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在冷凉山区生态环境中，油菜是油料作物的传统作物，但由于越冬死苗问题，致使油菜生产长时期地效益不大。为此，我们对冷凉生态区油菜覆盖间作制进行了试验、观察和调查。目前由于一些地区采用了这一栽培措施，已取得了一定经济效益，值得同类地区推广试用。
Rape is a traditional crop of oil crops in cold and mountainous ecosystems, but rapeseed production is of little benefit over a long period of time because of the problem of overwintering dead seedlings. For this reason, we carried out experiments, observations and investigations on the intercropping system of rapeseed in cool and cool ecological zone. At present, due to the adoption of this cultivation measure in some areas, certain economic benefits have been obtained and it is worth promoting the trial in similar areas.