可降解地膜残留碎片对小油菜生长和土壤性状的影响

Effects of Residual Fragments of Degradable Mulch on Small Rape Growth and Soil Properties

采用盆栽试验的方法研究了3种可降解地膜残留碎片对小油菜生长和土壤性状的影响。结果表明:当土壤中可降解地膜残留碎片含量较高时其对小油菜产量和叶片叶绿素含量产生了一定的抑制作用,降低了土壤中碱解氮和有效磷的含量,提高了土壤含水量和速效钾的含量;各地膜处理对小油菜叶片数、土壤p H值和有机质含量无显著影响;可降解地膜与普通地膜相比,其残留碎片对小油菜生长和土壤环境的影响降低。

Pot experiment method was adopted to study the effects of the residual fragments of three kinds of degradable mulch on small rape growth and soil properties by using the ordinary film as the control. The results showed that the high content of residual fragments of degradable mulch in soil had a certain inhibitory effect on the leaf chlorophyll content and yield of small rape, reduced the available nitrogen and effective phosphorus content in soil, and increased the soil moisture and available potassium content. All the mulch residue treatments had no significant influence on small rape leaf number, soil pH-value and soil organic matter content. The residual fragments of degradable mulch had less effect on small rape growth and soil environment than those of the ordinary film.