摘要
利用海南岛吊罗山林区内的生态定位观测站近３ａ的定位观测数据，和定期采样进行的土壤物理性质测定，分析了不同的次生林砍伐程度和利用方式（包括次生林对照、择伐５０％、择伐７０％、皆伐迹地、垦植橡胶和刀耕火种垦植甘蔗、蕃茨等作方）对土壤温度、土壤含水量、土壤团聚结构、土壤机械组成、土壤容重、孔隙度和土壤持水特性等土壤主要物理性质的影响，结果显示，热带次生林的过度砍伐和不合理的刀耕火种，严重地影响了土壤主要的物理性质，导致土壤表层温度升高、温差加大，土壤含水量和持水性能下降，土壤结构受破坏，土壤粘粒流失和向砂砾化发展等等，造成了土壤生态环境的恶化，直接影响了森林的再生和林地的开发和利用，其中尤以皆伐迹地和刀耕火种的影响最为严重。最后提出如仅从土壤物理性着眼，择伐５０％和等高带植橡胶为较合理的热带次生林经营利用方式。
By Using the data from the long term ecological observational station in forest region of Diaoluo Mountains, Hainan island,and by testing physical properties of soil sampled periodically,the effects of different secondary forest felling intensity and utilization ways,including quadrats of secondary forest control,selective felling 50% selective felling70%.clear felling slash, cultivating rubber,slash-and-burn and cultivating sugarcane and sweet potato,etc., on main soil physical properties,such as soil temperature,soil water content,soil aggregate structure,soil mechanical composition,soil volume weight, porosity and water retention property,were analysed Results show that,over-felling of tropical secondary forest and the unreasonable slash-and-burn cultivation seriously influences,the main soil surface temperature and temperature differences,decrease soil water content and water retention ability,destroy soil structure,and lead to soil clay loss,soil sandification and so on,resulting in deterioration of soil ecological environment,directly influencing forest regeneration,forest land exploitation and utilization.Among them,the influences of slash-and-burn cultivation and clear felling slash are most serious.It is suggested that selective felling 50% and strip cropping of rubber would be the reasonable management and utilization ways if soil physical properties are only considered.
出处
《生态学报》
CAS
CSCD
北大核心
1996年第6期652-659,共8页
Acta Ecologica Sinica
基金
国家环保局科技三项费用课题
关键词
森林生态系
热带次生林
土壤物理性质
tropical secondary forest
soil physical property
selective felling
clear felling
slash-and-burn cultivation.
