毛竹林地磷素流失特征研究

通过在四岭水库流域代表性毛竹林地设置定位径流小区,研究不同施肥条件下毛竹林地磷素流失状况.该定位试验设有对照(CK,不施肥),农民常规高产栽培(FFP)与适地养分科学管理(SSNM)3个处理.结果表明,在2009年6月～2010年2月这9个月的监测期内,各次自然降雨条件下毛竹林地表径流中总磷(TP)平均浓度为0.59 ...

Research on Characteristics of Phosphorus Loss in Bamboo (Phylostachys pubescens) Forest

The effect of different fertilization treatments on phosphorus loss under field conditions was investigated through setting runoff plots in bamboo (Phylostachys pubescens) forests. The results showed that, the average total phosphorus (TP) concentration of the runoff was 0.59 mg/L,and the average bioavailable phosphorus (BAP) concentration was 0.22 mg/L during the study period. The total phosphorus (TP) concentration of the 95% observed runoff samples exceeded 0.10 mg/L. Compared with FFP, the SSNM treatment reduced total dissolved phosphorus (DP) loss by 16.7 %, reduced total bioavailable phosphorus (BAP) loss by 11.0 %. Phosphorus was highly correlated with both rainfall and runoff. The largest phosphorus losses occurred in June, July and August, which had the largest rainfall. Significant correlations also existed between particulate phosphorus (PP) and sediment (R² 0.73-0.88).