| Using the observation data of potato growth stage in Xiji County of Ningxia, the average accumulated
temperature of potato in each growth stage of Xiji County was calculated, and the meteorological data were used
to reflect the potato growth process in other main potato producing areas in Ningxia. Based on these growth stages,
the average temperature, precipitation and sunshine suitability of potato key growth stage were calculated using
the formula of the suitability recommended by the World Agri-Food Organization. Taking these suitability as the
independent variables, the annual harvest is the case marker basis, and the cluster analysis method is used to obtain
the threshold value of temperature, precipitation and sunshine meteorological suitability of key growth stage of potato,
and the comprehensive suitability threshold of key growth stage of potato is obtained by using the principle of wooden
barrel. The conclusion is that during sowing-sproutingof main potato producing areas in Ningxia, the comprehensive
suitability of the under-year is 0.44, the comprehensive suitability of the average is 0.53, and the comprehensive
suitability of the harvest is 0.74. During inflorescence formation - flowering, the comprehensive suitability of the
under-year is 0.33. The comprehensive suitability of the average is 0.56, and the comprehensive suitability of the
harvest is 0.86. With the historical data back to the test, the accuracy rate is between 65.6% and 91.6%, which can be applied in the potato growth evaluation business. |
