干旱区生态环境知识资源中心(Arid): 荒漠草原区不同粒径土壤理化性质对苜蓿种植年限的响应

Arid

	荒漠草原区不同粒径土壤理化性质对苜蓿种植年限的响应
其他题名	Effect of Soil Physical and Chemical Properties on Alfalfa Grassland of Different Planting Years in Desert Steppe Region
	陈林; 杨新国; 宋乃平; 肖绪培; 王兴
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2014
卷号	28 期号:2 页码:105-111
中文摘要	为了探明宁夏中部荒漠草原区长期种植苜蓿对土壤理化性质的影响,采用时空互代法,选取不同种植年限苜蓿地为研究对象,以天然草地为对照,分析不同种植年限苜蓿地不同粒径土壤颗粒的理化性质。结果表明,种植苜蓿后 <0.106 mm的颗粒含量较草地(0a)的含量高,一定程度上促进土壤的细粒化。不同粒径间的pH值、EC、有机质、全氮、碱解氮、全磷和速效磷在同一种植年限间均无显著差异(p>0.05),但 >0.5mm和 <0.106mm粒径的土壤活性有机碳含量均显著高于0.106~0.25 mm粒径(p<0.05)。随着种植年限的增加,pH值有所降低,当苜蓿严重退化后(>22a),pH 值略有上升,而EC值则相反。苜蓿种植后对20-40cm pH值的影响要大于0-20cm。土壤有机质含量在各年限间差异不显著(p>0.05),当苜蓿严重退化后(>22a),其显著降低(p<0.05)。0-20cm活性有机碳含量随种植年限增加呈先升高后降低的趋势,而20-40cm则保持不变或略呈降低的趋势。0-20cm中 >0.5 mm和 <0.106 mm粒径的活性有机碳含量在各种植年限间均显著高于20-40cm(p<0.05),而0.106~0.25 mm粒径在不同土层间则无显著差异(p>0.05)。0-40cm土壤全磷含量的变化趋势均为先升高(0~22a)后降低(>22a),而0-20cm速效磷含量呈升 - 降,20-40cm速效磷则表现为升-降-升-降的M型波动。0-20cm全磷含量显著低于20-40cm(p<0.05)。0-40cm土壤全氮、碱解氮含量属于低和极低等级,且没有表现出豆科植物根系的固氮作用。
英文摘要	In order to know the different particles of soil physical and chemical properties in alfalfa grassland of different planting years,by using the method of replacing time with space,an analysis was made on the dynamic changes of top soil(0-40cm)nutrients and soil particle during the planting years.The results showed that:The particles contents of <0.106 mm in planting alfalfa plots were all higher than particles contents in the grass,so it could to promote the fine-grained soil particles contents by planting alfalfa.There was no significant difference between the different soil particle diameters(>0.5mm,0.106~0.25 mm and <0.106mm)in the same period of the pH,EC,soil organic matter(SOM),total nitrogen(TN),available nitrogen(AN),total phosphorus(TP)and available phosphorus(AP)(p>0.05),but the >0.5 mm and <0.106mm soil particle of soil active organic carbon content were significantly higher than 0.106~0.25mm soil particle(p<0.05).With the increase of years of planting alfalfa,the soil pH values decreased,when alfalfa severely degraded(>22a),pH values increased slightly,and the EC values were opposite.After planting alfalfa,it was effected on pH values of 20-40cm soil layer greater than that of 0-20cm soil layer.There were no significant difference between the soil organic contents in each planting year(p>0.05),when alfalfa severely degraded(>22a),soil organic contents were significantly lower(p<0.05),soil organicmatter contents of 0-20cm soil layer were higher than that of the 20-40cm soil layer.The soil active organic carbon contents of 0-20cm soil layer increased first and then decreased with the increase of planting years,while the soil active organic carbon contents of 20-40cm soil layer remain unchanged or slightly de-creased.The soil active organic carbon contents of >0.5mm and <0.106mm soil particle diameters in 0-20cm soil layer in each planting years were significantly higher than that of 20-40cm soil layer(p<0.05),but there was no significant difference between the soil active organic carbon contents of 0.106~0.25 mm soil particle diameters(p>0.05).The total phosphorus contents of 0-20cm and 20-40cm soil layers were showed the increased first(0-22a)and then decreased(>22a)trend,and the soil available phosphorus contents of 0-20cm soil layer were showed the same trend,but available phosphorus contents of 20-40cm soil layer were showed as theMtype fluctuations.The total phosphorus contents of 0-20cm soil layer were significantly lower than that of 20-40cm soil layer(p<0.05).The soil nitrogen and available nitrogen contents in 0-40cm soil layer were low and very low levels,and were not showed the roots of legume nitrogen fixation which could improve soil nitrogen content.
中文关键词	苜蓿 ; 土壤理化性质 ; 种植年限 ; 风沙区
英文关键词	alfalfa soil physical and chemical properties planting years sandy area
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY ; AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5241675
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231764
作者单位	宁夏大学西部生态与生物资源开发联合研究中心, 西北退化生态系统恢复与重建教育部重点实验室;;西北土地退化与生态恢复国家重点实验室培育基地
推荐引用方式 GB/T 7714	陈林,杨新国,宋乃平,等. 荒漠草原区不同粒径土壤理化性质对苜蓿种植年限的响应[J]. 宁夏大学,2014,28(2):105-111.
APA	陈林,杨新国,宋乃平,肖绪培,&王兴.(2014).荒漠草原区不同粒径土壤理化性质对苜蓿种植年限的响应.水土保持学报,28(2),105-111.
MLA	陈林,et al."荒漠草原区不同粒径土壤理化性质对苜蓿种植年限的响应".水土保持学报 28.2(2014):105-111.