| 摘要: |
| 初步研究认为,农林复合系统(以下简称系统)同单一的农业系统相比,作物层附近白天 CO2浓度略有减少,这种差异主要出现在10～13时。在系统内,由于农林结构与配置不同,CO2浓度在空间分布上也不均匀,无论系统内或外,CO2垂直通量白天多表现为向下,早、晚则相反。从平均情况看,系统内 CO2通量稍大于旷野农田。尽管系统内有上述 CO_2浓度的变化,但系统内作物光合强度仍高于旷野农田。 |
| 关键词: 农林复合系统 CO2浓度 CO2垂直通量 |
| DOI： |
| 投稿时间：1993-02-08 |
| 基金项目:国家自然科学基金项目 |
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| Study on the Actual Evapotranspiration and Its Potential Evapotranpiration in the Field within the Composite System of Agriculture and Forestry |
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| Abstract: |
| This article discussed some characteristics of crop transpiration,actual evapotranspiration and potential evapotranspiration in the composite system of agriculture and forestry by applying the mi- crometeorological method and pointed out that the actual evapotranspiration of wheat in the forest shelter- belt networks and in the intereropping field of Pear and wheat within the system were 5.3% and 14.9% smaller than that in the open wide field respectively,those of potential evapotranspiration were 3.8% and ... |
| Key words: composite system of agriculture and forestry carbon dioxide concentration vertical flux of carbon dioxide |
