论文部分内容阅读
１９８４年以来，对国内外２９种不同型号可控制降解时间的光降解地膜，进行了棉花田间效应的研究，认为光解膜在自然曝晒下一定时间范围内能够自行降解，与普通地膜相比具有相同的土壤环境效应和相近的增产效果。在降解末期土壤表层有机质测值明显提高，土壤容重有减轻趋势。但对土壤的矿质元素含量无明显影响，也未发现有害物质产生。在棉田应用时，诱导期控制在６０天左右，降解过程在１２０天以内，有较好的实用价值。
Since 1984, 29 different types of photodegradable mulching film with controlled degradation time at home and abroad were studied, and the field effect of cotton was studied. The photolysis film was able to self-degrade in a certain period of time under natural exposure. Compared with ordinary mulching film, The same soil environmental effects and similar stimulation effect. At the end of degradation, the measured values of soil surface organic matter obviously increased, and the soil bulk density tended to reduce. However, the content of mineral elements of the soil had no significant effect, but also found no harmful substances. In the application of cotton, the induction period control in about 60 days, the degradation process within 120 days, have good practical value.