摘要
本文对作者《华南坡地利用与改良:重要性与可行性》一文在三个方面作一些补充:1.进一步阐述坡地的重要性,并特别从可能出现的全球性变暖的因果加以说明。2.对前文所提坡地改良与利用方针概括为:“主要采取植物(生物)措施,最大限度地提高以一个坡面或小流域为单位的坡地持续生产力”,并对此作此较系统的论述。3.在前文基础上补充有关科研工作的意见。
The problem under consideration is further discussed under three sections. In the first section, the economic significance of slopelands in South Chins is re-examined in the light of additional information.Special reference is made to the possible reduction of arable laad resulting from the rise of sealevel that may occur as a consequence of global warming.The present productivity of land on the slopes of hills and mountains is very low.Higher productivity will no doubt lead to a decrea.se of CO2 in the atmosphere.As the slopes are mostly well drained, the generation of other 'greenhouse' gases can be easily kept to a minimum.In the second section, the approach as described in the first paper is redefined as the maximization of the over-all sustainable productivity of the land on a slope or in a small watershed.with this working definition in view thefeasibility of the approach is systematically inquired with the existing knowledge attempts are made to provide an answer to the question whether the proposed systems of slopeland utilization and ameliortaion can pave the way to meet the requirements of society today and tomorrow.The last section centres around the strategies of scientific research for the approach.Chinese farmers are farmers well experienced on the plains. On the hill and mountain slopes, their practices stemming from their experiences on the plains generally do more harm than good to the natural resources and environment. Development must be supported by scientific research and strategies of scientific research merit great deliberation. Since the problem transcends across the boundaries of a number of established disciplines, interdisciplinary studies should be stressed.Attention is also called to changes over decades.Some measures may seem promising in a few years, but prove undesirable in the long run .Reasonable accuracy of the data acquired is needed, but pursuits to acquire accuracy higher than necessary should be avoided. The breadth of the contents of research should also be confined to what is essential, but socio-economic studies so often overlooked should be included the majority of cases.For the situation concerned, it is recommended that priorities be given to the following topics. ( 1 )living hedgerows, (2) soil surface cover, ( 3 ) landslides and related phenomena, ( 4 )kenaf as a source of raw material for making paper pulp, ( 5 ) firewoods, ( 6 ) forages, ( 7 )fruits, ( 8 ) plantation for timber, and ( 9 ) regional survey for planning and extension.
出处
《地理研究》
CSSCI
CSCD
北大核心
1989年第4期1-8,共8页
Geographical Research
关键词
坡地利用
土壤侵蚀
植物
slopeland utilization and amelioration, South China
