The plant diversity and folk utilizable plants of swidden agroecosystems in Daka, Xishuangbanna were described in this paper. The result shows that species richness index differs from 2 to 9.5 in different subsystems ...The plant diversity and folk utilizable plants of swidden agroecosystems in Daka, Xishuangbanna were described in this paper. The result shows that species richness index differs from 2 to 9.5 in different subsystems of swidden agroecosystem. There are 79 kinds of folk utilizable plants of swidden agroecosystem that belong to 38 families and 64 genus. Correspondingly,most of them belong to Euphorbiaceae, Papilionaceae, Rubiaceae, Malvaceae and Compositae . At last a list of folk utilizable plants found in sampling plots is presented.展开更多
This paper deals with variation of agrolandscape pattern in Daka village,Xishuangbanna,China with following indices:① number and size of patches,② indices of patch isolation and fragmentation,③ indices of landscape...This paper deals with variation of agrolandscape pattern in Daka village,Xishuangbanna,China with following indices:① number and size of patches,② indices of patch isolation and fragmentation,③ indices of landscape diversity,dominance,and evenness,④ landscape coefficient.The result showed that the mean patch size of forest and grassland community decreased while that of the cash crop garden increased.The indices of isolation for forest and cash crop garden community increased decreaged while that for the grassland decreased.Correspondingly,the index of landscape dominance decreased while the diversity and evenness increased from 1.4173 and 0.6450 to 1.4595 and 0.6642 repectively.The land utilization coefficient index increased from 191.4 to 238.3 throughout after 14 years.展开更多
文摘The plant diversity and folk utilizable plants of swidden agroecosystems in Daka, Xishuangbanna were described in this paper. The result shows that species richness index differs from 2 to 9.5 in different subsystems of swidden agroecosystem. There are 79 kinds of folk utilizable plants of swidden agroecosystem that belong to 38 families and 64 genus. Correspondingly,most of them belong to Euphorbiaceae, Papilionaceae, Rubiaceae, Malvaceae and Compositae . At last a list of folk utilizable plants found in sampling plots is presented.
文摘This paper deals with variation of agrolandscape pattern in Daka village,Xishuangbanna,China with following indices:① number and size of patches,② indices of patch isolation and fragmentation,③ indices of landscape diversity,dominance,and evenness,④ landscape coefficient.The result showed that the mean patch size of forest and grassland community decreased while that of the cash crop garden increased.The indices of isolation for forest and cash crop garden community increased decreaged while that for the grassland decreased.Correspondingly,the index of landscape dominance decreased while the diversity and evenness increased from 1.4173 and 0.6450 to 1.4595 and 0.6642 repectively.The land utilization coefficient index increased from 191.4 to 238.3 throughout after 14 years.