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合理地在烤烟上施用混合硝酸稀土,有较为明显的增产效果,但是,单一稀土成分对烤烟的增产作用如何?是需要予以阐明的悬题,这对于了解不同的单一稀土成分在作物上的增产效益,及时探讨增产机理等方面,均有重要的意义,对制备农用稀土产品,也具有一定参考价值。本项试验是于1977年在云南省江川县大庄大队第四生产队进行的,处理项目分为:喷施硝酸镧、硝酸铈,硝酸镨、硝酸钕,硝
Rational application of mixed rare earth nitrate on flue-cured tobacco has obvious effect of increasing yield. However, what is the effect of a single rare-earth component on the yield increase of flue-cured tobacco? It is an issue that needs to be clarified. It is of great significance to understand the yield increase of different single rare earth components Benefits, timely exploration of the mechanism of production increase, are of great significance for the preparation of agricultural rare earth products, but also has some reference value. This test was carried out in 1977 in the fourth production team of Dachuang Brigade, Jiangchuan County, Yunnan Province. The project is divided into: spraying lanthanum nitrate, cerium nitrate, praseodymium nitrate, neodymium nitrate,