在我国目前生产水平下，一般认为小麦亩产200公斤以下为低产，亩产200～4O0公斤为中产，亩产400～600公斤为高产，亩产600公斤以上为超高产。由低产变中产相对比较容易，而中产变高产或超高产则比较困难。我国各地小麦生产条件各不相同，经过40多年的生产实践和试验研究，形成 Under the current production level in our country, it is generally considered that the yield of wheat below 200 kg per mu is low, and that of 200 to 400 kg of mu is middle yield with a yield of 400-600 kg per mu and a yield of 600 kg or more per mu. It is relatively easy to shift from low-yielding to middle-yielding, while it is more difficult for middle-yielding to become high-yielding or high-yielding. The conditions of wheat production in different parts of China are different. After more than 40 years of production practice and experimental research,