of the present relatively less developed mountainous regions like Meizhou city.