控制水稻分蘖角度对群体生态特性的影响

控制分蘖角度对群体温度、群体相对湿度、群体CO2浓度和光合有效辐射均会产生一定影响。选用2006年水稻有关研究数据，分析水稻分蘖角度对群体生态特征的影响。结果表明：各生育时期群体温度在07:00－19:00处理大于CK。分蘖高峰期到孕穗期CK白天群体相对湿度大于处理，齐穗期到灌浆期处理群体相对湿度大于CK。群体CO2浓度在拔节期和孕穗期均为处理大于CK，其他生育期差异不显著。光合有效辐射垂直分布是处理前期和后期上层截获的光能均小于CK，群体内消光系数小。控制分蘖角度形成了有较高温度、较低湿度、高CO2浓度和适宜光分布的群体，可为获得高产奠定基础。

Effect of controlling tiller angle on population ecological characteristics of rice

Controlling tiller angle will influence temperature,relative humidity,CO2 concentration and photosynthetic active radiation of population.Based on the relative paddy rice data in 2006,the effects of controlling tiller angle on population ecological characteristics were analyzed.The results indicate that population temperature of treatments from 07:00 to 19:00 are higher than that of CK in the different growth periods.The relative humidity of CK is higher than that of treatments from the tiller peak stage to the booting stage in the day,while it is contrary from the full heading stage to the filling stage.CO2 concentrations of the treatments are higher than that of CK at both elongation stage and booting stage,and there are no significant differences in other periods.The upper light intensities of the treatments in vertical distributions of photosynthetic active radiation are larger than that of CK.The extinction coefficient of population is lower.The better group with higher temperature,lower relative humidity,higher CO2 concentration and better light intensity by controlling tiller angle can be formed,which will provide the base for high yield of paddy rice.