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本试验应用饱和D—最优设计,研究了稀土、磷肥对红豆草、老芒麦和苦苕子的生理效应及综合效应。结果表明:豆科牧草施用稀土不仅可提高牧草干物质累积量、种子产量,而且对增加牧草粗蛋白、粗脂肪含量,改善牧草品质均有良好作用。施用磷肥也提高了豆科牧草的干物质累积量和种子产量,但对牧草品质影响不大。适宜的稀土、磷肥比,对提高产量有协同作用;红豆草适宜的肥料配比是低稀土低磷;苦苕子是高稀土中磷。禾本科牧草老芒麦施用稀土后,干物质累积量、种子产量均有所下降,但对改善牧草品质有良好作用。老芒麦施磷后干物质累积量增加,施磷对老芒麦品质影响不大。~(141)Ce 示踪表明:~(141)CeCl_3涂抹叶片后,~(141)Ce 首先向生长旺盛部位运输,然后向植株其它部位转移;稀土元素~(141)Ce 在体内运输速度从涂抹叶片运输到全株需8～11天。
In this experiment, the saturated-D-optimal design was used to study the physiological effects and comprehensive effects of rare earth and phosphate on safflower, The results showed that the application of rare earths to leguminous herbage could not only increase dry matter accumulation and seed yield of forage grass, but also play a good role in increasing pasture crude protein and crude fat content and improving forage quality. Application of phosphate fertilizer also increased the accumulation of dry matter and seed yield of legumes, but had little effect on pasture quality. Appropriate rare earth, phosphate fertilizer ratio, to enhance the yield of synergies; suitable fertilizer ratio of red grass is low RAPD; bitter ramen is high RE in phosphorus. After the rare earth was used in gramineous pasture, the accumulation of dry matter and seed yield decreased, but it had a good effect on the improvement of pasture quality. The dry matter accumulation of Phragmites australis increased after phosphorus application, and phosphorus application had little effect on the quality of Emerald. The ~ (141) Ce tracer indicated that ~ (141) Ce was first transported to the growth site and then to other parts of the plant after ~ (141) CeCl_3 leaf application. The transport speed of REE from (141) Leaf transport to the whole plant takes 8 to 11 days.