摘要
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。
By means of using sand cuture, soil culture as well as tracer isotopes method, it was found that the mixed nitrate rare-earth regulated markedly the potassium nutritional state in rape and also improved its absorption of potassium. Under potassium-deficient condition, the effect was more evident. Because of application of mixed nitrate rare-earth, rape growth was promoted and the output of rapeseed was enhanced. The mixed nitrate rare-earth, however, only regulated the potassium nutritional state of plant and can not replace the potassium.
关键词
油菜
钾营养
施肥
稀土
rare-earth element
potassium
tracer isotopes method
rape
plant nutrition
