不同轮作制对农田生态系统中土壤硫攫取与归还途径的研究

应用生态学报 ›› 2003, Vol. ›› Issue (6): 935-940.

不同轮作制对农田生态系统中土壤硫攫取与归还途径的研究

王庆仁, 崔岩山

中国科学院生态环境研究中心, 北京 100085

收稿日期:2000-12-11 修回日期:2001-08-02 出版日期:2003-06-15
通讯作者: 王庆仁,男,1958年生,博士,副研究员,主要从事土壤污染防治与农业环境生态方面的研究,发表论文50余篇.E-mail:grwang@mail.ifas.ufl.edu.
基金资助:
国家自然科学基金资助项目(39870134)

Pathways of soil sulfur input and output in agro-ecosystem under different cropping rotations

WANG Qing ren, CUI Yanshan

Research Center for Eco Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

Received:2000-12-11 Revised:2001-08-02 Online:2003-06-15

摘要/Abstract

摘要： 研究了我国北方地区主要轮作制度下,土壤植物生态系统中硫的主要输入(归还)与输出(攫取)途径.结果表明,在我国北方普遍推行的小麦玉米轮作制中,作物收获物从土壤中攫取的硫素总量为每年26.4kg·hm^-2,由根系和植物其它残留物归还给土壤的硫素为每年6.8kg·hm^-2;在小麦大豆轮作制中,作物收获物从土壤中攫取的硫素总量为每年24.4kg·hm^-2,对土壤的归还量为每年7.2kg·hm^-2;而在玉米油菜轮作制中,收获物从土壤中攫取的硫量为每年45.4kg·hm^-2,归还给土壤的硫量为每年8.7kg·hm^-2;其它作物如棉花、高粱、花生、水稻种植一季通过收获物从土壤中带走的硫量分别为每年7.9、6.4、6.7和18.9kg·hm^-2,对土壤的归还量分别为每年2.6、1.8、4.3和5.6kg·hm^-2.通过对系统主要输入输出通量的估算,几种主要农田生态系统硫盈亏的状况计算结果说明,供试作物皆存在硫亏缺状况:小麦每年6kg·hm^-2、玉米8.5kg·hm^-2、油菜24kg·hm^-2、水稻7.1kg·hm^-2.

Abstract: This paper mainly dealt with the pathways of sulfur (S) input and output in agro ecosystems under general cropping rotations in northern China. The results indicated that in a typical corn wheat rotation system,Soutput by the crop products was 26.4 kg穐m^-2,and 6.8 kg穐m^-2 of Swas returned to the soil through root and plant residues. Under wheat soybean rotation,24.4 kg穐m^-2 of Swas removed from and 7.2 kg穐m^-2 of Swere returned to the soil. Under the rotation of corn with rape,up to 45.4 kg穐m² was taken out from and only 8.7 kg穐m^-2 returned to the soil,respectively. 7.9,6.4,6.7 and 18.9 kg穐m^-2 of Soutput by products and 2.6, 1.8, 4.3 and 5.6 kg穐m^-2 of Sinput by residues were obtained in cotton,sorghum,peanuts and paddy rice,respectively. Through estimation of Sbalance for these systems,6,8.5,24 and 7.1 kg穐m^-2 穣r^-1 of Swas lost from soil by growing wheat,corn,rape and paddy rice,respectively.

中图分类号:

S512.1

王庆仁, 崔岩山. 不同轮作制对农田生态系统中土壤硫攫取与归还途径的研究[J]. 应用生态学报, 2003, (6): 935-940.

WANG Qing ren, CUI Yanshan . Pathways of soil sulfur input and output in agro-ecosystem under different cropping rotations[J]. Chinese Journal of Applied Ecology, 2003, (6): 935-940.

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