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为探索玉米高产群体的小气候特征，通过对不同生态条件下玉米主要生育阶段田间小气候的观测分析表明，毕节高海拔地区播种密度在３３３３～４４４４株／（６６７ｍ２），玉米生长发育关键时期（大喇叭口－抽雄吐丝）的田间小气候随密度增加更为适合玉米生长发育及产量形成，特别是４４４４株／（６６７ｍ２）这一密度群体结构最为合理，株间温度为２２～２３℃，相对湿度为８５％左右，对太阳辐射能吸收能力强，反射损失少，气候资源的利用率较高，玉米实产５２２．２３ｋｇ／（６６７ｍ２），马铃薯、玉米套作复合产量达６７６．５８ｋｇ／（６６７ｍ２），相对于其它密度能获得较佳的生态环境和经济效益。
In order to explore the microclimate characteristics of high-yielding maize population, the observation and analysis of the field microclimate in the main growth stages of maize under different ecological conditions showed that the sowing densities of 3333 ~ 4444 plants / (667m2) in high altitude area of Bijie and the key period of maize growth The population microclimate in the field of Pinus tabulaeformis was more suitable for the growth and yield formation of maize with increasing density. Especially, the population density of 4444 plants / (667m2) was the most reasonable, the temperature between strains was 22-23 ℃ and the relative humidity was 85%, strong absorptivity to solar radiation, less reflection loss and higher utilization of climatic resources. The yield of corn is 522.23kg / (667m2), and that of potato and corn is 676.58kg / (667m2) , Relative to other densities can get a better ecological environment and economic benefits.