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摘要: 基于持续10 a的浙江省平湖地区水稻土长期定位试验，研究了长期施肥下水稻土剖面总有机碳（TOC），各粒级有机碳和热水溶性有机碳（HWOC）分布特征，阐明施猪粪影响下土壤有机碳的积累和演化规律。结果表明：①在0～45 cm土层，施猪粪地块土壤总有机碳显著高于对照，且随土层深度的增加，施有机肥使土壤有机碳质量分数提高的幅度越大；②总有机碳和砂粒碳、粉粒碳之间呈显著的正相关性关系（P＜0.05），且受土壤粉粒和黏粒对有机碳物理保护容量控制，0～45 cm土层土壤有机碳以砂粒碳为主，45～85 cm土层则以粉粒碳和黏粒碳为主；③施猪粪可提高土壤热水溶性有机碳。图2表4参28Abstract: To improve paddy soil fertility，the effects of fertilization on the distribution of total organic carbon along with fractionation and hot water-solubility in paddy field soil profiles were studied. This work included accumulation of soil organic carbon and its soil profile evolution from a 10-year fertilization experiment with pig manure amendments in Pinghu County，Zhejiang Province. Results showed that in the 0－45 cm horizon soil organic carbon content differed greatly between pig manure treatments and no pig manure amendments. With organic fertilizer amendments，soil organic carbon increased with the increase of soil profile. Total organic carbon differed greatly from sandy carbon and amylaceous carbon （P＜0.05）. Soil organic carbon in the 0－45 cm horizon consisted mainly of sandy carbon；whereas in the 45－85 cm horizon it was comprised mainly of amylaceous carbon and sticky carbon. Also，with the pig manure amendments，hot water-soluble organic carbon content of the soil increased.［Ch，2 fig. 4 tab. 28 ref.］
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Key words:
- soil fertilizer /
- pig manure /
- paddy soil /
- organic carbon /
- size fractionation /
- hot water-soluble organic carbon
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链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2013.02.001
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