Abstract: Based　on　the　investigation　of　35　plantations　of　clone　I69，　the　difference　between　edge　tree　and　standing　tree　in　DBH，　tree　crown，　tree　height　and　volume　was　compared．　The　results　indicated　that　the　edge　growth　effect　in　DBH，　tree　crown　and　volume　rised　with　the　increasing　of　stand　density，　but　the　difference　in　tree　height　between　edge　tree　and　standing　tree　was　slight．　There　existed　a　great　difference　in　edge　growth　effects　for　various　orientations　which　the　edge　row　located．　In　four　orientations　（East，　South，　West　and　North），　E　orientation　had　the　highest　edge　growth　effects，　W　orientation　was　the　second　and　N　orientation　was　the　lowest．　The　time　which　edge　growth　effects　occured　was　different　from　various　stand　density　plantations，　the　higher　the　stand　density　was，　the　earlier　the　edge　growth　effect　happened．　For　the　stand　which　stand　density　was　400　stems／hm2，　the　edge　growth　effect　appeared　about　7～8　years．　On　the　basis　of　tree　edge　growth　effects，　the　suitable　planting　density，　reasonable　spacing　of　planting　spots　and　optimum　patterns　were　suggested　for　poplar　plywood　plantations．