尿素作为补充氮源对西番莲果渣高温堆肥进程的影响

利用西番莲废果渣为基本原料进行堆肥试验,研究了添加尿素及2种微生物菌剂（榕风与福贝）在西番莲果渣堆肥过程中温度、C/N比、总氮（T-N）、水溶性NH4＋-N和水溶性NO3--N的动态变化规律。结果表明,加入一定比例的尿素能够增加高温堆肥中〉50℃的高温持续时间、减少最后达到环境温度所需时间;加快堆肥NH4＋-N的下降,促进堆肥化腐熟后期NO3--N的累积,增加腐熟后全氮的含量,加快堆肥化进程。在添加尿素的基础上,添加微生物菌剂,显著加快果渣堆肥中C/N比的下降速度,促进堆肥腐熟进程的作用效果更明显,但两种微生物菌剂之间对堆肥化的促进作用效果无显著差异。

Effects of Adding Urea Supplementary Nitrogen on High-Temperature Composting Process of Passion Fruit Marc

The composting with passion fruit marc as raw material with adding urea and microbial agents Rongfeng and Faby was carried out to study the effects of adding urea as the supplementary nitrogen on composting process.The dynamic changes of temperature,C/N ratio,T-N,water-soluble NH4＋-N and water-soluble NO3--N contents during the composting were discussed.The results showed that adding urea could enhance the duration time of high temperature（50 ℃）,reduce the time of reaching environmental temperature;decline the content of NH4＋-N rapidly and enhance the content of total nitrogen（T-N）and water-soluble NO3--N.Inoculating microbial agents Faby and Rongfeng under adding urea,the C/N ratio of composting decreased significantly,the accelerating effect on composting was significant,but no signifi-cant difference was found between Faby and Rongfeng.