摘要
为湘南地区晚稻节水栽培提供实践依据,2009年在湖南永州设置了不同蓄水深度对水稻生长发育影响试验。结果表明,与常规灌溉方式相比,前期深蓄水、中后期湿润灌溉延迟水稻生育期4~5 d;光合速率降低,蒸腾速率增大,剑叶叶绿素含量降低;有效分蘖数减少,有效穗数、结实率以及千粒重下降,从而降低了水稻产量;节省了灌溉用水量,灌溉水利用效率提高。因此,在湘南地区采用这种方式有利于扩大晚稻种植面积,确保晚稻稳产。
To provide the practice basis for the saving-water cultivation of late rice in southern Hunan Province,the experiment of effect of different water storage depth on rice growth and development was conducted.The results showed that deep irrigation at transplanting stage and wetting irrigation at middle and late stages（DIII） of rice extended rice growth stage about 4-5 days,reduced the photosynthetic rate and the chlorophyll content,increased the transpiration rate.At the same time,the effective panicles,seed setting and 1000-grain weight was decreased.Therefore,the rice yield was reduced comparing to conventional irrigation.However,DIII saved the irrigation water and improved the efficiency of irrigation water.So,DIII was advantageous to extend the area of late rice and stabilize the rice yield in southern Hunan Province.
出处
《作物研究》
2010年第3期149-151,154,共4页
Crop Research
基金
"十一五"国家粮食丰产科技工程项目(2006BAD02A01)
湖南省教育厅项目(09C498)
关键词
水稻
灌溉
光合速率
产量
Rice
Irrigation
Photosynthetic rate
Yield
