Regulating effects of different mulching materials on soil nutrient and temperature in immature rubber plantation

In order to screen optimum cover material in immature rubber plantation，different mulching material treatments of pot experiment were carried out，which included 3 cm biological material，2 cm biological material，1 cm biological material，plastic film mulch，straw mulch. A flat plot without mulch was used as a control. The results showed that the nitrate nitrogen contents on 3 cm biological material mulch and 1 cm biological material mulch were significantly higher than that of four others，the contents of rapid available phosphorus and total phosphorus on plastic film mulch were significantly higher than those of five others，rapid available potassium content on straw mulch was significantly higher than those of five others，the contents of ammonium nitrogen，total nitrogen and total potassium were not significantly different on 3 cm biological material，2 cm biological material，1 cm biological material，plastic film mulch，straw mulch. In plastic film mulch and bare land ground，temperature was not significantly different， in 3 cm biological material，2 cm biological material，1 cm biological material，straw mulch，temperature was significantly lower than that in bare land.