Characteristics of Runoff-related Total Nitrogen and Phosphorus Losses Under Long-term Fertilization and Cultivation on Purple Soil Sloping Croplands

被引：0
作者：
Wu X.-Y. [1 ]
Li T.-Y. [1 ]
He B.-H. [1 ]
机构：
[1] Key Laboratory of Eco-environment in the Three Gorges Reservoir Region, Ministry of Education, College of Resources and Environment, Southwest University, Chongqing
来源：
He, Bing-Hui (hebinghui@swu.edu.cn) | 1600年 / Science Press卷 / 42期
关键词：
Cultivation; Fertilization; Nitrogen and phosphorus loss; Purple soil; Surface runoff;
D O I：
10.13227/j.hjkx.202009221
中图分类号：
学科分类号：
摘要：
To elucidate the effects of long-term fertilization and cultivation on runoff rates and runoff-related nitrogen (N) and phosphorus (P) losses, the following five treatments were established on sloping purple soil cropland: ① no fertilizer with downslope tillage (CK), ② combined application of manure and fertilizer with downslope tillage (T1), ③ chemical fertilizers with downslope tillage (T2), ④ chemical fertilizer with increasing fertilization with downslope tillage (T3), and ⑤ chemical fertilizer with contour tillage (T4). The runoff rate, runoff-related total N (TN), and total P (TP) concentrations and their loss rates from 104 erosive rainfall events were determined for the period 2008-2019. Results showed that although runoff rates were not significantly different among the fertilization treatments (P>0.05), runoff was markedly lower in fertilization treatments than in the CK treatment (P<0.05). Runoff-related TN concentrations were significantly higher in the CK compared to the fertilization treatments (P<0.05), while there were no significant differences among the T2, T3, and T4 treatments, which had higher concentrations than the T1 treatment. Runoff-related TP concentrations were significantly higher from the T1, T2, and T3 treatments than the CK treatment (P<0.05), and were significantly lower in the T4 than the CK treatment (P<0.05). TN loss rates were not significantly different among the fertilization treatments (P>0.05), but were all lower than the CK treatment (P<0.05). Furthermore, TP loss rates were not significantly different among the downslope treatments (P>0.05), but were all higher than the contour treatment (P<0.05). Runoff rates showed no significant relationships with TN and TP concentrations in the CK, T1, and T2 treatments but were significantly negatively linearly correlated in T3 (P<0.05) and significantly positively linearly correlated in T4 (P<0.05). These results potentially provide scientific guidance for the prevention and control of agricultural non-point source pollution on sloping croplands in the purple soil area. © 2021, Science Press. All right reserved.
引用
收藏
页码：2810 / 2816
页数：6
相关论文
共 30 条
  • [11] (1991)
  • [12] Yan J M, He B H, Tian T Q, Et al., Effect of fertilizer levels and tillage methods on phosphorus loss in purple soil area, Journal of Soil and Water Conservation, 29, 1, pp. 132-136, (2015)
  • [13] Lin C W, Luo C Y, Pang L Y, Et al., Effects of different cultivation and mulching methods on soil erosion and nutrient losses from a purple soil of sloping land, Acta Ecologica Sinica, 30, 22, pp. 6091-6101, (2010)
  • [14] Luo D H, Wang Z F, Long Y, Et al., Effect of optimized fertilization and biochar application on phosphorus loss in purple soil sloping farmland, Environmental Science, 41, 3, pp. 1286-1295, (2020)
  • [15] Long T Y, Liu X Z, Liu J., Modeling spatial and temporal variation of nitrate loss via interflow in a sloping field of purple soil, Journal of Agro-Environment Science, 34, 10, pp. 1973-1978, (2015)
  • [16] Du Y N, Li T Y, He B H, Et al., Stoichiometric characteristics of purple sloping cropland under long-term fertilization and cultivation, Environmental Science, 41, 1, pp. 394-402, (2020)
  • [17] Peng S L, He B H, Wang R Z, Et al., Effect of soil fertility quality based on different fertilization and tillage patterns in slope cropland of purple soil under natural rainfall, Journal of Agricultural Resources and Environment, 35, 4, pp. 318-326, (2018)
  • [18] Xie J Y, Cao H B, Meng H S, Et al., Effects of different fertilization regimes and fertilization ages on size distribution and stability of soil aggregates, Journal of Soil and Water Conservation, 34, 3, pp. 274-281, (2020)
  • [19] Fan Y L, Liu X Z, Gao L, Et al., Effects of fertility-building practices on soil organic carbon loss with sediment in sloping cropland of red soil, Acta Pedologica Sinica, 56, 3, pp. 638-649, (2019)
  • [20] Yang F, Cheng J H, Zhang H J, Et al., Effect of herb plants on soil detachment and erosion dynamics, Transactions of the Chinese Society for Agricultural Machinery, 47, 5, pp. 129-137, (2016)
123