论文部分内容阅读
一、基本情况基于影响沙打旺结籽的控制因素是温度,我们的种子基地建于温度较高的泾川县泾河两岸的河滩上。海拔900～1030米。基地内的多年平均温度10℃,年平均最高气温16.9℃,7—8月平均气温22.4℃,年平均地面温度12.6℃,年平均日照时数2316.8,大于或等于10℃的年积温在3200℃以上,无霜期190天以上,年平均降雨量549.6毫米。土壤为砂砾土,表层0～20厘米为细砂土,20～50厘米为直径1～8厘米的砾石,
First, the basic situation Based on the control factors affecting the seed of Astragalus is temperature, our seed base was built on the banks of the Jinghe River in Jingchuan County where the temperature is higher. 900 ~ 1030 meters above sea level. The annual average temperature in the base is 10 ℃, the annual average maximum temperature is 16.9 ℃, the average temperature in July-August is 22.4 ℃, the annual average ground temperature is 12.6 ℃, the annual average sunshine hours is 2316.8, the annual accumulated temperature at or above 10 ℃ is 3200 ℃ Above, frost-free period of more than 190 days, the average annual rainfall of 549.6 mm. Soil gravel soil, surface 0 to 20 cm fine sand, 20 to 50 cm diameter of 1 to 8 cm of gravel,