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What is a variety? What is the role of improved varieties in modern agricultural production?

发布时间：2025-07-11 03:40:55

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答案：【计分规则】: Varieties are created by human cultivation, economic traits and agricultural biological characteristics meet production and consumption requirements. Under certain cultivation conditions, they can be distinguished from other groups according to specificities such as morphology, cytology, and chemistry. Individuals The main traits among them are relatively consistent, and an appropriate propagation method can maintain its important characteristics of a group of cultivated plants that can be used as means of production.The improved varieties have the following operations in agricultural production:1 . Increase output per unit area2 . Improve product quality3 . Improve resistance to diseases and insect pests, reduce pesticide pollution4 . Enhance adaptability and stress resistance, save energy5 . Extend product supply and utilization time6 . Adapt to intensive management and save labor