The tritium concentration in rice root was lower than those in upper ground portion. 稻根中氚浓度低于地上部;
Within a life period of B. pilosa, content of heavy metal in upper ground parts and roots gradually increases with the growing of plants, which consistent with biomass. 在一个生命周期内,植物地上部和根系重金属含量随生命进程的发展逐渐增加,这与生物量积累一致。
The content of N, P and K of the upper ground part was higher than that of the underground part. 植株地上部氮、磷、钾含量明显高于地下部。
The results shown that the differences among different provenance and family in seedling heigth, biomass of upper ground and underground, stem size, the number of branches, shoot height, the fresh and dry weight are significant. 种源或家系间苗木的全高、地上及地下部分、径粗、分枝数、秋梢高生长、干鲜重等主要性状均有显著差异。
The problems of environmental protection and energy reservation is more and more serious, while the increasing scarcity of architectural area at upper ground makes the transverse development ratio of urban usable space less and less. 环境保护与能源保护的问题逐渐显示出来,而地表的建筑面积越来越稀缺,城市可利用空间的横向发展比率越来越小。