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我国西北干旱地区的农业气候资源,人们进行过许多研究。我国西南干旱河谷地区的农业气候资源,当地及有关部门还研究不多。本文在概述干旱河谷气候特征的基础上,探讨了农业气候资源的分类与合理利用。 一、西南干旱河谷气候特征 我国西北深居内陆,海洋季风难以到达,降水稀少,蒸发旺盛,广大地区均属干旱区域,河谷也不例外。我国东南面向海洋,山脉、河流大致呈东西走向,有利于东南季风的深入,河谷不0仅是汇水的地方,而且热量条件也特别优越。我国西南的干旱河谷则不同,名山大川形成高山
Many studies have been conducted on agricultural climate resources in arid areas of northwestern China. The agricultural climate resources in the arid valley of southwest China have not been much studied by local and relevant departments. On the basis of summarizing the climatic characteristics of the arid valley, this paper discusses the classification and rational utilization of agricultural climatic resources. First, the climate characteristics of the southwestern arid valley Northwest China’s deep inland, marine monsoon difficult to reach, precipitation is scarce, strong evaporation, the vast area is arid areas, the valley is no exception. Southeast of our country facing the ocean, mountains, rivers roughly east-west direction, is conducive to the southeast monsoon in depth, the valley is not only where the catchment, and the heat conditions are particularly superior. Southwest China’s dry valley is different, the formation of mountains mountains