A 1985 study published on the mainland found that the chief reasons why Hainan is far inferior for growing rubber to places like Malaysia and Indonesia is its lower temperatures and stronger winds combined with the threat of drought.
大陸「科學出版社」一九八五年出版的「海南島熱帶農業自然資源與區劃」一文，提到海南島橡膠產量遠遜於馬來西亞與印尼等地，主要就是低溫、風力，加上乾旱的威脅。