绿肥毛叶苕子养分积累量及碳释放规律研究

Study on Nutrient Accumulation and Carbon Release Regularity of Green Vicia villosa

以绿肥毛叶苕子为材料,研究不同处理下绿肥养分积累量变化;并采用网袋法模拟研究绿肥腐解率及碳的释放规律。结果表明:毛叶苕子在7-42d之间腐解迅速,腐解率到达60%左右,42-98d内腐解速度逐渐缓慢,到了154d腐解率高达85%左右趋近平缓;毛叶苕子碳释放率与腐解规律相似,均随时间的增加而增加,154d时碳累计释放率由0.7%上升到60%左右,碳储量由38.86g/kg下降到16.69g/kg;毛叶苕子中各养分积累含量存在显著差异,F70+G处理下毛叶苕子中碳、氮、磷、钾含量保持最高。

The changes of nutrient accumulation of green manure under different treatments were studied in green vicia villosa,and net bag method was used to simulate the decomposition rate of green manure and the regularity of carbon release.The results showed that vicia villosa decomposed rapidly between 7 and 42 days,and the decomposition rate reached about 60%,the decomposition rate gradually slowed down within 42-98 days,and reacheed about 85%in 154 days and tended to be flat.The carbon release rate of vicia villosa was similar to decomposition regularity,which increased with time,At 154 days,the cumulative carbon release rate increased from 0.7%to about 60%,and the carbon reserve decreased from 38.86g/kg to 16.69g/kg.There were significant differences in nutrient accumulation in vicia villosa,the content of C,N,P and K in vicia villosa was the highest at F70+G treatment.