Abstract:

In order to study accumulation conditions of the dry matter of potatoes in different sowing dates, this paper processed and analyzed the data of the dry matter and meteorological factor in different sowing dates based on the mathematical statistics and crop growth model. The results showed that: the cumulative process of the dry matter of the potato stem presented an S-curve, and had significant correlation with accumulated temperature, accumulated precipitation and sunshine duration except for the meteorological factor. The output grew as the sowing date defers. In particular, the growth in April and May was not as strong as in June. The output of the crop growth model was a little bit higher. In addition, the growth period shortens greatly with a late sowing date while the growth rate slowed down.