| 张秋平,杨晓光,杨 婕,王化琪,王璞,王志敏,Bouman.不同灌溉处理下旱稻光合生理特征及水分利用效率[J].干旱地区农业研究,2005,(6):67~72 |
| 不同灌溉处理下旱稻光合生理特征及水分利用效率 |
| Photosynthesis characteristics and water use efficiency of aerobic rice under different irrigation treatments |
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| DOI：10.7606/j.issn.1000-7601.2005.06.14 |
| 中文关键词: 旱稻 灌溉 光合速率 蒸腾速率 水分利用效率 |
| 英文关键词:aerobic rice irrigation photosynthesis rate transpiration rate water use efficiency |
| 基金项目:国际合作项目(CAU-IRRI)； “863”重大专项(2002AA2Z4021) |
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| 中文摘要: |
| 在中国农业大学昌平实验站定点定位测定了充分灌溉、前期胁迫后期充分灌溉、前期充灌后期胁迫、全生育期胁迫4种灌溉处理下旱稻品种HD 297不同生育期内光合蒸腾等农田生理生态特征。结果表明:旱稻的光合速率日变化规律为,在旱稻生长前期,日变化曲线呈现“双峰”趋势,在作物生长后期,曲线呈现“单峰”变化趋势;旱稻的蒸腾速率日变化规律则在全生育期内均呈现“单峰”变化趋势,与温度日变化规律一致;旱稻的水分利用效率日变化规律呈“L”型,6∶00最高,随后急剧下降,到18∶00达到最低值。不同的灌溉处理只影响作物光合、蒸腾和水分利用效率值的大小,不改变其变化趋势。在4个灌溉处理中,前期胁迫后期充分灌水的处理产量水平的水分利用效率最高。 |
| 英文摘要: |
| The field experiment was carried out at the Changping Experimental Station of China Agricultural University to probe into the physiological and ecological characteristics(photosynthesis and transpiration) of aerobic rice under different irrigation treatments.Making use of Licor-6400 photosynthesis measure system,the photosynthesis,transpiration and stomata conductivity were measured in every two hours from 6∶00 to 18∶00.The results showed: the diurnal variation of photosynthesis rate of aerobic rice presented "double peaks" curve at earlier development period,but showed "sole peak" curve at later period(filling stage);the diurnal variation of transpiration rate presented "sole peak" curve during the whole growth period,being consistent to air temperature change;the diurnal variation of water use efficiency took on "L" shape,namely,the maximum value appeared at 6∶00,and subsequently the value sharply descended to the minimum until 18∶00.Irrigation treatments only affected the magnitude of photosynthesis,transpiration and water use efficiency,but didn't affect the variation trend.In the 4 irrigation treatments,the water use efficiency of W2 with drought stress during earlier period and sufficient water during later period was the highest. |
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