Abstract:

In order to study the effect of meteorological factors on different fall dormancy alfalfa after regeneration performance influence, using a completely randomized block design of the United States, 11 standard control fall dormancy alfalfa Varieties in autumn cutting regeneration relationship with meteorological factors. The results showed that: In Beijing area each fall dormancy alfalfa cutting in autumn two weeks after regeneration appeared significant differences, different fall dormancy alfalfa plant regeneration of height change and three meteorological factors of residual effect is smaller, descriptions of other factors on alfalfa fall cutting plantlet regeneration of high impact is not significant, it can be accumulated temperature, photoperiod and precipitation on fall dormancy of alfalfa as the main factor of influence. Its effects are accumulated temperature> sunshine time > precipitation. The accumulated temperature and photoperiod on alfalfa fall cutting height has the greatest effect on regeneration after. Effects of accumulated temperature on regeneration to direct effects, there is a significant positive relationship; light hours and precipitation by accumulated temperature on the regeneration of highly positive effects, and its regeneration the direct effects of negative effect.