Deficiency of nutrients and the role of legume species in restoration of mined wastelands are reviewed in this paper.The deficiency of major nutrients,especially poverty of nitrogen,is one of the most important limiti...Deficiency of nutrients and the role of legume species in restoration of mined wastelands are reviewed in this paper.The deficiency of major nutrients,especially poverty of nitrogen,is one of the most important limiting factors for vegetation restoration of mining wastelands.Legume species are very useful in restoration of wasteland because N-fixing properties of legume can increase the accumulation of nitrogen and organic matter.Effects of edaphic conditions,especially heavy metal toxicity on N-fixing of rhizobia-legume symbiotic,selection for tolerant legume species and application of those species on restoration of mining wastelands were also discussed.展开更多
Taxus plants were a kind of important vegetative resources due to that their bark and leaves contain an effective anticancer component taxol. It is very necessary that Taxus planting base was set up,because Taxus popu...Taxus plants were a kind of important vegetative resources due to that their bark and leaves contain an effective anticancer component taxol. It is very necessary that Taxus planting base was set up,because Taxus population was rare in the natural communities. The cuttings of annual twigs of Taxus mairei without any hormone treatment grow out roots slowly,more than 5 months after have being cut,and their rate of growing roots is lower,only about 30%. In contrast,the cuttings treated with 100～200 mg·L -1 of rooting powder ABT 1 and ABT 2 can significantly increase 12%～14% of survival rate,83%～98% of rooting rate (percentage),more 60%～107% of rooting number and 60%～103% of total rooting length per rooting cutting.展开更多
文摘Deficiency of nutrients and the role of legume species in restoration of mined wastelands are reviewed in this paper.The deficiency of major nutrients,especially poverty of nitrogen,is one of the most important limiting factors for vegetation restoration of mining wastelands.Legume species are very useful in restoration of wasteland because N-fixing properties of legume can increase the accumulation of nitrogen and organic matter.Effects of edaphic conditions,especially heavy metal toxicity on N-fixing of rhizobia-legume symbiotic,selection for tolerant legume species and application of those species on restoration of mining wastelands were also discussed.
文摘Taxus plants were a kind of important vegetative resources due to that their bark and leaves contain an effective anticancer component taxol. It is very necessary that Taxus planting base was set up,because Taxus population was rare in the natural communities. The cuttings of annual twigs of Taxus mairei without any hormone treatment grow out roots slowly,more than 5 months after have being cut,and their rate of growing roots is lower,only about 30%. In contrast,the cuttings treated with 100～200 mg·L -1 of rooting powder ABT 1 and ABT 2 can significantly increase 12%～14% of survival rate,83%～98% of rooting rate (percentage),more 60%～107% of rooting number and 60%～103% of total rooting length per rooting cutting.
