The sand storm dust adheres to the crops' leaves

has obvious negative influences to crops' Pn

Tr

Gs and respiration

and even causes the crop output to drop finally.The paper presented gas exchanges on three traditional crops in Minqin.It mainly solved the dust capacity of leaves influence on respiration rate of different crops as well as the different period of duration

the different position of leaves to respiration influence.The results showed that(1)The rate of net photosynthetic rate(Pn)

transpiration r...