干旱区生态环境知识资源中心(Arid): 宁南山区苜蓿地土壤水分和养分变异规律研究

Arid

	宁南山区苜蓿地土壤水分和养分变异规律研究
其他题名	Variations of Soil Moisture and Nutrients in Alfalfa Field in Southern Ningxia Hui Autonomous Region
	潘占兵; 李生宝; 蔡进军; 董立国; 王月玲; 季波
来源期刊	水土保持通报
ISSN	1000-288X
出版年	2011
卷号	31 期号:2 页码:61-67
中文摘要	以宁南半干旱黄土丘陵区3年生、7年生、11年生、19年生，以及7年生上坡、中坡、下坡苜蓿地为研究对象，分析了苜蓿地0-5 m土壤干层及土壤养分的消长规律。研究结果表明:(1)坡位与种植年限均对土壤水分产生影响，上坡苜蓿地0-5 m土壤平均含水量为6.34%，显著小于中坡和下坡；不同旱作年限苜蓿地0-5 m土壤含水量排序为:3年生>7年生>19年生>11年生；土壤干燥化指数SDI排序为:上坡 >中坡>下坡；3年生>7年生>1，9年生>11年生，土壤干燥化程度随着土层深度的增加而减弱。待苜蓿老化后土壤水分可以得到恢复，土壤干燥化程度降低，但这一过程需要较长的时间。(2)在土壤旱化过程中，随着坡位的下降，苜蓿地0-100 cm层土壤平均有机质、全氮、速效氮、全磷、速效磷、速效钾含量增加；随着土层深度的增加，土壤有机质、全氮、速效氮、全磷、速效磷下降。随着苜蓿旱作时间的延长，土壤有机质、全氮、速效氮、速效磷、全磷、速效磷含量呈下降的趋势；待苜蓿老化严重时，土壤有机质、全氮开始逐渐积累，但仍然处于低水平状态。
英文摘要	In the semi-arid hilly region of South Ningxia Hui Autonomous Region,three-year,seven-year,eleven-year,and nineteen-year old alfalfa fields and seven-year old alfalfa fields at uphill,middle slope,and downhill were taken as study objects.The dynamics of the dried soil layer(0-5 m)and soil moisture and nutrients were analyzed.The results show that both slope position and plant age affected soil moisture contents.The average moisture content of 0-5 m soil profile on the uphill alfalfa field was 6.34%,which was substantially lower than that on middle slope and downhill fields.The average moisture contents in 0-5 m soil profile decreased on the alfalfa fields as in order of three-year,seven-year,nineteen-year,and elevenyear,and soil drying index(SDI)decreased as in order of uphill,middle slope,downhill and three-year,seven-year,nineteen-year,and eleven-year.The dying degree declined as soil depth increased.After the alfalfa aged,soil moisture content could recover but took a long time.On all the alfalfa fields in this study,the average content of soil organic matter,total N,available N,total P,available P,and available K all increased in the fields from uphill to downhill.As the soil depth increased,the soil organic matter,total N,available N,total P,and available P decreased.As the age of alfalfa increased,the soil organic matter,total N,total P,available P,and available K exhibited a declining trend,but the available N increased first and then decreased with the age of alfalfa in the field.When alfalfa field was very old,the soil organic matter and total N began to accumulate but was still at a relatively low level.
中文关键词	苜蓿地 ; 含水量 ; 坡位 ; 干层 ; 土壤养分
英文关键词	alfalfa fields soil moisture content slope position dried soil layer soil nutrients
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:4202936
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/227053
作者单位	宁夏农林科学院荒漠治理研究所, 银川, 宁夏 750002, 中国
推荐引用方式 GB/T 7714	潘占兵,李生宝,蔡进军,等. 宁南山区苜蓿地土壤水分和养分变异规律研究[J],2011,31(2):61-67.
APA	潘占兵,李生宝,蔡进军,董立国,王月玲,&季波.(2011).宁南山区苜蓿地土壤水分和养分变异规律研究.水土保持通报,31(2),61-67.
MLA	潘占兵,et al."宁南山区苜蓿地土壤水分和养分变异规律研究".水土保持通报 31.2(2011):61-67.