干旱区生态环境知识资源中心(Arid): 陇中黄土高原不同草田轮作模式土壤碳组分的差异研究

Arid

	陇中黄土高原不同草田轮作模式土壤碳组分的差异研究
其他题名	Soil carbon fraction differences under different grass-crop rotations on the Loess Plateau, Central Gansu
	赵靖静 1; 罗珠珠 2; 张仁陟 3; 蔡立群 2; 李玲玲 3; 牛伊宁 3
来源期刊	草业学报
ISSN	1004-5759
出版年	2016
卷号	25 期号:2 页码:58-67
中文摘要	通过田间定位试验,研究黄土高原西部旱农区多年生苜蓿草地(L-L)及苜蓿耕翻轮作处理苜蓿-休闲(L-F)、苜蓿-小麦(L-W)、苜蓿-玉米(L-C)、苜蓿-马铃薯(L-P)、苜蓿-谷子(L-M)对土壤总有机碳(TOC)、易氧化有机碳(ROC)、轻组有机碳(LFOC)及重组有机碳(HFOC)的影响。结果表明,在0~200 cm土层,不同轮作模式下土壤总有机碳含量及土壤各有机碳组分均表现为随土层加深呈波动下降趋势,其中TOC、ROC、HFOC含量最高值和最低值分别出现在苜蓿连作表层(0~5 cm)和苜蓿轮作(小麦)中层(30~50 cm) ,LFOC最高值和最低值分别出现在苜蓿轮作(马铃薯)表层(0~5 cm)和苜蓿轮作(玉米)底层(170~200 cm)。与苜蓿连作模式相比,苜蓿轮作(小麦、玉米、马铃薯、谷子)会降低TOC、ROC、HFOC含量,增加LFOC含量,其中TOC含量分别降低17.44%,9.25%,18.40%和9.34%;ROC含量分别降低28.10%,8.52%,29.75%和23.17%;HFOC含量分别降低18.80%,10.06%,20.53%和12.50%;LFOC分别增加7.41%,5.56%,22.22%和57.41%。可见,苜蓿种植多年耕翻轮作粮食作物后降低了土壤总有机碳水平,且对有机碳各组分的影响存在显著差异。
英文摘要	Field experiments investigating the effect of continuous lucerne (Medicago sativa) (L-L) and five rotation systems [lucerne-fallow (L-F), lucerne-wheat (L-W), lucerne-corn (L-C), lucerne-potato (L-P), lucerne-millet (L-M)] on total organic carbon (TOC), readily oxidation organic carbon (ROC), light fraction organic carbon (LFOC) and heavy fraction organic carbon (HFOC) in a typical arid area of the Western Loess Plateau. The results showed that under different rotation systems TOC and soil organic carbon fractions decreased with increasing soil depth (0-200 cm soil depth). The highest TOC, ROC and HFOC values were found in the surface soil layer (0-5 cm) under the L-L rotation system, and the lowest values at mid depths (30-50 cm) under the L-W rotation system. The highest and lowest values for LFOC were found in the surface soil layer (0-5 cm) under the L-P rotation and the bottom soil layer (170-200 cm) under the L-C rotation, respectively. Compared with L-L rotation, the L-W, L-C, L-P and L-M rotations reduced TOC by 17.4%, 9.3%, 18.4% and 9.3%, respectively. Similarly, ROC was reduced by 28.1%, 8.5%, 28.1% and 23.2% and HFOC by 18.8%, 10.1%, 20.5% and 12.5% respectively. However, LFOC increased by 7.4%, 5.3%, 22.2% and 57.4% under L-W, L-C, L-P and L-M rotations, respectively. It was concluded that lucerne-grain rotation systems reduce TOC.
中文关键词	黄土高原 ; 苜蓿 ; 轮作 ; 土壤有机碳组分
英文关键词	Loess Plateau lucerne rotation soil organic carbon fractions
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5648383
来源机构	甘肃农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234002
作者单位	1.甘肃农业大学资源与环境学院, 兰州, 甘肃 730070, 中国; 2.甘肃农业大学资源与环境学院, 甘肃省干旱生境作物学重点实验室, 兰州, 甘肃 730070, 中国; 3.甘肃省干旱生境作物学重点实验室, 甘肃省干旱生境作物学重点实验室, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	赵靖静,罗珠珠,张仁陟,等. 陇中黄土高原不同草田轮作模式土壤碳组分的差异研究[J]. 甘肃农业大学,2016,25(2):58-67.
APA	赵靖静,罗珠珠,张仁陟,蔡立群,李玲玲,&牛伊宁.(2016).陇中黄土高原不同草田轮作模式土壤碳组分的差异研究.草业学报,25(2),58-67.
MLA	赵靖静,et al."陇中黄土高原不同草田轮作模式土壤碳组分的差异研究".草业学报 25.2(2016):58-67.