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大白菜施用稀土增产效果达极显著水平,平均增产13.6%。主要原因是促进了根系发育,增加了根重和侧根数,扩大了根系垂直方向和水平方向的分布范围,为养分和水分的吸收和运转奠定了良好的基础,从而促进了大白菜地上部分的生长,增加了叶片数和叶面积。其主要机理是稀土提高了叶片中叶绿素的含量和酶的活性,从而增加了有机物质的合成;增强了对营养元素的吸收;增强了抗逆性,降低了发病率。
Chinese cabbage application of rare earth yield increase reached a significant level, an average increase of 13.6%. The main reason is to promote root development, increase the root weight and lateral root number, expand the root vertical and horizontal distribution of the range, for the absorption and operation of nutrients and water laid a good foundation, thus contributing to the aerial parts of Chinese cabbage Growth, increased leaf number and leaf area. The main mechanism is that rare earth increases the chlorophyll content and enzyme activity in the leaves, thereby increasing the synthesis of organic substances, enhancing the absorption of nutrient elements, enhancing the resistance and reducing the incidence.