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1 河西走廊发展瓜菜制种的优势 1.1日照充足,热量资源丰富。本区太阳辐射强,日照时数长,是我国年辐射量最大的地区之一,平均太阳辐射量140～158千卡/cm~2年,日照时数为2600～
1 Hexi Corridor development of cucumber seed production advantages 1.1 Sufficient sunshine, rich in calories. The region has strong solar radiation and long hours of sunshine. It is one of the regions with the largest annual radiations in China with an average solar radiation of 140-158 kcal / cm 2 years and a sunshine duration of 2600 ~