CAJ | 학술논문

[目的]为了解决新疆地膜污染问题,为可降解地膜的降解机理研究提供可靠的理论依据。[方法]采用室内模拟的方法,研究可降解地膜的降解程度和光照时间的关系,并且经过回归分析拟合出符合其降解规律的降解模型。[结果]试验结果表明：不同类型的可降解地膜的失重率与光照有很大的关系。降解过程未发现杂物,质量却减轻,说明降解产生了气体,证明了紫外线对地膜具有破坏作用。不同的地膜在降解过程中速率有着明显的差异;在相同条件下,诱导期为30d的S4#降解最快,随着紫光光照时间的延长,其降解程度为逐步累积降解的过程。[结论]6种可降解地膜在紫外线照射下失重率和光照天数可以基本上看作是正相关的关系,通过显著性检验后找到数据拟合曲线的降解模型可用逻辑斯蒂模型来进行描述,即Y=a/（1＋b×e-ct）,并且都达到了显著水平（P〈0.01）。
[목적]위료해결신강지막오염문제,위가강해지막적강해궤리연구제공가고적이론의거。[방법]채용실내모의적방법,연구가강해지막적강해정도화광조시간적관계,병차경과회귀분석의합출부합기강해규률적강해모형。[결과]시험결과표명：불동류형적가강해지막적실중솔여광조유흔대적관계。강해과정미발현잡물,질량각감경,설명강해산생료기체,증명료자외선대지막구유파배작용。불동적지막재강해과정중속솔유착명현적차이;재상동조건하,유도기위30d적S4#강해최쾌,수착자광광조시간적연장,기강해정도위축보루적강해적과정。[결론]6충가강해지막재자외선조사하실중솔화광조천수가이기본상간작시정상관적관계,통과현저성검험후조도수거의합곡선적강해모형가용라집사체모형래진행묘술,즉Y=a/（1＋b×e-ct）,병차도체도료현저수평（P〈0.01）。
[Objective] This study aimed to solve the mulch plastic film pollution problems in Xinjiang, in order to provide reliable theoretical basis for the research on the degradation mechanism of biodegradable plastic films. [Method] The effect of illumination intensity on the decomposition of decomposable mulching films was investigated through simulating the field condition in laboratory. Regression analysis was employed to fit the processes of film decompositions. [Result] The weight loss ratios of different types of plastic films were closely related with the illumination. There was no sundry produced during the degradation process, but the weight was reduced, indicating that degradation produced gas, thus, ultraviolet rays had destructive effect on mulch plastic films. Different types of plastic films showed significant differences in the degradation speeds, and under the same conditions, the degradation speed of S4# with the induction period of 30 d was the fastest. With the extension of uv illumination time, the degradation became cumulative degradation process. [Conclusion] Under the uv rays, the weight loss ratio and illumination hours is regarded as a positive correlation relationship. The significant inspection shows that the data fitted degradation model can be described by the logistic model of Y = a/（1＋b×e -ct）, and all the parameters show significant differences （P0.01）.