Abstract:

Based on meteorological data of 108 national meteorological observation stations in Shanxi province from 1981 to 2021, phenological data of 21 sampling points in the typical planting area, and the quality data from 2019 to 2021, the growth periods and arable land area of millet throughout the province were determined by phenological calculation method and inverse distance weighting method. The distribution characteristics of climatic resources during sowing−jointing, jointing−heading and heading−maturity stage of millet were analyzed, and the influence of meteorological conditions on the quality of millet druing different growing stages were discussed. The results showed that: (1) the suitable area for millet of the heat resources were located in the northeastern part of northern planting area, the western part of Lvliang mountain in the central planting area and the southeastern part of Taihang mountain in the southern planting area. The suitable area for precipitation resources was mainly located in the western Lvliang mountain region of the central planting area. The suitable area for sunshine resources was distributed in Taihang mountain, central and southern planting area. (2) The quality of millet in 2019 was better than that of 2020 and 2021, with moisture content reaching high−quality standards across different planting areas. Amylose level was higher in the central and southern planting areas, while crude fat and protein content were higher in the northern planting area. (3) The excessive rainfall before jointing and excessive sunshine hours after jointing were the main reasons for insufficient protein content in millet in Shanxi. Excessive precipitation during the sowing−jointing period, heading−maturity period, and entire growth period were the primary factors leading to an inappropriate amylose content. 

Key words: Suitable climate zones, Quality, Climate resources, Growth period of millet