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稀土元素从镧到镥(La—Lu,原子序数57—71)是元素周期表ⅢB族成员。它们在植物中的分布和作用国外很早就有研究,1878年Cossa就报道了(木菊)材、烟草、葡萄等植物中含有少量稀土。我国对稀土的研究起步较晚,农业方面的应用有十几年的历史,在小麦、水稻、苹果等主要作物上使用一般可增产8—10％、林业方面的应用只有几年的历史,稀土可以促进插条生根及苗木生长。但对于稀土在树木种子产量和品质方面的作用报道尚不多见,于是我们选择了适宜室内杂交的杨树为材料,利用稀土元素处理杨树切枝母本,对其杂交种子的数量和品质进行了初步研究。
The rare earth elements from La to Lu (atomic number 57-71) are members of Group IIIB of the Periodic Table. Their distribution and role in plants have long been studied abroad. In 1878, Cossa reported that (wood chrysanthemum) wood, tobacco, grapes and other plants contain a small amount of rare earths. Rare earth research in China started late, and agriculture has a history of more than ten years. It can generally increase yield by 8-10% on major crops such as wheat, rice and apple, and forestry has only a few years of history. Rare earth Can promote cuttings rooting and seedling growth. However, it is rare to report the role of rare earths in the seed yield and quality of trees. Therefore, we selected the poplar suitable for indoor hybridization as the material, and used rare earth elements to deal with poplar cuttings. The quantity and quality of hybrid seeds Conducted a preliminary study.