温室立体育秧条件下杂交稻秧苗素质的试验研究

Experimental Investigations on Seedling Quality of Hybrid Rice Under the Condition of Stereoscopic Seedling Raising in Greenhouse

为探索温室立体育秧条件下杂交稻秧苗素质的影响因素及其作用,采用L9(34)正交试验分析了杂交稻的秧层、补光时长、品种和播种量4个因素对杂交稻秧苗素质的影响。研究结果表明:对于壮苗指数,因素影响的主次顺序是补光时长>播种量>品种>秧层。对于温室立体秧架第2、3层,采用2 500lx的光照强度,夜间补光时长分别为4、3h,第1层(底层)应采用3 000lx的光照度,夜间补光时长为5h,可保证杂交稻在低播量条件下的秧苗素质,满足机插技术的要求。

Factory stereoscopic rice seedling nursing is the important way to save lands and cultivate seedlings for mechanization planting. In order to explore the influencing factors and their effects on hybrid rice seedling quality under the condition of greenhouse stereoscopic seedling,the influence of hybrid rice varieties,sowing rate,seedling layer and fill lighting time on seedling quality of hybrid rice has been analyzed by L9（ 34） orthogonal test. The experiment results showed that the order of influence factors on the healthy index was： fill lighting timesowing ratevarieties of riceseedling layer. For greenhouse stereoscopic seedlings,the second and the three layers required respectively the fill lighting time of 4hours and 3 hours under the light intensity of 2 500 lx. The first layer should use the light intensity of 3 000 lx and the fill lighting time of 5 hours,so as to ensure that the seedling quality of hybrid rice under in low sowing rate can meet the requirements of machine transplanting technology.