湖南稻田土壤固定态铵含量的季节变化及生物有效性

应用生态学报 ›› 2003, Vol. ›› Issue (10): 1665-1668.

湖南稻田土壤固定态铵含量的季节变化及生物有效性

廖继佩¹, 李法云², 张杨珠¹, 冯跃华¹, 黄运湘¹

1. 湖南农业大学资源环境学院, 长沙 410128;
2. 辽宁大学环境与生命科学院, 沈阳 110036

收稿日期:2001-05-16 修回日期:2001-08-09
通讯作者: 张杨珠
基金资助:
国家“九五”重中之重科学技术攻关项目(95-001-01-03);湖南省教育厅科学基金资助项目

Seasonal variation of fixed ammonium content of paddy soils in Hunan Province and its bioavailability

LIAO Jipei¹, Li Fayun², ZHANG Yangzhu¹, FENG Yuehua¹, HUANG Yunxiang ¹

1. College of Resource and Environment Sciences, Hunan Agricultural University, Changsha 410128, China;
2. College of Enivironmental and Life Science, Liaoning University, Shengyang 110036, China

Received:2001-05-16 Revised:2001-08-09

摘要/Abstract

摘要： 以湖南省3种固定态铵含量较高的稻田土壤为供试土壤,通过盆栽试验,研究了稻田土壤固定态铵在植稻期间的动态变化及其生物有效性.结果表明,稻田土壤的固定态铵含量处于不断的变化之中,施氮肥和有机肥使土壤固定态铵含量升高,而水稻吸收氮则使土壤固定态铵含量降低,其变化趋势与土壤碱解氮含量变化相似.“新固定的”固定态铵基本对当季水稻全部有效,而“原有的”固定态铵对当季作物和后季作物部分有效.就供试土壤而言,在水稻生育期间,土壤固定态铵的释放量是潮沙泥>紫泥田>河沙泥;就不同水稻而言,早稻生育期间土壤固定态铵的释放量大于晚稻生育期间土壤固定态铵的释放量.

关键词: 水稻土, 固定态铵, 季节变化, 生物有效性, 湖南

Abstract: Three paddy soils with higher content of fixed ammonium in Hunan Province were used as test soils in pot experiment to study the seasonal variation of their fixed ammonium content and its bioavailability during rice growth period.The results showed that the fixed ammonium content in the paddy soils changed constantly during rice growth.Applying Nfertilizer and organic manure increased the fixed ammonium content, which was decreased through the Nuptake by rice plants.The recently fixed ammonium was almost fully available to rice, while the native fixed ammonium was partly available.The release of fixed ammonium during rice growth was newly alluvial sandy soil > purple clayey soil> alluvial sandy soil, and was greater at early growth stage than at later growth stage.

Key words: Paddy soil, Fixed ammonium, Seasonal variation, Bioavailability, Hunan Province

中图分类号:

S153.6+1

廖继佩, 李法云, 张杨珠, 冯跃华, 黄运湘. 湖南稻田土壤固定态铵含量的季节变化及生物有效性[J]. 应用生态学报, 2003, (10): 1665-1668.

LIAO Jipei, Li Fayun, ZHANG Yangzhu, FENG Yuehua, HUANG Yunxiang . Seasonal variation of fixed ammonium content of paddy soils in Hunan Province and its bioavailability[J]. Chinese Journal of Applied Ecology, 2003, (10): 1665-1668.

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