Cotton hair seeds,bare seeds and coated seeds packed with nylon fibre knitted sack,PV plastic sack with and without pores respectively and stockpiled under natural conditions for three years were used to study the change of water content,germination percentage and vigor in the period of storage.The results were as follows.When seed basic water content was lower than 12%,seeds packed with nylon fibre knitted sack lose more water and the water content changed along with the conditions of storage.There was no ...