关键词: 风险评价, 风险评价

Abstract:

In order to be clear about the influence characteristic of the bast fiber mulching film covering crop in greenhouse, the comparison test of the strawberries covered by different films both in greenhouse and open field was carried out. The research results showed that bast fiber mulching films in the greenhouse increased the soil temperature greatly and enhance the water retaining capacity largely, which were better than that on the field. Comparing with covering on the field, blossom and bear fruit in the greenhouse were earlier, the yields increasing were more significant as well. The interaction between different cultivating circumstance and different covering was significant (P<0.01). Bast fiber mulching film in the greenhouse boosted the strawberry yields, and there was 12.8% more than that without covering, and 1.73% more than that covered with PE film. The yields increasing rate of bast fiber mulching film comparing to without covering in the greenhouse was 4.3% more than that on the field.