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Alternative TitleEffects of shelter forest on rates and spatial patterns of soil erosion in a cultivated land
伍佐1,2; 苏正安1; 王勇2; 张信宝1; 周涛1,3; 王晓艺1,2; 何周窈1,4; 刘翊涵1,5
Source Publication草业科学
Contribution Rank1
Abstract利用~(137)Cs示踪技术对张家口坝上地区农田防护林对农耕地土壤侵蚀速率及其空间分布格局的影响进行了初步研究。结果表明:1)农耕地土壤剖面~(137)Cs呈均匀分布,防护林土壤剖面~(137)Cs呈指数型分布;2)不同土地利用类型下土壤~(137)Cs面积活度表现为沿主风向的防护林[(3 148.38 228.91)Bq·m~(-2)] >垂直于主风向的防护林[(2 548.09 202.56)Bq·m~(-2)] >农耕地[(1 687.43 174.99)Bq·m~(-2)],土壤侵蚀速率表现为农耕地[(4 446.04 208.68)t·(km~2·a)~(-1)] >垂直于主风向的防护林[(2 514.56 181.08)t·(km~2·a)~(-1)] >沿主风向的防护林[(1 357.32 301.56)t·(km~2·a)~(-1)];3)距离防护林越近的区域,农耕地土壤~(137)Cs面积活度越高,土壤侵蚀速率越小,而越靠近农耕地中心部位,土壤~(137)Cs面积活度越低,土壤侵蚀模数越高,这表明防护林成林后在减弱耕地风沙侵蚀方面发挥了重要作用;4)垂直于主风向的防护林土壤~(137)Cs面积活度总体呈由西南向东北降低的趋势,即越靠近沿主风向的防护林,土壤~(137)Cs面积活度越高,土壤侵蚀模数越低;5)沿主风向的防护林土壤~(137)Cs面积活度显著高于垂直于主风向的防护林,这表明沿主风向防护林的土壤侵蚀速率显著低于垂直于主风向的防护林。综上可知,农田防护林对我国北方农耕地土壤侵蚀空间分布格局具有显著影响,能够显著减弱农耕地风力侵蚀速率。
Other AbstractThe ~(137)Cs tracer technique was used to study the effects of shelter forests on rates and spatial patterns of soil erosion in a cultivated land(CL)in the Bashang Region of Zhangjiakou City.The results showed that ~(137)Cs was uniformly distributed in the soil profile of CL, and an exponentially decreasing trend of ~(137)Cs concentration from the top to bottom layer of soil profile was observed in a shelter forest land(SFL).~(137)Cs inventories in SFL along the primary wind direction(ASFL),SFL perpendicular to the primary wind direction(PSFL), and CL were estimated to be 3 148.38 228.91 Bq·m~(-2), 2 548.09 202.56 Bq·m~(-2) and 1 687.43 174.99 Bq·m~(-2), respectively.~(137)Cs inventories in ASFL were the highest, while those in CL were the lowest.Soil erosion rates in CL, PSFL, and ASFL were estimated to be 4 446.04 208.68 t·(km~2·a)~(-1), 2 514.56 181.08 t·(km~2·a)~(-1), and 1 357.32 301.56 t·(km~2·a)~(-1), respectively.Meanwhile, the effects of shelter forest on rates and spatial patterns of soil erosion in CL were evident.In CL, ~(137)Cs inventories exhibited a decreasing trend and soil erosion rates exhibited an increasing trend as the distance from FSL increased, indicating that shelter belts play important roles in protecting the CL from wind erosion because the surrounding shelter forest is mature.Simultaneously, as distance from ASFL decreased, ~(137)Cs inventories in PSFL exhibited an increasing trend.Additionally, ~(137)Cs inventories in ASFL were obviously higher than those in PSFL, indicating that PSFL experienced greater soil loss than did ASFL.These results indicate that the surrounding shelter belts play a critical role in altering the spatial patterns of soil erosion and reducing wind erosion rates in the CL in northern China.
Keyword土壤侵蚀速率 空间格局 农田防护林 农耕地
Indexed ByCSCD
Citation statistics
Document Type期刊论文
Corresponding Author苏正安
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
伍佐,苏正安,王勇,等. 农田防护林对耕地土壤侵蚀速率和空间分布格局的影响[J]. 草业科学,2020,37(7):1218-1226.
APA 伍佐.,苏正安.,王勇.,张信宝.,周涛.,...&刘翊涵.(2020).农田防护林对耕地土壤侵蚀速率和空间分布格局的影响.草业科学,37(7),1218-1226.
MLA 伍佐,et al."农田防护林对耕地土壤侵蚀速率和空间分布格局的影响".草业科学 37.7(2020):1218-1226.
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