| 稻田温室气体排放的时空差异性与精准施肥 |
| |
| 引用本文： | 鲁春霞、吕耀.稻田温室气体排放的时空差异性与精准施肥[J].资源科学,2002,24(6):86-90. |
| |
| 作者姓名： | 鲁春霞、吕耀 |
| |
| 作者单位： | 中国科学院地理科学与资源研究所,北京,100101 |
| |
| 基金项目： | 中国科学院知识创新工程“精准种植研究—上海精准种植技术集成示范”(K2CX2— 412 )资助 |
| |
| 摘 要： | 文中试图以不同施氮处理下稻田温室气体排放的时空差异性为依据 ,为精准施肥提供环境方面的信息。通过实验观测 ,研究了不同施氮处理条件下 ,稻田温室气体CH4和N2 O日排放的差异性。施氮量不同的小区 ,CH4排放强度有很大差异 ,最大差值为 1 5 8mg·m- 2 h- 1 ,CH4排放强度随着施氮量的增加而减少 (R =0 88)。甲烷排放的日变化幅度也较大 ,在 1～ 6 6倍左右。在不同施氮水平下 ,N2 O则随着施氮量的增加 ,排放通量逐渐减少。如果以观测的温室气体排放强度变化为基础 ,同时考虑粮食产量的变化规律 ,施氮量为 2 70kg·hm- 2 时 ,温室气体排放量较低。实际上 ,精准施肥需要考虑诸多因素如土壤的理化性质、水稻不同生长季节的养分需求等等
|
| 关 键 词： | 温室气体排放 精准施肥 稻田 |
| 文章编号： | 1007-7588(2002)06-0086-05 |
| 修稿时间： | 2002年6月10日 |
DIFFERENT CHARACTERISTICS OF GREENHOUSE GAS EMISSION FROM RICE PADDY FIELD AND PRECISION FERTILIZATION |
| |
| Abstract: | Main concern of this paper is devoted to exploring the relationship between different characteristics of greenhouse gas emission from rice paddy field and precision fertilization. The field experiment results showed that CH 4 and N 2O emission flux differed significantly by different fertilization treatment( 0kg N.hm -2, 90kg N.hm -2, 180kg N.hm -2, 270kg N.hm -2, 360kg N.hm -2). The methane emission flux in different treatment plot had obviously difference and the maximum gap reached 15.8mg.m -2hr -1. In general, methane emission rate decreased with the increase of nitrogen fertilizer volume (R=0.88). The methane emission flux in a day changed from 1 to 6.6 times. N 2O emission flux decreases with the growth of fertilization volume. Based on different characters of greenhouse gas emission from rice paddy field, taking grain yield into consideration, it will provide a threshold for nitrogen fertilizing amount, the fitting fertilization volume was 270kg hm -2. To present precision fertilization, it is no doubt that many factors, such as physical and chemical feature and nutrient demand of rice plant and so on, should be taken into account. Therefore, the research of different characteristics of greenhouse gas emission from paddy field is expected to provide environmental information for precision fertilization. |
| |
| Keywords: | Greenhouse gas emission Precision fertilization Paddy field |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《资源科学》浏览原始摘要信息 |
| 点击此处可从《资源科学》下载免费的PDF全文 |
|
