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【目的】通过在三个不同气候地区的试验,研究气候因素对农用氧化型降解地膜降解的影响,为此类降解地膜在不同地区的应用而调整添加剂配方提供指导。【方法】太阳辐射、温度和湿度是控制降解速度的主要因素,通过红外光谱分析,力学性能和分子量测试来评估他们对降解的影响。【结果】太阳辐射强度对氧化型降解地膜的降解影响最大。经过6个月太阳照射后,含有高浓度添加剂的降解膜,降解速率快。【结论】氧化型农用降解地膜的降解速率主要受太阳辐射强度控制,温度和湿度对降解速率影响较轻。当分子量小于5道尔顿时,降解膜碎片能够被微生物消化。
【Objective】 The effects of climatic factors on degradative degradation of agroforestry in agriculture were studied through experiments in three different climatic regions, providing guidance for adjusting the formulation of such degradable film in different regions. 【Method】 Solar radiation, temperature and humidity were the main factors controlling the degradation rate. Their effects on degradation were evaluated by FTIR, mechanical properties and molecular weight. 【Result】 The results showed that solar radiation intensity had the greatest effect on the degradation of oxidative degradable mulching film. After six months of solar irradiation, the degradation membrane containing high concentrations of additives, degradation rate. 【Conclusion】 The degradation rate of oxidized agro-degradable mulching film is mainly controlled by the solar radiation intensity, and the temperature and humidity have less effect on the degradation rate. Degraded membrane fragments can be digested by microorganisms when the molecular weight is less than 5 Daltons.