Phytomass production of grasslands in Xilin River basin,Xilingol,Inner Mongolia,China (Report of the field study under the Monbusho International Scientific Research Program)

摘要

The grasslands in the Xilin River basin, Inner Mongolia were classified based on land use and land from. Ten stands dominated by different species were recognized according to land use on different land forms: Festuca. dahurica-Artemisia frigida stand, Aneurolepidium chinense-Artemisia commulata stand, Iris typhifolia-Ach- natherum splendens stand, Slipa grandis-Aneurolepidium chinense koelaria cristata stand, Filifolium sibiricum -Allium condensatum stand, Populus davidiana-Berula platyphylla stand and Typ[?]a angustifolia-Scirpus orientalis stand. The stands used for grazing were dominaled by Aneurslepidium chinense and Artemisia commutata on the slope and festuca dahurica and Artemisia frigida on the summit of hills. The dominant specics of meadow were Slipa grandis, Aneurolepidium chinense and Koelaria cristata. The most common stand in Xilinhot River basin was Aneurolepidium chinense-Artemisia commulala stand was 1.44 tons in dry weight and 3.44 tons in fresh weight per hectare. The plants of the grassland contained 2 tons of water per hectare. The plant litter and dung of livestock were 1.22 and 0.99 tons per hectare. The floristic composition of the lightly grazed site changed little w the site was protected from grazing for 7 years though average plant height was lessened. Key word: Inner Mongolia, grassland, phytomass produchion land use.