dry-and-hot valley

The representative area of dry and hot valley of Jinsha River in Yunnan Province has a temperature condition of the northern tropical zone and a long dry season of more than half a year.

云南金沙江干热河谷典型区具有北热带温度条件和长达半年以上的干季时间，生态系统具有破坏容易恢复难的特点。

The accumulation of free proline in some major tree species growing in dry and hot river valley of Jinsha during both dry and rainy seasons has respectively been determined.

金沙江干热河谷地区的主要造林树种中，以马占相思、山毛豆、真珠相思、大叶相思、台湾相思、绢毛相思、坡柳在旱季游离脯氨酸累积较多；

Drought and water shortage is the main restrictive factor to heighten grain output of dry slope land and the afforestation survival rate in Yuanmou dry hot valley.

干旱缺水是提高干热河谷旱坡地粮食产量和提高植树造林成活率的主要制约因素。