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种植玉米对黄土坡面径流侵蚀特征及养分流失量的影响
王计磊1; 吴发启2
2016
Source Publication泥沙研究
Volume2016Issue:6Pages:44-50
Abstract

为了深入分析种植玉米对黄土区坡耕地径流侵蚀产沙特征及养分流失量的影响,采用人工降雨的模拟
方法,在玉米各生育期分别对坡面产流产沙特征及养分流失量进行研究。试验结果表明: 在80mm/h 降雨强
度下,随着玉米生育期的延伸,坡面产流产沙及养分流失量逐渐减少,且坡面产流产沙曲线呈逐渐稳定的趋
势。随着玉米的生长,3
°与15°坡面径流量分别由裸地38. 16L/m2 和55. 59L/m2 降至抽雄期20. 76L/m2 和
36. 92L/m2 ,坡面产沙量分别由裸地201. 47g /m2 和55. 59g /m2 降至抽雄期38. 30g /m2 和36. 92g /m2 ,坡面养
分流失抑制率分别由拔节初期20. 40% ~ 39. 39% 和3. 03% ~ 25. 35% 增至抽雄期79. 23% ~ 85. 73% 和
69. 29% ~ 75. 00%。研究表明玉米生长初期是水土及养分流失防控的关键时期,应增加水土保持措施,避免
坡面裸露时间过长,减少水土流失的发生。

Other Abstract

Maize is widely planted in the Loess Plateau in China. A simulated rainfall experiment was conducted
to study the characteristics of runoff, sediment yield and the loss amount of soil nutrient on slopes at different
maize growth stages. Rainfall intensity in this study was 80mm/h. The results showed that the growth ofmaize had important impact on the loss amount of the runoff, sediment and soil nutrient under rainfall conditions.
With the extension growth of maize, the loss amount of runoff and sediment yield showed a reducing trend
and the process curve of runoff and sediment yield became smoother. The runoff volume decreased from 38. 16
L /m2 in bare land to 20. 76L /m2 in tasseling stage of corn on the slope with 3 degrees. The sediment yield decreased
from 201. 47g /m2 in bare land to 38. 30g /m2 in tasseling stage of corn. The nutrient loss inhibition rate
increased from 20. 40% ~ 39. 39% in early jointing stage of corn to 79. 23% ~ 85. 73% in tasseling stage of
corn. The runoff volume decreased from 55. 59L /m2 in bare land to 36. 92 L /m2 in tasseling stage of corn on
the slope with 15 degrees. Sediment yield decreased from 545. 47g /m2 in bare land to 161. 90g /m2 in tasseling
stage of corn. Nutrient loss inhibition rate increased from 3. 03% ~ 25. 35% in early jointing stage of corn to
69. 29% ~ 75. 00% in tasseling stage of corn. The early growth stage of maize is the key period to control losses
of soil,water and nutrient. In order to reduce soil and water loss, it is necessary to increase the distribution
of soil and water conservation measures,and to decrease the bare time of slope at the early period.

Keyword玉米 坡耕地 土壤侵蚀 养分流失 地表径流
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8709
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学水土保持研究所
2.西北农林科技大学资源环境学院
Recommended Citation
GB/T 7714
王计磊,吴发启. 种植玉米对黄土坡面径流侵蚀特征及养分流失量的影响[J]. 泥沙研究,2016,2016(6):44-50.
APA 王计磊,&吴发启.(2016).种植玉米对黄土坡面径流侵蚀特征及养分流失量的影响.泥沙研究,2016(6),44-50.
MLA 王计磊,et al."种植玉米对黄土坡面径流侵蚀特征及养分流失量的影响".泥沙研究 2016.6(2016):44-50.
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