%0 Journal Article
%T A Study on Potential Productivity of Natural Rubber in Hainan Province Based on a Net Primary Production Model<br>基于净初级生产力的海南天然橡胶产胶潜力研究
%A LI Hailiang
%A LUO Wei
%A LI Shichi
%A LIU Haiqing
%A <br>李海亮
%A 罗微
%A 李世池
%A 刘海清
%J 资源科学
%D 2012
%I 
%X The contradictions between the supply and requirement of natural rubber are currently becoming increasingly acute. Hainan Province has become the largest producer of natural rubber. Yangjiang Farm, one of the largest farms in the Hainan State Farms, is located in north-central Hainan Island. The land area and natural rubber plant area of the farm are 14 367 hm2 and 5 190 hm2, respectively, with the harvested area being 4934 hm2. Yangjiang Farm was chosen for this study of the pilot area with an annual output of natural rubber about 4500 t. Based on the Carnegie Ames Stanford Approach (CASA), a net primary productivity model for natural rubber using Moderate Resolution Imaging Spectroradiometer (MODIS) data was developed. This model accounts for effects of temperature and differences in surface water vapor pressure. On the basis of this, the NPP of natural rubber in Yangjiang Farm was calculated using MODIS data of 250 m×250 m spatial resolution in combination with weather station-based meteorological variables from April through December in 2009. Then, the potential productivity of natural rubber in Yangjiang Farm was calculated through the NPP and distribution of dry matter. In general, for the entire farm, the spatial distribution of the potential productivity of natural rubber was affected primarily by hydrothermal conditions and rubber strain, showing marked geographical differences. Meanwhile, seasonal changes in the potential productivity of natural rubber corresponded to the biological characteristics and changes in phenology of natural rubber. Compared the estimates with the final yield by methods of time series and spatial series, a conclusion was drawn that there was an evident linear relation between them. Results show that the two models appear to be essentially feasible. The potential productivity of natural rubber in Yangjiang Farm was 5573 t in 2009, 22% higher than the final yield of 4572 t. This suggests that there is large potential for further increasing the rubber production in Yangjiang Farm. This study would be of importance to increase the production of natural rubber and income of rubber farmers and to protect the environment.
%K Net primary production (NPP)
%K Natural rubber
%K Potential productivity of natural rubber
%K Hainan Island<br>净初级生产力(NPP)
%K 天然橡胶
%K 产胶潜力
%K 海南岛
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=9DEEAF23637E6E9539AD99BE6ABAB2B3&aid=A0AB0B0D8BB6BF944143B086ACE785E5&yid=99E9153A83D4CB11&vid=339D79302DF62549&iid=0B39A22176CE99FB&sid=5FF9F4F7CB1800C7&eid=A04F01817ECB9A48&journal_id=1007-7588&journal_name=资源科学&referenced_num=0&reference_num=15