DANG Xiao-hong,YU Yi,GAO Yong,et al.Analysis on Impact of PLA Barrier on Soil Particle sizes of Sand Dunes[J].Research of Soil and Water Conservation,2014,21(03):16-19,24.
PLA沙障对沙丘土壤粒径的影响分析
- Title:
- Analysis on Impact of PLA Barrier on Soil Particle sizes of Sand Dunes
- Keywords:
- PLA; ballast sand barrier; layout specifications; soil particle size
- 分类号:
- S152.3
- 摘要:
- PLA可降解纤维是一种新型的固沙材料，用它灌沙形成的筒状沙袋铺设于沙丘上，可有效改变近地表风沙流结构及地表粗糙度等。PLA沙袋沙障通过对地表风速影响，进而影响沙丘表层土壤粒径的重新分布。本次试验通过对不同铺设规格沙障沙丘0—11 cm深土壤粒径的测定，分析不同铺设规格和坡位等对土壤粒径的影响。结果表明：2 m×2 m铺设规格沙障对土壤粒径影响较大，土壤平均粒径比未铺设沙障沙丘的大16%，1 m×1 m规格影响最小；同种规格沙障在坡顶处土壤粒径变化最大，比未铺设沙障沙丘的大21%，迎风坡、背风坡分别比对照大3.9%，2.4%；土壤深度不同，粒径变化也不同，地表0—1 cm土壤粒径变化最大，比未铺设沙障沙丘的大16%。因此可知，沙障铺设后，使得沙丘表层的土壤粒径增大。
- Abstract:
- Biodegradable PLA fiber is a new type of fixing material. The tubular shapes of sandbags made of PLA are filling with sands, and are piled up on the sand dunes, which can effectively change the near-surface wind flow structure and roughness. Based on the impact to surface wind speed, PLA sandbag barriers can also impact the redistribution of soil particle sizes on the surface dunes. Through the measure of soil particle sizes in 0—11 cm in different specification sand barriers, this article discussed the impact of different specifications and different slope positions to soil particle sizes. The results showed that: specifications (2 m×2 m) of laid sand barrier has the greater impact on soil particle size, and soil particle sizes on average are 16% bigger than that of sand dunes without laid sand barriers. Instead, specification (1 m×1 m) showed minimum impact. Soil particle size in the same specification showed the most obvious change on the top position. They are 21% bigger than those of sand dunes without laid sand barriers. The soil particle sizes on windward slope of the leeward slope were 3.9% and 2.4% larger compared to the control; soil particle size changes with the different soil depth. Soil particle size of 0—1 cm depth changes most obviously, which is 16% bigger than that of sand dunes without sand barriers. Therefore, It can be seen that the sand particle size of dunes surface increases after the laying of sand barrier.
参考文献/References:
[1] 王涛,朱震达.我国沙漠化研究的若干问题[J].中国沙漠,2003,23(3):209-214.
[2] 李大勇.浅析我国土地沙漠化及治理中存在的问题[J].陕西广播电视大学学报,2008,10(2):35-37.
[3] 王淘,赵哈林,肖洪浪.中国沙漠化研究的进展[J].中国沙漠,1999,19(4):299-311.
[4] 高永,邱国玉,丁国栋,等.沙柳沙障的防风固沙效益研究[J].中国沙漠,2004,24(3):365-370.
[5] 凌裕泉.草方格沙障的防护效益:腾格里沙漠沙坡头地区流沙治理研究[M].银川:宁夏人民出版社,1980.
[6] 王振亭,郑晓静.草方格沙障尺寸分析的简单模型[J].中国沙漠,2002,22(3):229-232.
[7] 常兆丰,仲生年,韩福贵,等.粘土沙障及麦草沙障合理间距的调查研究[J].中国沙漠,2000,20(4):455-457.
[8] 高国雄,李广毅,高宝山,等.煤矸石障蔽对沙地土壤的改良作用研究[J].水土保持学报,2001,15(1):102-104.
[9] 王文彪,党晓宏,张吉树,等.库布齐沙漠北缘不同作物秸秆平铺式沙障防风效益研究[J].中国沙漠,2013,33(1):65-71.
[10] 高宝山,高国雄,朱首军.煤矸石沙障小气候效应的观测研究[J].陕西师范大学学报:自然科学版,1999,27(增刊):159-163.
[11] 王健,桑长青,何清.塔克拉玛干沙漠公路中段两侧不同下垫面的小气候分析[J].中国沙漠,2003,23(5):577-580.
[12] 李生宇,雷加强.草方格沙障的生态恢复作用:以古尔班通古特沙漠油田公路扰动带为例[J].干旱区研究,2003,21(1):7-10.
[13] 韩致文,刘贤万,姚正义,等.复膜沙袋阻沙体与芦苇高立式方格沙障防沙机理风洞模拟实验[J].中国沙漠,2000,20(1):40-44.
[14] 庞学勇,刘世全,刘庆,等.川西亚高山针叶林植物群落演替对土壤性质的影响[J].水土保持学报,2003,17(4):42-50.
[15] 魏义长,康玲玲,王云璋,等.水土保持措施对土壤物理性状的影响[J].水土保持学报,2003,17(5):114-116.
[16] 黄冠华,詹卫华.土壤颗粒的分形特征及其应用[J].土壤学报,2002,39(4):490-497.
[17] Chepil W S. Dynamics of wind erosion:V.The translocation and abrasive action of the wind[J]. Soil Science,1946,61(2):167-177.
[18] 虞毅,高永,汪季,等.一种分层采取土壤样品取土器[P].ZL201020633704.X.
[19] 刘雪梅,黄元仿.应用激光粒度仪分析土壤机械组成的实验研究[J].土壤通报,2005,36(4):579-582.
备注/Memo
收稿日期:2013-11-12;改回日期:2013-12-10。
基金项目:国家林业行业专项“风积沙产业化利用及其迹地植被营建技术研究”（201204205）
作者简介:党晓宏(1986-),男,陕西省合阳县人,博士研究生,研究方向为荒漠化防治。E-mail:dangxiaohong1986@126.com
通讯作者:高永(1962-),男,内蒙古包头人,博士,教授,博士生导师,主要从事荒漠化防治研究。E-mail:13948815709@163.com