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| 改性尿素N在土壤-烟株系统中的分布规律研究 | |
| 引用本文： | 刘义新,韩移旺,江玉平,于黎莎,王彦亭,陈江华,刘武定.改性尿素N在土壤-烟株系统中的分布规律研究[J].核农学报,2002,16(1):53-57. |
| 作者姓名： | 刘义新 韩移旺 江玉平 于黎莎 王彦亭 陈江华 刘武定 |
| 作者单位： | 1. 中国科技大学经济技术学院,安徽,合肥,230052 2. 中国烟草专卖局(总公司)科教司,北京,100052 3. 中国烟叶生产购销公司生产处,北京,100052 4. 华中农业大学资源环境与农业化学系,湖北,武汉,430070 |
| 摘 要： | 在盆栽烟草条件下采用15N示踪方法研究尿素改性前后N在土壤烟株中的分布规律 ,并比较尿素改性前后N的利用率大小。结果表明 ,尿素改性后比改性前烟叶增产 2 5 1 6% ,达 1 %显著水准。烟株全N量 ,改性后是改性前处理的 1 4 5 7%。从肥料中吸收的N量 ,改性后是改性前处理的 1 2 7 9%。从土壤中吸收的N量 ,改性后是改性前处理的 1 58 3 %。N肥利用率 ,改性后处理为 45 8% ,比改性前处理提高1 0 1个百分点。N的回收率 ,改性后处理达 98 3 % ,比改性前处理提高 1 2 8个百分点。改性尿素省肥增产的主要原因是刺激作物从土壤N库中吸收了较多N素 ,同时所施N肥的利用率有明显提高 |
| 关 键 词： | 改性尿素 氮 土壤烟株中 分布规律 15N示踪 |
| 文章编号： | 1000-8551(2002)01-0053-05 |
| 收稿时间： | 2009-12-31 |
| 修稿时间： | 2001年8月10日 |
STUDY ON DISTRIBUTION LAW OF MODIFIED UREA-N IN SOIL-PLANT SYSTEM |
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| Abstract: | Distribution law of reprocessed urea\|N and urea\|N in soil\|plant system was studied by 15 N\|trace under pot culture condition of tobacco plant. The results showed that reprocessed urea increased the yield of tobacco leaf by 25\^16% compared with urea treatment. As to the amounts of total nitrogen in tobacco plant, the reprocessed urea was 145\^7% of that with the urea treatment. As to the amounts of nitrogen from the fertilizer, reprocessed urea treatment was 27\^9% higher than that of the urea treatment. The nitrogen from soil of the reprocessed urea treatment was 58\^3% more than that of urea treatment. The nitrogen utilization ratio of the reprocessed urea treatment was 10\^1% higher than that of the urea treatment. These results suggest that the reason of the reprocessed urea can increase the yield of tobacco was due to its high fertilizer utilization ratio and nitrogen releasing ratio of the soil. |
| Keywords: | distribution law soil-plant system reprocessed urea-N " target="_blank">15N tracer method zz')" href="#"> 15N tracer method pot culture tobacco plant |
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