摘要
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。
In order to improve the quantity and quality of white poplar seeds produced by sexual hybridization, the branches of maternal plant were treated with rare-earth. The results indicate that there is a significant promotive effect on seed setting rate in the branches soaked with rare-earth at 200ppm or 500ppm concentration. The length and thickness of fruite ear are also promoted slightly at these concentrations. The effects of rare-earth treatments on the weight of 1000 seeds and germination rate are not obvious.
出处
《林业科学》
EI
CAS
CSCD
北大核心
1992年第5期456-458,共3页
Scientia Silvae Sinicae
关键词
杨树
有性杂交
稀土
结籽率
White poplar
Sexual hybridization
Rare-earth
Seed settingrate
