生物降解地膜应用于果蔗效果初探

Study on the Effect of Biodegradable Films in Chewing Cane

为了探明生物降解地膜在果蔗上的应用效果,以生物降解地膜和普通PE膜为试验材料,通过在广州市南沙区的大田试验,研究了不同种类地膜对果蔗生长期农艺性状和收获期产量的影响,同时重点调查了不同时期生物降解地膜的降解情况以及种植时的机械覆膜效果。结果表明:3个处理间各生长阶段的农艺性状差异不大,以处理A效果最优;2种生物降解地膜较普通PE膜处理分别增产13.47%和13.05%,增产效果明显;生物降解地膜的初始力学性能满足果蔗的机械覆膜要求,覆膜后248天,处理A已完全降解,处理B的降解失重率也达到57.41%。生物降解地膜不仅可以较好地满足果蔗的使用要求,而且能够从源头上解决蔗田面源污染问题,是一种符合现代农业发展需求的绿色、环保型产品。

In order to evaluate the application of biodegradable mulch,biodegradable and PE films were used to study their effects on agronomic traits and crop yield of chewing cane in Nansha,Guangzhou.We also investigated the degradation of biodegradable films at different growth stages and the effect of mulching by machine before planting.The results showed that there were few difference in agronomic traits among the three treatments at each growth stages,with treatment A having the best effect.The other two biodegradable film treatments increased production by 13.47%and 13.05%respectively,as compared to PE film treatment.The initial mechanical properties of the biodegradable films met the requirements of machine mulching.After 248 days of mulching,films from treatment A was completely degraded,and the weight loss rate of films from treatment B also reached 57.41%.Biodegradable mulch not only improves the growth and yield of chewing cane,but also solves the problem of non-point source pollution caused by PE film mulch in sugarcane fields from the source.Thus,it is an environmentally friendly product that fits the modern agricultural development.