【摘要】 为验证生物可降解地膜在皖北甘薯生产上的适用性,开展了由不同生产原料制备、降解路径不完全相同的几种生物可降解地膜在甘薯上的应用效果试验,测定了覆膜后土壤温、湿度及膜内外温度差异、可降解地膜覆盖甘薯在前后期的拉伸强度变化、对甘薯产量及质量的影响。结果表明:不同生物可降解地膜能够达到与对照常规地膜相同的增温、保墒、抑制杂草的农艺效果;各生物可降解地膜处理均较对照常规地膜增产22%以上,在薯块膨大期遇连阴雨等较极端天气条件下,能够显著避免因未能及时揭膜所造成的幼嫩薯块腐烂;供试生物可降解地膜能够有效适期降解,不影响下茬农事操作。更多还原

【Abstract】 In order to verify the applicability of biodegradable plastic film in sweet potato production in northern Anhui, test on application effects of several biodegradable plastic films prepared from different production raw materials with different degradation paths on sweet potatoes was carried out. The soil temperature and humidity, the difference of temperature between inside and outside the film, the change of tensile strength of degradable plastic film during earlier and later stage of covering sweet potato, and the impact on yield and product quality of sweet potato were measured. The results showed that the biodegradable plastic film treatment could achieve the same agronomic effects of increasing temperature, preserving moisture and inhibiting weed as the control(conventional plastic film treatment). Compared with the control, the yield of each biodegradable plastic film treatments increased by more than 22%. Under extreme weather condition, such as continuous rain during potato expansion, it could significantly avoid the decay of young potato blocks caused by failure to peel the film in time. The tested biodegradable plastic film could be effectively degraded in an appropriate period without affecting the farming operation of the next crop.更多还原