关键词: 藜麦, 藜麦, 海拔, 营养成分, 差异性, α-亚麻酸

Abstract: The paper aims to improve the forecast of the first spring soaking rain in Heilongjiang, and to prevent and mitigate disasters for agricultural production. Based on the daily precipitation data of 62 stations in Heilongjiang and NCEP/NCAR reanalysis data, we conducted the study by adopting the climate trend, EOF, correlation and synthesis methods. The results showed that: the spring soaking rain in Heilongjiang showed a significant advance trend, it started in the east and eventually reached the west on average; the earliest in history was April 1, and it did not appear at more than 20 stations during April-May for 12 years; it could be divided into 3 types: consistency, east- west inverse, central- east&west inverse; there was a significantly inverse correlation with precipitation in spring, especially in April; in early years, in the early autumn and winter, the 500 hPa circulation anomaly field in the northern hemisphere was in the order of“-+”from high latitude to mid-latitude, and on the other hand was“+-”; in April, the 500 hPa circulation correlation field was positively correlated from Lake Baikal to the western part of Heilongjiang, while it was negatively correlated in the subtropical region. The analysis shows that grasping the climatic background and variation characteristics and using the variations of 500 hPa circulation field in the northern hemisphere in early autumn, winter and April could have a good guiding significance for the forcast of the first spring soaking rain.