【摘要】 为了明确开放式空气CO2浓度增高(FACE)对水稻茎蘖消长的影响,借助目前我国惟一的FACE技术平台,通过不同的N肥处理,对FACE条件下水稻茎蘖消长的动态进行了模拟研究并建立了相应的模型。该模型由茎蘖增长动态和茎蘖消亡动态两部分组成,以时间为驱动因子,描述了水稻茎蘖数随移栽后天数的动态变化过程,对常规及CO2浓度增加条件下水稻茎蘖的变化均有很好的拟合性。通过相关试验数据对模型的检验,结果表明模型的拟合程度高,具有很好的适用性。更多还原

【Abstract】 Global atmospheric CO2 concentrations were projected to reach levels 650~780 μmol·mol-1 at the end of 20th century.The increase in atmospheric can enhance the growth and development of rice potentially.However,little is known about the effect of free-air CO2 enrichment(FACE) on tiller dynamic of rice.A FACE experiment was conducted at Anzhen,Wuxi,Jiangsu Province in 2001~2003,using the Japonica cultivar Wuxiangjing 14.The target CO2 concentration of the FACE plots was 200 μmol·mol-1 above that in the ambient air,and three levels of N were supplied: LN(150 kg·hm-2),MN(250 kg·hm-2) and HN(350 kg·hm-2).The simulation models of rice tillers dynamic with FACE were developed,in which the changeable process of tiller numbers were described with day times after transplanting and the tiller numbers were fitted well in normal condition and free air CO2 enrichment.Through testing with related experimental data,the models had high fitting degree and applicability.更多还原