山东大白莱以优质、高产、抗病而盛名全国。由于近年来大白莱采种产量低而不稳,影响了大白莱生产。为提高制种产量,增加制种经济效益,笔者借鉴其它作物地膜覆盖经验,进行了该项试验。结果如下: 一、地膜覆盖可以有效地利用太阳能,提高土壤温度,散热慢,保温好。该试验于每天的7 Shandong Bai Lailai to high-quality, high yield, disease-resistant and renowned throughout the country. Due to the low yield and instability of big white rapeseed in recent years, it has affected the production of big ramekin. In order to increase the seed production and increase the economic benefits of seed production, the author draws on the experience of other crops in plastic film mulching and conducted the experiment. The results are as follows: First, the mulching can effectively use solar energy to improve the soil temperature, heat dissipation is slow, good insulation. The test is daily 7