摘要
玉米早49×多黄8的种子分别以0、2、5、10、40和100ppm 含80%La 和 Ce 的混合稀土溶液浸泡24小时。幼苗生长于 Hoagland 培养液,辅以人工光照和溶液通气。移栽两周后收获。测定株高、根长、植株叶面积、地上与地下部鲜重和干重以及植株各部分 La、Ce、Ca、Zn、Cu、Mn、Mo 的含量。结果表明,植株中稀土元素含量随处理的稀土浓度增加而增加。植株中 La 和Ce 的含量及 Ce/La 比值均高于培养液中的值,说明玉米幼苗对 La、Ce 的吸收具主动性和选择性。在本实验条件下,2—5ppm 稀土溶液的处理,对幼苗生长有促进作用。逐步回归分析也指出,La 和 Ce 是所测元素中影响植株生长的主要因素。从元素含量分析的结果中还看到 La、Ce为 Ca 的正相关。
The seeds of maize hybrid Zao 49×Dohuang 8 were soaked in solutions with 0,2(5),10,40 and 100 ppm of rare earth oxide containing 80% of La and Ce for 24hours.The seedlngs were grown in Hoagland's nutrient solution with aeration underadditional illumination and harvested at the age of two weeks after transplanting.Plant height,root length,leaf area of single plant,the fresh weight and dry weightof shoot and root and the content of La,Ce,Ca,Zn,Cu,Mn and Mo in shoot androot of single plant were measured.The data indicated that the rare earth elementsabsorbed into seeds and seedlings increased with the increment of rare earth concentration in the experimental treatments,La and Ce contents and the ratio of Ce/La werehigher in seedlings than in the cultural solution,showing an active and selectiveabsorption of rare earth metals in maize.Seedling growth was promoted by the treatments of 2-5 ppm of rare earth solutions under the experimental condition.The element contents in plant showed a significant positive correlation between La,Ce andCa.Step regression analysis suggested that among the elements studied,La and Cewere the main factors affecting plant growth.
出处
《作物学报》
CAS
CSCD
北大核心
1990年第4期305-310,共6页
Acta Agronomica Sinica
