| 徐俊增,彭世彰,丁加丽,张瑞美.控制灌溉的水稻气孔限制值变化规律试验研究[J].水利学报,2006,37(4):486-491 |
| 控制灌溉的水稻气孔限制值变化规律试验研究 |
| Stomata limitation of rice under control irrigation |
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| DOI： |
| 中文关键词: 气孔限制值 水稻 控制灌溉 |
| 英文关键词: stomata limitation rice control irrigation |
| 基金项目: |
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| 中文摘要: |
| 根据国家“863”节水农业重大专项江西示范区的现场试验资料，分析了晚稻叶片气孔限制情况的日变化、全生育期变化规律及其与外界影响因子包括土壤水分和叶气温差的相互关系，分析了控制灌溉条件下水稻气孔限制值对蒸腾速率、净光合速率以及叶片水分利用效率的影响。结果表明：气孔限制值在不同的土壤水分条件下表现出不同的日变化规律，较低的土壤水分导致了较高的气孔限制；全生育期气孔限制值随土壤水分降低而升高，灌水后出现降低；气孔限制值随叶气温差的增加而增加；适度水分控制条件下气孔限制值的增加带来了净光合速率的增加，气孔限制值超过0.2后，净光合速率增加趋势变缓，蒸腾速率出现一定的下降趋势，而叶片水分利用效率持续增加。 |
| 英文摘要: |
| The diurnal variation of stomata limitation and its variation in the whole growth season of rice under control irrigation were analyzed based on field experimental data. Its influences on transpiration rate, net photosynthesis rate and leaf water use efficiency were also analyzed. Relationship between stomat a limitation and environmental factors including soil moisture and leaf_air temperature difference were studied. The results showed that diurnal variation varied with the soil moisture condition and stomata limitation was enlarged under the condition of low soil moisture. The stomata limitation varied with the soil moisture during the growth season and will be reduced after irrigation or raining. Stomata limitation increased with the increase of leaf_air temperature difference and the decrease of soil moisture. Suitable soil moisture regulation gave a rise in net photosynthesis rate. A continuous increase on leaf water use effici
ency was found with the increase of stomata limitation. |
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