| 毛竹林地磷素流失特征研究 |
| 摘要点击 2012 全文点击 1449 投稿时间：2010-07-15 修订日期：2010-09-25 |
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| 中文关键词 毛竹林地 磷素 磷素流失 降雨量 径流 泥沙流失量 |
| 英文关键词 bamboo forest forms of phosphorus phosphorus loss rainfall runoff sediment |
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| 中文摘要 |
| 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 mg/L，生物有效磷（BAP）平均浓度为0.22 mg/L，其中95 % 的TP浓度>0.10 mg/L.与FFP处理相比，整个监测期内SSNM处理可溶性磷（DP）流失总量减少了16.7 %，生物有效磷（BAP）流失总量减少11.0 %.磷素流失量与降雨量、径流量均呈极显著的正相关关系，毛竹林地磷素的流失集中发生在降雨量大的6～8月，各处理中PP流失量与泥沙流失量呈显著的正相关关系，其R2值在0.73～0.88之间. |
| 英文摘要 |
| 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). |
