Recovery Role in Soil Structural, Carbon and Nitrogen Properties of the Conversion of Vegetable Land to Alfalfa Land in Northwest China
文献类型： 外文期刊
作者： Yu, Tiefeng 1 ; Lin, Fang 1 ; Liu, Xiaojing 1 ; Wang, Xiaowei 2 ;
作者机构： 1.Gansu Agr Univ, Pratacultural Coll, Lanzhou, Gansu, Peoples R China
2.Gansu Acad Agr Sci, Vegetable Res Inst, Lanzhou, Gansu, Peoples R China
关键词： Perennial crops; Vegetable crops; Soil fertility; Soil management; Soil quality
期刊名称：JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION （ 影响因子：3.872； 五年影响因子：3.771 ）
ISSN： 0718-9508
年卷期：
页码：
收录情况： SCI
摘要： Soil structural, carbon (C), and nitrogen (N) properties could be influenced by land-use change. The objective of this study was to investigate the effects of the conversion from vegetable (Brassica pekinensis) planting for 7 years (2007-2014) to alfalfa (Medicago sativa L.) planting with 5 nitrogen levels (N-0 similar to N-4) for 3 years (2015-2017) on soil structural, C, and N properties. After vegetable cultivation, soil structural, C, and N properties declined significantly. However, after alfalfa planting, especially in 2017, the lowest values of bulk density (N-1 = 1.32 g m(-3), N-2 = 1.33 g m(-3)) and the highest values of macroaggregate proportion (N-1 = 78.17%, N-2 = 77.33%) were obtained. The highest values of SOC (N-1 = 11.11 g kg(-1), N-2 = 11.08 g kg(-1)), SMBC (N-1 = 390.97 mg kg(-1)), and sucrase (N-1 = 17.47 mg g(-1) d(-1)) were appeared. The maximum values of available nitrogen (N-1 = 57.83 mg kg(-1), N-2 = 59.82 mg kg(-1)), SMBN (N-1 = 56.01 mg kg(-1), N-2 = 58.14 mg kg(-1)), and urease (N-2 = 2.71 mg g(-1) d(-1)) were obtained. Taken together, our findings suggest that the conversion of vegetable land to alfalfa land with low N level could significantly improve soil structural, C, and N properties.
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