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。
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＆lt;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.
出处
《浙江农林大学学报》
CAS
CSCD
北大核心
2013年第2期157-164,共8页
Journal of Zhejiang A&F University
基金
浙江省自然科学基金资助项目(Z5080203
Y5080110)
关键词
土壤肥料学
猪粪
水稻土
有机碳
粒级
热水溶性有机碳
soil fertilizer
pig manure
paddy soil
organic carbon
size fractionation
hot water-soluble organic carbon
