宁夏稻作区水分胁迫对水稻分蘖动态及产量的影响

Effects of Water Stress on Tillering Dynamics and Yield of Paddy Rice in Ningxia

研究了不同灌溉方式对水稻分蘖能力及产量的影响。结果表明,灌溉条件越好,水稻分蘖能力越强,收获穗数越多,产量越高;全生育期间歇灌溉和胁迫灌溉对水稻分蘖能力以及产量均有较大影响。在宁夏水资源紧缺的条件下,应通过调整种植业结构、增加轮作面积、延长轮作周期等措施压减控制水稻种植面积,保证有限的水资源能够充分灌溉一定面积的水稻,并通过完善改进水利设施,达到减少渗漏浪费、提高水资源利用效率的目的。

A field experiment was carried out to explore the effects of different irrigation method on tillering ability and yield of rice. The results showed that the better irrigation conditions would gain more tillerings and effective panicles and higher yields of flee. During the whole growth period, intermit.tent irrigation and stress irrigation had great effects on tillering ability and yield of rice. Under the condition of the shortage of water resources in Ningxia, the rice planting area should be controlled to ensure the limited water resources could be fully used by adjusting the planting structure, increasing the rotation area and prolonging the rotation cycle. In addition, improving the water conservancy facilities is also a better way to reduce the leakage and improve the utilization efficiency of water resources.