| 氮肥形态和用量对藏东南地区烤烟产量和质量的影响 |
| |
| 引用本文： | 李宏文.氮肥形态和用量对藏东南地区烤烟产量和质量的影响[J].生态学杂志,2003,22(1):66-70. |
| |
| 作者姓名： | 李宏文 |
| |
| 作者单位： | 西藏农牧学院, 林芝 860000 |
| |
| 基金项目： | 江苏省生态城市规划研究项目 |
| |
| 摘 要： | 在藏东南地区进行了氮肥用量和形态对烤烟产量与质量影响的田间试验.结果表明,在施N量0～150kg·hm-2范围内,施N量与烘烤后烟叶产量、产值、氧化钾及总N含量呈显著或极显著正相关,与上中等烟比例、还原糖含量则呈显著负相关,糖/碱比显著下降.氮肥用量75kg·hm-2时,产量、质量最佳.无机氮肥对烤烟产量与质量的效应极显著优于有机氮肥.铵态氮、硝态氮、硝铵态氮肥处理间除上中等烟比例,其它各项指标仅略有差异,但均极显著优于酰胺态氮肥.铵态氮对烤烟产量与质量的影响略优于硝态氮,主要在于烟株吸收和同化过程的差异.
|
| 关 键 词： | 烤烟 施N量 氮肥形态 产量 质量 西藏 |
| 文章编号： | 1000-4890(2003)01-0066-03 |
| 收稿时间： | 2000-05-31 |
| 修稿时间： | 2001年6月4日 |
Ecological assessment for City |
| |
| LI Hongwen.Ecological assessment for City[J].Chinese Journal of Ecology,2003,22(1):66-70. |
| |
| Authors: | LI Hongwen |
| |
| Institution: | Tibet Agriculture and Animal Husbandry College, Linzhi 860000, China |
| |
| Abstract: | City is a comprehensive system with three parts:natural,economic and social compornents.The objective of the city is the high efficiency of ecological function and the coordination of ecological relationship.The ecologiazation index is suitable for ecological assessment of the city. This paper is a study on ecological assessment method based on ecological index system,which is applied to Zhangjiagang City.The assessment results are actually coincided with the situation of this city. It established an effective method for ecological assessment and ecological planning for city towns in Eastern China. |
| |
| Keywords: | ecologiazation index system ecological assessment |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《生态学杂志》浏览原始摘要信息 |
| 点击此处可从《生态学杂志》下载免费的PDF全文 |
|
