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长期以来,人们习惯于用农作物品种生育期的长短作为划分品种熟期类型的主要依据。这对指导早熟性育种、品种的推广和利用起到了积极的作用,但是品种的生育期往往受气温、降水、土壤、肥料、栽培技术条件等因素的制约,种植在不同地区或不同条件(自然的和人为的)下,品种生育期的长短又有较大的波动。所以,以生育天数为根据而划分的熟期类型,还难以反映品种完成全部生长发育过程的内在特性。笔者在互助
For a long time, people are accustomed to using the length of the growing period of the crop varieties as the main basis for the classification of mature varieties. This has played an active role in guiding premature breeding and the promotion and utilization of varieties. However, the growth period of varieties is often restricted by factors such as temperature, precipitation, soil, fertilizers and cultivation techniques, and is planted in different regions or under different conditions And man-made), the length of the breeding period of the variety has a greater volatility. Therefore, the maturity type, which is based on the number of days of birth, can hardly reflect the inherent characteristics of the varieties to complete the whole growth and development process. I help each other