College of Forestry, Beijing Forestry University, Beijing, 100083, China.
Environ Sci Pollut Res Int. 2020 Jul;27(20):24831-24847. doi: 10.1007/s11356-020-08988-7. Epub 2020 May 3.
Eutrophication has been a critical environmental issue due to soil nitrogen (N) and phosphorus (P) loss in runoff from agricultural lands. Plant hedgerow is an important measure to prevent soil erosion and reduce agricultural non-point source pollution (NPSP). In the present study, we searched 3683 research papers on plant hedgerows published from 1980 to March 2020. After screening, we used 53 effective papers on plant hedgerows for the meta-analysis by using Stata 15.1. The results showed that plant hedgerows significantly increased soil organic matter (SOM) (standardized mean difference (SMD) = 1.46; 95% confidence interval (CI) = 1.12-1.80 > 0), total N (TN) (SMD = 1.33; 95% CI 0.98-1.68 > 0), total P (SMD = 0.73; 95% CI 0.26-1.20 > 0), alkali N (SMD = 0.86; 95% CI 0.52-1.21 > 0), available P (SMD = 1.28; 95% CI 0.75-1.81 > 0) and readily available potassium (K) (SMD = 1.20; 95% CI 0.75-1.65 > 0) concentrations but exhibited no significant effects on soil total K concentration (SMD = 0.17; 95% CI - 0.13-0.47 < 0). Plant hedgerows showed a greater effect on SOM increase than soil N, P, and K, and soil TN increase than the available state, but the opposite trend was observed for P and K. This meta-analysis can clarify the influence of plant hedgerows on soil nutrients and provide ideas for the prevention and control of agricultural NPSP.
富营养化是一个严重的环境问题，因为农业土地的土壤氮（N）和磷（P）流失会导致这种情况。植物篱是防止水土流失和减少农业面源污染（NPSP）的重要措施。本研究检索了 1980 年至 2020 年 3 月间发表的 3683 篇关于植物篱的研究论文。经过筛选，我们使用了 53 篇关于植物篱的有效论文，并用 Stata 15.1 进行元分析。结果表明，植物篱显著增加了土壤有机质（SOM）（标准化均数差（SMD）=1.46；95%置信区间（CI）=1.12-1.80>0）、总氮（TN）（SMD=1.33；95%CI 0.98-1.68>0）、总磷（SMD=0.73；95%CI 0.26-1.20>0）、碱解氮（SMD=0.86；95%CI 0.52-1.21>0）、有效磷（SMD=1.28；95%CI 0.75-1.81>0）和速效钾（SMD=1.20；95%CI 0.75-1.65>0）浓度，但对土壤全钾浓度（SMD=0.17；95%CI-0.13-0.47<0）没有显著影响。植物篱对 SOM 增加的影响大于土壤 N、P 和 K，对土壤 TN 增加的影响大于有效态，但 P 和 K 的趋势相反。这项元分析可以阐明植物篱对土壤养分的影响，为农业面源污染的防治提供思路。
