摘要
对乌鲁木齐市周边稻田土壤不同季节、不同剖面的全硫和有效硫以及植物的全硫含量进行测定和分析，结果表明该供试土壤全硫含量在196.71～165.77mm/kg有效硫含量在121.83～5542.01mg/kg,妇均具有明显的季节变化趋势且沿着剖面由上到下逐渐降低，植物根中全硫含量在1880.522～3395.99mg/kg,随植物的生长节律呈被动性变化地上茎叶部分的含量在685.83～3079.69mg/kg，在生长季内单调下降，根中全硫含量高于地上茎叶部分说明根是硫的重要储库，相关性分析表明土壤是植物体中硫的重要来源，对系统主要输入输出通量的估算结果为水稻作物从土壤中攫取的硫素总量每年大约为6.78kg/hm^2。
The distribution characteristics and seasonal dynamics of sulfur in the paddy soil-plant system in the field surrounding Ururriqi were measured and analyzed. The results showed that the total sulfur contents of tested soil ranged from 196.71 to 1 658.77 mg/kg,while the availahle sulfur contents ranged from 121.83 to 542.01 mg/kg. The concentration of sulfur generally decreased with soil depths. The contents of total and a vailahle sulfur both had obvious seasonal dynamic trends. The total sulfur contents in roots ranged from 1 880.52 to 3395.99 mg/kg. The changes of the total sulfur contents in roots were fluctuant , which were correlated with the growth process of plants. The total sulfur contents in aboveground organs of stern and leaf parts varied from 685.83 to 3079.69 mg/kg.which were declined straightly with the growth process of the plants. The total sulfur contents in roots were higher than those in the stern and leaf parts of a hoveground , indicating t ha t the roots were the important sulfur pools. The curvilinear correlation het ween sulfur contents in crops and soil was significant .which indicated that soil was a great amount of sulfur pool for plant. Through estimation of sulfur balance for this system , sulfur output by the annual paddy crop products was about 6.78 kg/hm^2.
出处
《新疆农业大学学报》
CAS
2013年第6期498-503,共6页
Journal of Xinjiang Agricultural University
基金
国家自然科学基金项目(41263004)
作者简介
通讯作者：景伟文，E-mail：479218061@qq.com
