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模拟不同地区、地形水资源状况的多样性,设置4个不同的水分灌溉处理,研究不同水分管理模式对水稻生长及光合特性的影响。结果如下:天灌水稻受到干旱胁迫。天灌水稻分蘖少且成穗率低,叶片短而窄,比叶面积小,叶面积指数低,光合速率低,产量低下。湿灌可基本维持水稻的正常生长。湿灌水稻的成穗率较高,叶片较大,光合速率较高,有较高的产量水平。淹灌不利于水稻生长。淹灌水稻根系活力较低,叶片披垂率较高,光合速率低于湿灌。配灌水稻的叶片长而宽,叶面积指数高,光合速率最高,产量最高。荧光诱导结果表明天灌处理和湿灌处理的水稻热耗散较高,而配灌处理和淹灌处理的水稻是通过发出更多的荧光来释放过量的光能。
To simulate the diversity of water resources in different regions and terrains, four different irrigation treatments were set up to study the effects of different water management practices on the growth and photosynthetic characteristics of rice. The results are as follows: Day Irrigated rice is subject to drought stress. The days irrigated rice had less tillers and lower ear percentage, shorter and narrower leaves, smaller specific leaf area, lower leaf area index, lower photosynthetic rate and lower yield. Wet irrigation can basically maintain the normal growth of rice. Wet irrigation rice has higher spike rate, larger leaves, higher photosynthetic rate and higher yield. Flooding is not good for rice growth. Under flooded irrigation, the root activity of rice was lower, the rate of leaf plucking was higher and the photosynthetic rate was lower than that of wet irrigation. Paddy rice with long and wide leaves, leaf area index, the highest photosynthetic rate, the highest yield. Fluorescence-induced results showed that heat-dissipation rate of rice under day irrigation and wet-filling was higher, while rice with irrigation and flooding treatments released more light through more fluorescence.