宁夏濒危野生植物灰叶铁线莲播种及扦插繁育技术研究

Different treatment propagation of wild plant Clematis canescens was tested.The result of germination percentage was 80% by vernalization treatment.The authors tested the burgeon cutting of the Clematis canescens treated with different concentration of hormones.On the medium of peat and pearlite in the ratio of 1∶1.The treatment of 200 mg·L-1 NAA + 200 mg·L-1 IBA was the best for rooting and it was inexpensive.

稀土微肥在果树上的应用

稀土是指化学元素周期表中的镧系元素及和镧系元素化学性质相似的钪和镱共17种元素的总称。根据这些元素的电子层结构和物理、化学性质,以及在矿物中的共生情况,又分为轻稀土(又称铈组)和重稀土(又称镱组)两个组。农用稀土是以镧、铈为主要成分,包含少量错、钕等元素。以轻稀土为主的无机盐或有机盐,在农业上用作肥料,由于用量少,故称为稀土微肥。在1983年全国稀土农用协作网会议上。