Corn plants are highly demanding of nitrogen and the application of silicon has been studied because it minimizes stress from different natures, and for the better utilization of some nutrients by the plants. Thus, the response of the plant to N can be increased by its association with silicon. The present study had the objective to evaluate the dry matter production, accumulation of nitrogen and silicon in the shoots of the plants as well as the physiological variables in corn culture, as a function of nitrogen concentrations in the nutrient solution in the absence and presence of silicon. Treatments consisted of nitrogen concentrations (1.4, 3.6, 7.1, 14.3, and 28.6 mmol L^-1) in the absence and presence (1.8 mmol L^-1) of silicon, silicic acid being used as the silicon source, arranged according to a completely random design with four replications. Corn plants (AG 1051) were cultivated in pots (800 mL). At 10 and 20 days after application of the treatments the dark green color index was examined and 21 days after application of the treatment the nitrate reductase activity, accumulation of N and Si, accumulation of proline and dry matter were evaluated. Significant interactions were observed only for dark green color index. Adding silicon resulted in higher N and Si concentrations in the plant shoots, and higher nitrate reductase activity with resulting higher shoot dry mass production, although it did not influence proline content in corn plant leaves.

玉米植物对氮的需求量很高，因此对硅的应用进行了研究，因为硅可以最大程度地减少不同自然界带来的压力，并使植物更好地利用某些养分。因此，植物对N的反应可以通过其与硅的结合而增加。本研究的目的是评价在不存在和存在氮的条件下，营养液中氮含量的变化，以评价植物芽中干物质的产生，氮和硅的积累以及玉米培养中的生理变量。硅。在不存在和存在下（1.8 mmol L ^-1）的处理包括氮浓度（1.4、3.6、7.1、14.3和28.6 mmol L ^-1）在硅中，硅酸被用作硅源，根据完全随机的设计排列，重复四次。玉米植物（AG 1051）在花盆（800毫升）中种植。施用处理后10和20天，检查深绿色指数，施用处理后21天，评估硝酸盐还原酶活性，N和Si的积累，脯氨酸和干物质的积累。仅对于深绿色指数观察到了显着的相互作用。添加硅导致植物芽中较高的N和Si浓度，以及较高的硝酸盐还原酶活性，从而导致较高的茎干大量生产，尽管这不会影响玉米植物叶片中脯氨酸的含量。