中文摘要：

在陕西省长武县黄土高原农业生态试验站进行了在相同的上方来水量18L/min条件下3种不同腐殖酸类（NHA、BFA、FA）的黄土坡面侵蚀和养分流失的试验,分析了不同腐殖酸类及不同量的同一腐殖酸对土壤侵蚀和养分流失的影响。结果表明：不同量的NHA处理下,径流量均随时间的增加而增加,NHA浓度150,300g/m2的坡面径流量是500g/m2的坡面径流量的1.14,1.08倍,含沙率和Br-浓度均随时间的增加而减少,累积径流量、累积泥沙量、累积流失量均随用量的增加而减少,150,300g/m2的坡面累积泥沙量是用量500g/m2的2.16,1.87倍,累积Br-流失量是用量500g/m2的1.38,1.23倍,用量500g/m2 NHA对防止土壤侵蚀和养分流失的效果最佳;不同浓度FA处理下,径流量随时间的增加而增加,FA浓度为0.1%,0.03%的累积径流量是浓度0.05%的1.19,1.33倍,含沙率和Br-浓度大体随时间的增加而减少,累积径流量、累积泥沙量、累积流失量均随浓度的增加先减少后增加,浓度为0.1%,0.03%的累积泥沙流失量是浓度0.05%的3.03,4.09倍,累积Br-流失总量是0.05%Br-流失总量的1.1,1.26倍,浓度0.5%FA对防止土壤侵蚀和养分流失的效果最佳;不同浓度BFA处理下,径流量随时间的增加而增加,BFA浓度为0.1%,0.05%的坡面累积径流量是浓度0.03%的1.15,1.1倍,含沙率和Br-浓度随时间的增加而减少,累积径流量、累积泥沙量随浓度的增加而增加,累积流失量随浓度的增加先减少后增加,浓度为0.1%,0.05%累积泥沙量是0.03%累积泥沙总量的1.36,0.49倍,Br-流失总量是0.05%Br-流失总量的4.06,3.5倍,浓度0.5%BFA对防止土壤侵蚀和养分流失的效果最佳;综合考虑3种不同腐殖酸类防止坡面侵蚀和养分流失效果为BFA〉FA〉NHA。

英文摘要：

Under the conditions of three different types humic acid on erosion and nutrient loss on loess slope experiment above the same amount of 18L/min in the Chinese academy of sciences agricultural ecological experimental station of the loess plateau,analyzed the impact of different types humic acid（NHA,FA and BFA）and humic acid in different amount on soil erosion and nutrient loss.Results showed that the different amount of NHA treatment,runoff increased with time.Compared with the slope runoff of 500g/m~2,NHA content of 150g/m~2 and 300g/m~2 was 1.14 times,1.08 times respectively.Sand content and concentration of Br-both decreased with the increase of time,cumulative runoff,sediment accumulation,the cumulative loss all decreased with the increase of dosage,slope cumulative runoff of 150g/m~2,300g/m~2 was 2.16 times,1.87 times as much as 500g/m~2,Br-cumulative loss was 1.38 times,1.23 times as much as 500g/m~2.Dosage of 500g/m~2 NHA to prevent soil erosion and nutrient loss was the best.Under different concentrations of FA,runoff increased with time,the cumulative runoff of concentration of 0.1%,0.03% was 1.19 times,1.33 times of 0.05% concentration,Br-concentration and rate of sand containing substantially reduced with increasing time,cumulative runoff,accumulated sediment and cumulative loss decreased firstly and then increased with increasing concentration,the sediment loss of the concentration of 0.1%,0.03%was 3.03 times,4.09 times as much as 0.05%,cumulative Br-loss was 1.1times,1.26 times to the total loss of 0.05% Br-,and the effect of 0.5% FA concentration on soil erosion and nutrient loss was the best.Under different concentrations of BFA,runoff increased with time,slope cumulative runoff of BFA concentration of 0.1%,0.05% was 1.15 times,1.1times as much as 0.03%,sandy rate and Br-concentration decreased with increasing time.Cumulative runoff,sediment accumulation increased with the increase of the concentration,however,cumulative runoff increased firstly and then decreased with the increase of concentra