Abstract: With four ramie varieties of Zhongzhu No． 1，Xiangzhu No． 3，Tri-1 and the new strain R057 as materials， a nd routinal cutting plant as control， the growing development and yield-qualities affected after topping in the new plant of low branches cutting plant on ramie were studied． The results showed that the low-branches new cutting plant on ramie has higher root dry-weight， root volume， root number， root length， root diameter， stem division and leaf area ratio of the plant，and the low-branch new plant ramie also has significantly higher leaf area coefficient，growth rate and relative growth rate of the populations than the regular method，and the different of both were significant， which the root activity of new plant of the low branches cutting plant on ramie have facilitation to growth of the overground part because to the nutrients accumulated，while the luxuriant stem division growth of the overground part and the prior stem division favor for yield． The yield of the new plant of low branches cutting plant on ramie were a little higher that of the regular， the differences of plant height， stem diameter， fresh bark thickness and fibre rate of fresh bark among varieties were no significant，while the difference of yield was significant and the difference of the effective tiller number was very significant，which the effective tiller number has main function to the yield of the low branches cutting plant on ramie． The fibre qualities of low branches cutting plant on ramie were better than that of the regular and the difference of fibre finess was significant while the other characterices such as the breaking strength，breaking elongation，rate of elongation，breaking work and initial modulus were no significant，which showed the topping was favorable to the improvement on fibre finess of the low branches cutting plant on ramie．

Key words: Ramie, Low branches, Cutting plant, Growing development, Yield, Qualities

CLC Number: 

• S563.01