[1]雷东,韩鲁艳,焦菊英,等.模拟降雨条件下黄土丘陵区主要植物种子的流失特征[J].水土保持研究,2011,18(01):1-6.
　LEI Dong,HAN Lu-yan,JIAO Ju-ying,et al.Seed Loss Characteristics of Main Species in Loess Hilly-gullied Area by Simulated Rainfall Erosion[J].Research of Soil and Water Conservation,2011,18(01):1-6.
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模拟降雨条件下黄土丘陵区主要植物种子的流失特征

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 18 期数: 2011年01期 页码: 1-6 栏目: 出版日期: 2011-02-20
Title:
Seed Loss Characteristics of Main Species in Loess Hilly-gullied Area by Simulated Rainfall Erosion
作者:
雷东1, 韩鲁艳2,3, 焦菊英1,2, 温仲明1,2
1. 西北农林科技大学 资源环境学院, 陕西 杨凌 712100;
2. 中国科学院 水利部 水土保持研究所, 陕西 杨凌 712100;
3. 山东民族技师学院, 山东 青州 262500
Author(s):
LEI Dong1, HAN Lu-yan2,3, JIAO Ju-ying1,2, WEN Zhong-ming1,2
1. College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Chinese Academy of Sciences & Ministry of Water Resources, Yangling, Shaanxi 712100, China;
3. Shandong National Technician College, Qingzhou, Shandong 262500, China
关键词:
降雨侵蚀; 种子流失; 种子形态; 黄土丘陵区
Keywords:
water erosion; seed loss; seed morphology; loess hilly-gullied area
分类号:
S154;S157
摘要:
黄土丘陵沟壑区植被稀疏，土壤侵蚀严重，会造成种子随地表径流和泥沙运移发生流失，从而对植被恢复产生影响。采用人工模拟降雨试验，研究了该区29个主要物种种子在不同降雨侵蚀条件下（降雨强度100 mm/h和150 mm/h与坡度15°、20°、25°和30°的不同组合，降雨历时为1 h）的流失特征，分析了黄土丘陵区主要物种种子的流失特征。结果表明：在所有供试的物种中有79.3%的物种种子发生了流失，平均流失率为27.4%。雨强越大，种子流失率越高，而坡度的影响不如雨强明显。种子的流失特征也受其质量、形状、大小和生理特征等的影响，发生流失的种子质量（M）多在50 mg以下，当M＜10 mg时，种子质量越小，流失率越大，而当10 mg＜M＜50 mg时，种子流失主要受形状特征及附属物的影响，圆形和椭圆形的种子发生流失的机率最大。
Abstract:
For sparse vegetation and serious soil erosion in Loess Hilly-gullied area, the seed loss by surface runoff and sediment transport may has impacts on vegetation restoration. To analyze the seed loss characteristics of the main species in the loess hilly-gullied area, rainfall simulation experiments were carried out over 1 m2 plots on 15°, 20°, 25° and 30° loess slopes for a 60-minute duration with intensities of 100 mm/h and 150 mm/h. The results showed that, there were 23 species (accounting for 79.3%) having seed loss with an average seed loss rate of 27.4%, heavier rainfall leads to higher seed loss ratio on same slope, while the effect of slope on seed loss was not more significant than rainfall intensity. The seed loss was also affected by the mass, shape, size and physiological feature of seed itself. Most seeds occurred seed loss with a mass below 50 mg, seed loss ratio has negative correlation with seed mass when it below 10 mg; when 10 mg < seed mass < 50 mg, seed shape and appendices come to be the main factors affecting seed loss, the round and oval seeds were prone to loss.

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备注/Memo

收稿日期:2010-11-16;改回日期:2010-11-29。
基金项目:国家自然科学基金面上项目“黄土丘陵沟壑区土壤种子库分布格局及植被恢复的土壤侵蚀解释”（40771126）；西北农林科技大学基本科研业务费专项“黄土高原植被发育与恢复演替研究”（CX200906）
作者简介:雷东（1986- ），男，河南省漯河市人，硕士研究生，研究方向为植被恢复与水土保持。E-mail：ld04109@nwsuaf.edu.cn
通讯作者:焦菊英（1965- ），女，陕西省宝鸡市人，博士，研究员，研究方向为恢复生态与水土保持环境效应评价。E-mail：jyjiao@ms.iswc.ac.cn

更新日期/Last Update: 1900-01-01