有机物循环对红壤稻田土壤N矿化的影响

生态学杂志 ›› 2004, Vol. ›› Issue (1): 39-43.

有机物循环对红壤稻田土壤N矿化的影响

周卫军, 王凯荣, 刘鑫

中国科学院亚热带农业生态研究所, 长沙, 410125

收稿日期:2002-04-28 修回日期:2002-11-02 出版日期:2004-02-10
通讯作者: 周卫军,男,1966年生,副研究员,博士,主要研究方向为农业生态系统物质循环与转化.
基金资助:
中国科学院知识创新工程项目(KZCX2-407)资助

Effects of organic residue cycling on soil nitrogen mineralization characteristics of rice cropping system in red soil region of China

ZHOU Weijun, WANG Kairong, LIU Xin

Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China

Received:2002-04-28 Revised:2002-11-02 Online:2004-02-10

摘要/Abstract

摘要： 采用间歇淋洗培养方法,以长期定位试验—不同施肥制度对红壤稻田系统生产力及其土壤环境影响的土壤为研究对象,应用一级动力学方程,求得土壤N矿化参数,并探讨长期采用有机物循环对土壤有机质、活性有机质和易氧化有机质的影响,以及它们与N₀之间的关系。结果表明,长期采用有机物循环可以显著地提高稻田系统土壤N的矿化势(N₀),具有明显的季节性变化特征;K值则具有与N₀相反的顺序,N₀越大则K值越小,K值的变化范围在0.0233～0.0799周^-1之间;有机物循环可以提高土壤有机质的含量,改善有机质的品质,增强有机质的活性;N₀、有机质、活性有机质和易氧化有机质的相关分析表明,各指标之间均达到显著或极显著相关水平。

关键词: 杉木间伐材, 压缩密化, 物理力学性能, 微观结构

Abstract: The experiment of the effects of fertilization on productivity and soil environment was studied using leaching incubation at intervals. The soil Nmineralization parameter was obtained with the first order dynamic equation. The effects of long-term organic residue cycling on soil organic matter (SOM), active organic matter (AOM), readily oxidizable organic matter (ROM) and the relationships among N₀, SOM, AOM, ROMwere discussed. The results showed that N₀ increased significantly under organic residue cycling of rice cropping system in red soil area of China. Obviously seasonal change characteristics of N₀ could be observed. However, the parameter Kwas opposite to N₀. The more N₀ was, the smaller Kwas. Kvaried from 0.0233 to 0.0799 week^-1. It could increase the content of SOM, improve the quality of SOM, and enhance its activities after organic residue cycling in the rice cropping of red soil area of China. Significant correlations among N₀, and SOM, AOM, ROM was observed.

Key words: Chinese fir thinning wood, Compression, Physical-mechanical quality, Microstructure

中图分类号:

S153.6

周卫军, 王凯荣, 刘鑫. 有机物循环对红壤稻田土壤N矿化的影响[J]. 生态学杂志, 2004, (1): 39-43.

ZHOU Weijun, WANG Kairong, LIU Xin . Effects of organic residue cycling on soil nitrogen mineralization characteristics of rice cropping system in red soil region of China[J]. cje, 2004, (1): 39-43.

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