secondary decomposition

The primary and secondary factors influencing the decomposition of litter were founded as collembola, nematode, inorganic P transformation and moisture.

通过灰色关联分析表明，影响土壤枯枝落叶分解速率的主要因素是弹尾类动物、线虫类动物、无机磷转化作用和土壤含水量。

The results show that the yield of xylan pyrolysis tar product increases with rising reacting temperature, but decreases with rising temperature after approaching a maximum value caused by the secondary decomposition of tar.

试验结果表明，木聚糖热解生成的焦油产率随温度升高而增加，达到最大值后随着温度的继续升高，焦油发生二次裂解使产率降低；

Three indicators are secondary indicators of decomposition and refinement, a total of 34 indicators.

三级指标是二级指标的分解和细化，一共34项指标。

The tar yield increased with increase of temperature and maximized at about 27% of lignin at 550 ℃. Beyond this temperature tar yield decreased while more uncondensable gas was produced due to secondary decomposition.

焦油产量随温度升高而增大，在550℃出现质量分数为27%的最大产量，温度进一步升高，部分挥发分的二次裂解使焦油产量降低而轻质气体产量大大增加；