4PU-30[N-phenyl-′N-(2-chloro-4-pyridyl)urea]is a new type of plant growthregulator with cytokinin properties.It hasbeen confirmed to delay rice leaf senescenc
According to customs statistics, on August 10th, in January-July 2012 ,China’s foreign trade imports and exports valued at USD 2,168.37 billion. Compared with