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本试验通过砂培,土培及同位素示踪等方法证明油菜喷施硝酸混合稀土后对油菜钾的营养状况有明显的调节作用。试验结果表明,硝酸混合稀土可以促进油菜对钾的吸收。在缺钾条件下这种促进作用更为明显。由于硝酸混合稀土改善了油菜钾的营养状况,因而促进了油菜的生长,提高油菜籽的产量。试验结果同时也指出,硝酸混合稀土对油菜的钾营养起的仅是一种调节作用,而不能代替钾的营养作用。
In this experiment, sand culture, soil culture and isotope tracing methods were used to prove that the rapeseed nitrate could significantly regulate the nutritional status of rapeseed after spraying nitric acid mixed rare earth. The experimental results show that nitric acid mixed rare earth can promote rapeseed potassium absorption. Under the condition of potassium deficiency, this promoting effect is more obvious. Nitric acid mixed rare earth rape potassium to improve the nutritional status, thus promoting the growth of rapeseed, rapeseed production increased. The test results also pointed out that nitric acid mixed rare earth rape potassium nutrition is only a regulatory role, but can not replace the nutritional role of potassium.