干旱区生态环境知识资源中心(Arid): 黄土高原半干旱区苜蓿草地土壤干燥化特征与粮草轮作土壤水分恢复效应

Arid

	黄土高原半干旱区苜蓿草地土壤干燥化特征与粮草轮作土壤水分恢复效应
其他题名	Soil desiccation characteristics of alfalfa grasslands and soil water restoration effects in alfalfa-grain crop rotations on the semi-arid areas of the Loess Plateau
	王美艳; 李军; 孙剑; 王学春; 方新宇; 任晶晶
ISSN	1000-0933
出版年	2009
卷号	29 期号:8 页码:4526-4534
中文摘要	实地测定了黄土高原半干旱区固原不同生长年限苜蓿草地和连作8a苜蓿草地翻耕轮作不同年限粮食作物后深层土壤水分特征,分析了苜蓿草地土壤干燥化特征和粮草轮作对土壤水分的恢复效应.结果表明:(1)苜蓿连作1a、5a、8a和12a等4类苜蓿草地0～1000cm土层平均土壤湿度值为6.6%,平均土壤水分过耗量702.8mm,平均土壤干燥化速率147.1mm/a,达到强烈干燥化程度,苜蓿连作5a土壤干层深度超过1000cm,苜蓿连作8a土壤干层深度超过1360cm,苜蓿草地合理利用年限为7a.(2)连作8a苜蓿草地翻耕并轮作4～7a和25a粮食作物等5类粮田0～1000cm土层土壤湿度介于6.74%～11.95%,土壤贮水量恢复值介于210.6～887.3mm,平均土壤水分恢复速率为80.8mm/a.轮作6a后粮田土壤干层轻度恢复程度以上深度达到1000cm.通过粮草轮作使苜蓿草地土壤湿度恢复到当地土壤稳定湿度需要13a以上.黄土高原半干旱区适宜的粮草轮作模式为:7a苜蓿13a粮食作物.
英文摘要	Soil water consumption characteristics of deep soil profile on different growth age alfalfa grasslands and soil water restoration effects in alfalfa-grain crop rotation fields were investigated and analyzed at Guyuan of semi-arid areas of the Loess Plateau. The results showed as followings: (1) Average soil moisture in 0 - 1000cm soil profile on 4 kinds of 1 -12 year-old alfalfa grasslands was 6.6% , and soil water overuse amount was 702. 8mm, and soil desiccating rate was 147. 1mm per year, the soil desiccation intensity was strong desiccated. Thickness of desiccated soil layers was over 1000cm on the 5 year-old alfalfa grassland, and it was over 1360cm on 8 year-old alfalfa grassland. Suitable age for alfalfa grassland use was 7 year-old. (2) Soil moisture in 0 - 1000cm soil profile on 5 kinds of 4 -7 years and 25 years alfalfa-grain crop rotation fields ranged from 6. 74% to 11. 95% , and soil water restoration amount was 210. 6 - 887. 3mm, and average soil water restoring rate was 80. 8mm per year. Depth of restored soil layers over slight restoration intensity was over 1000cm on rotated grain crop fields for 6 years. Required years for soil moisture of desiccated soil layers restored to local soil stable moisture by alfalfa-grain crop rotations was over 13 years. Suitable alfalfa-grain crop rotation on the semi-arid area was 7 years alfalfa and 13 years grain crops.
中文关键词	黄土高原 ; 半干旱区 ; 苜蓿草地 ; 土壤干层 ; 粮草轮作 ; 土壤水分恢复
英文关键词	the Loess Plateau semi-arid area alfalfa grassland desiccated soil layer alfalfa-grain crop rotation soil water restoration
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:3754551
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/224063
作者单位	西北农林科技大学农学院, 杨凌, 陕西 712100, 中国
推荐引用方式 GB/T 7714	王美艳,李军,孙剑,等. 黄土高原半干旱区苜蓿草地土壤干燥化特征与粮草轮作土壤水分恢复效应[J]. 西北农林科技大学,2009,29(8):4526-4534.
APA	王美艳,李军,孙剑,王学春,方新宇,&任晶晶.(2009).黄土高原半干旱区苜蓿草地土壤干燥化特征与粮草轮作土壤水分恢复效应.,29(8),4526-4534.
MLA	王美艳,et al."黄土高原半干旱区苜蓿草地土壤干燥化特征与粮草轮作土壤水分恢复效应".29.8(2009):4526-4534.