干旱区生态环境知识资源中心(Arid): 种植年限对荒漠草原区苜蓿地表层土壤特性的影响

Arid

	种植年限对荒漠草原区苜蓿地表层土壤特性的影响
其他题名	Effects of planting alfalfa on soil quality in desert steppe of Ningxia
	陈林; 杨新国; 宋乃平; 李学斌; 翟德苹
来源期刊	浙江大学学报. 农业与生命科学版
ISSN	1008-9209
出版年	2014
卷号	40 期号:5 页码:541-550
中文摘要	采用时空互代法,研究宁夏中部荒漠草原区不同种植年限苜蓿地表层土壤理化性状特征。结果表明:3种粒径(>0.5 mm,0.106~0.25 mm,<0.106 mm)间土壤的pH、电导率(electrical conductivity,EC)、有机质(soil organic matter,SOM)、CaCO_3、全氮(total nitrogen,TN)、碱解氮(available nitrogen,AN)、全磷(total phosphorus,TP)和速效磷(available phosphorus,AP)在同一种植年限间差异均无统计学意义(P>0.05),但>0.5 mm和<0.106 mm粒径的土壤活性有机碳(soil active organic carbon,SAOC)含量均显著高于0.106~0.25 mm粒径,相比差异有统计学意义(P<0.05);随着种植苜蓿年限的增加,pH值有所降低,且苜蓿种植后对20~40 cm土层土壤pH值的影响大于0~20 cm;而EC值在苜蓿不同种植年限间波动较大,相比差异均无统计学意义(P>0.05),多数年限间0~20 cm土层土壤EC值高于20~40 cm土层(P<0.05);SOM在苜蓿种植后的各年限间均较草地高,相比差异无统计学意义(P>0.05),0~20 cm以SOM较20~40 cm高;0~20 cm土层>0.5 mm和<0.106 mm粒径的SAOC随种植年限增加呈先升高(1 a)后降低(4~12 a)的趋势,而20~40 cm则基本没有变化。0~40 cm土层中>0.5 mm和<0.106 mm粒径的SAOC在各种植年限间均显著高于0.106~0.25 mm,相比差异有统计学意义(P<0.05),而0.106~0.25 mm粒径的SAOC在不同年限间差异无统计学意义(P>0.05);0~40 cm土壤TN和AN波动较大,但没有显著提高土壤氮的质量分数,相比差异无统计学意义(P>0.05);0~40 cm土层土壤TP和0~20 cm土层土壤AP的变化趋势均为随着种植年限(0~12 a)的增加而增大,而20~40 cm土层的AP则表现为"M"型波动。1~12 a间0~20 cm土层的TP均显著低于20~40 cm,相比差异有统计学意义(P<0.05);0~20 cm土层土壤C/N在同一年限均高于20~40 cm土层,在12 a时,各粒径C/N显著减小,相比差异有统计学意义(P<0.05);0~40 cm土壤CaCO_3随着种植年限的增加呈升高的趋势,且在种植苜蓿12 a后20~40 cm土层的CaCO_3显著高于0~20 cm,相比差异有统计学意义(P<0.05)。
英文摘要	Soil quality plays a crucial role in sustaining agricultural systems productivity, and it is important in sustaining ecosystem. What about the soil quality in different planting years of alfalfa (Medicago sativa) in the steppe desert of Ningxia in China? That is not yet completely understood. The objective of this study was to investigate the soil physical and chemical properties of different soil particle diameters (>0.5 mm, 0.106-0.25 mm and <0.106 mm) after planting alfalfa for 0-12 years. By using the method of replacing time with space, an analysis was made on the dynamic changes of top soil (0-20 cm and 20-40 cm) nutrients and soil particle。 The results showed that there was no significant difference between the different soil particle diameters in the same period of the pH, electrical conductivity (EC), soil organic matter (SOM), CaCO_3, total nitrogen (TN), available nitrogen (AN), total phosphorus (TP) and available phosphorus (AP) (P>0.05), but the soil active organic carbon (SAOC) contents of the soil particle with diameters of >0.5 mm and <0.106 mm were significantly higher than that of soil particle with diameters of 0.106-0.25 mm (P<0.05). With the increasing of planting years, the pH values decreased, and after planting alfalfa, it was greater affected in 20-40 cm soil layer than 0-20 cm soil layer. The EC values were fluctuated in different planting years, but there were not significant (P>0.05), and the EC values of 0-20 cm soil layer were significantly higher than that of 20-40 cm soil layer in most planting years. The SOM contents in each planting year were higher than the grass, but there was no significant difference (P>0.05), and the SOM contents of soil particle with diameters of >0.5 mm and <0.106 mm in 0-20 cm soil layer were increased firstly (1 year) and then decreased (4-12 years) with the increase of planting years, while the SAOC contents of 20-40 cm soil layer remained unchanged. The SAOC contents of soil particle with diameters of >0.5 mm and <0.106 mm in 0-40 cm soil layer in each planting year were significantly higher than that of soil particle with diameters of 0.106-0.25 mm (P<0.05), but there was no significant difference in each planting year (P>0.05). The TN and AN contents in 0-40 cm soil layer fluctuated a lot and showed no influence on TN content. The TP contents of 0-40 cm soil layer and the AP contents of 0-20 cm soil layer showed the increasing trend (0-12 years), and the AP contents of 20-40 cm soil layer showed the "M" type fluctuations. The TP contents of 0-20 cm soil layer were significantly lower than those of the 20-40 cm soil layer in 1-12 years (P<0.05). The C/N values of 0-20 cm soil layer were higher than those of the 20-40 cm soil layer in the same planting years, and in 12 years, the C/N value was significantly lower than other years (P<0.05). The CaCO_3 contents of 0-40 cm soil layer showed an increasing trend with the increasing of planting years, and the CaCO_3 contents of 20-40 cm soil layer were significantly higher than those of 0-20 cm soil layer (P<0.05). In conclusion, with the increasing of planting years, there was significant difference only between the soil particle diameter and the SAOC content (P<0.05), and the soil quality showed temporal variability.
中文关键词	荒漠草原区 ; 苜蓿 ; 不同粒径 ; 土壤理化性状 ; 响应
英文关键词	desert steppe alfalfa different soil particle diameters soil physical and chemical properties response
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:5253775
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/2XILL650/232007
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, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	陈林,杨新国,宋乃平,等. 种植年限对荒漠草原区苜蓿地表层土壤特性的影响[J]. 宁夏大学,2014,40(5):541-550.
APA	陈林,杨新国,宋乃平,李学斌,&翟德苹.(2014).种植年限对荒漠草原区苜蓿地表层土壤特性的影响.浙江大学学报. 农业与生命科学版,40(5),541-550.
MLA	陈林,et al."种植年限对荒漠草原区苜蓿地表层土壤特性的影响".浙江大学学报. 农业与生命科学版 40.5(2014):541-550.