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	Long-term applications of chemical and organic fertilizers on plant-available nitrogen pools and nitrogen management index
	Gong, Wei1,2; Yan, Xiaoyuan1; Wang, Jingyan2; Hu, Tingxing2; Gong, Yuanbo2
刊名	BIOLOGY AND FERTILITY OF SOILS
	2011-10-01
卷号	47期号:7页码:767-775
关键词	Long-term fertilization experiment Plant-available nitrogen Nitrogen pools Nitrogen management index North China Plain
ISSN号	0178-2762
DOI	10.1007/s00374-011-0585-x
通讯作者	Yan, Xiaoyuan(yanxy@issas.ac.cn)
英文摘要	The objective of this study was to evaluate plant-available N pools and the role of N management index (NMI) in the surface (0-20 cm) of a fluvo-aquic soil after 18 years of fertilization treatments under a wheat-maize cropping system in the North China Plain. The experiment included seven treatments: (1) NPK, balanced application of chemical fertilizer NPK; (2) OM, application of organic manure; (3) 1/2OMN, application of half organic manure plus chemical fertilizer NPK; (4) NP, application of chemical fertilizer NP; (5) PK, application of chemical fertilizer PK; (6) NK, application of chemical fertilizer NK; and (7) CK, unfertilized control. Total organic N (TON), microbial biomass N (MBN), labile N (LN), inorganic N (ION, including ammonium (NH (4) (+) )-N and nitrate (NO (3) (-) )-N) contents, net ammonification rate (NAR), net nitrification rate (NNR), net N mineralization rate (NNMR), and NMI in the fertilized treatments were higher than in the unfertilized treatment. Application of chemical fertilizer N (NPK, NP, and NK) increased ION in soils, compared with application of organic N or control. Nitrate N prevailed over exchangeable NH (4) (+) -N in all treatments. Nitrogen storage of the OM- and 1/2OMN-treated soils increased by 50.0% and 24.3%, respectively, over the NPK-treated soil, which had 5.4-22.5% more N than NP-, PK-, and NK-treated soils. The MBN, LN, and ION accounted for 1.7-2.4%, 25.7-34.2%, and 1.4-2.9% of TON, respectively, in different fertilization treatments. The surface soils (0-20-cm layer) in all treatments mineralized 43.6-152.9 kg N ha(-1) year(-1) for crop growth. Microbial biomass N was probably the better predictor of N mineralization, as it was correlated significantly (P < 0.01) with NNMR. The OM and 1/2OMN treatments were not an optimal option for farmers when the crop yield and labor cost were taken into consideration but an optimal option for increasing soil N supply capacity and N sequestration in soil. The NPK treatment showed the highest crop yields and increased soil N fractions through crop residues and exudates input, and thus, it may be considered as a sustainable system in the North China Plain.
收录类别	SCI
WOS关键词	MICROBIAL BIOMASS NITROGEN ; SOIL-NITROGEN ; CROPPING SYSTEMS ; MINERALIZABLE NITROGEN ; NITRIFICATION ; CARBON ; CONVERSION ; FRACTIONS ; GRASSLAND ; FATE
WOS研究方向	Agriculture
WOS类目	Soil Science
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000294798800004
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558975
专题	南京土壤研究所
通讯作者	Yan, Xiaoyuan
作者单位	1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China 2.Sichuan Agr Univ, Sichuan Prov Key Lab Ecol Forestry Engn, Yaan 625014, Peoples R China
推荐引用方式 GB/T 7714	Gong, Wei,Yan, Xiaoyuan,Wang, Jingyan,et al. Long-term applications of chemical and organic fertilizers on plant-available nitrogen pools and nitrogen management index[J]. BIOLOGY AND FERTILITY OF SOILS,2011,47(7):767-775.
APA	Gong, Wei,Yan, Xiaoyuan,Wang, Jingyan,Hu, Tingxing,&Gong, Yuanbo.(2011).Long-term applications of chemical and organic fertilizers on plant-available nitrogen pools and nitrogen management index.BIOLOGY AND FERTILITY OF SOILS,47(7),767-775.
MLA	Gong, Wei,et al."Long-term applications of chemical and organic fertilizers on plant-available nitrogen pools and nitrogen management index".BIOLOGY AND FERTILITY OF SOILS 47.7(2011):767-775.

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