Changes in organic carbon content and its physical and chemical distribution in paddy soils cultivated under different fertilisation practices
文献类型: 外文期刊
第一作者: Wei, Zongqiang
作者: Wei, Zongqiang;Yan, Xiao;Ji, Jianhua;Li, Zhi
作者机构:
关键词: Amorphous Fe and Al;Chemical protection;Paddy soil;Particle size fractions;Soil carbon stabilisation
期刊名称:JOURNAL OF SOILS AND SEDIMENTS ( 影响因子:3.308; 五年影响因子:3.586 )
ISSN:
年卷期:
页码:
收录情况: SCI
摘要: Purpose Chemical protection facilitates soil organic carbon (SOC) sequestration and stabilisation due to a strong chemical binding with mineral surfaces and metal ions (e.g. iron [Fe], aluminium [Al] and calcium [Ca]). However, there is not much information regarding the role of chemical protection in SOC stabilisation in paddy soils, particularly in terms of the specific forms of organo-mineral complexes such as Fe-, Al- and Ca-bonded OC. Materials and methods We sampled paddy soils at the 0-20 cm soil layer from a long-term field experiment (initiated in 1981) conducted under humid subtropical conditions in China, which has five fertilisation treatments (i.e. control treatment without fertiliser [CK], chemical fertiliser only [CF], green manure [GM], Straw and Manure) with equivalent nutrient inputs (i.e. N, P2O5 and K2O at the rates of 135-67.5-135 kg ha(-1), respectively, for both early and late rice) except CK. We determined the chemical binding forms of SOC and the associated soil properties in the particulate fraction (PF, > 53 mu m) and the mineral-associated fraction (MAF, < 53 mu m), which were obtained using a low-energy ultrasonic dispersion procedure, of a paddy soil in the long-term fertilisation experiment.
分类号: X
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