Growth rules for a new stand of Pleioblastus chino var. hisauchii

YAO Wenjing, LIU Guohua, WU Yanping, ZHAO Fuze, WANG Fusheng, DING Yulong

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2023, Vol. 47 ›› Issue (2) : 123-129.

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南京林业大学学报（自然科学版）
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JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2023, Vol. 47 ›› Issue (2) : 123-129. DOI: 10.12302/j.issn.1000-2006.202112003

Growth rules for a new stand of Pleioblastus chino var. hisauchii

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【Objective】 This study revealed the growth rule of a new stand of Pleioblastus chino var. hisauchii, and explored the culm characteristics and rhizome growth of bamboo plants at different ages, providing a theoretical basis for cultivation and management of P. chino var. hisauchii and other bamboo species with mixed rhizome. 【Method】 We investigated the age structure and spatial distribution of 5-year-old P. chino var. hisauchii forest in the Baima experimental base of Nanjing Forestry University in Lishui District, Nanjing City. We first marked the location and age information of each bamboo plant in the forest, and randomly selected three healthy and disease-free bamboo plants at 1, 2, 3, 4 and 5 year-old. Then we measured their ground diameter, plant height, under-branch height, node length and corresponding node diameter. In addition, we traced the rhizome systems at 1, 2, 3, 4 and 5 year-old. Next, we counted the number of rhizome segments, rhizome nodes, rhizome branches buds, determined the rhizome length, rhizome diameter, rhizome node length and other indicators.【Result】 With the regeneration of new plantation forest, the number of young plants increased gradually during the previous 4 years. The ground diameter, plant height and under-branch height decreased with age. There was a linear positive correlation between ground diameter and plant height and between the under-branch height and plant height. The node diameter showed a decreased trend from base to top. There was also a linear positive correlation between the node length and node diameter. The node diameter, node length, average node diameter, and average node length of young bamboo plants were larger than those of old plants. The rhizome diameter, total rhizome length, number of rhizome segments and buds decreased with age. However, the rhizome length, rhizome node length, number of rhizome branches and shoot buds increased at first and then decreased with age, peaking in the fourth year.【Conclusion】 The new plantation forest showed an upward trend in an age structure, which was stable in the fourth year. The number of young bamboo plants was larger than that of the old plants in the previous 4 years. The young bamboo plants spread around with mother bamboo at the center. In general, the growth vigor of the aboveground and underground parts of bamboo plants decreased with age, which was strongest at two years of age.

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Pleioblastus chino var. hisauchii / new plantation / age structure / culm formation / rhizome system

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YAO Wenjing , LIU Guohua , WU Yanping , et al . Growth rules for a new stand of Pleioblastus chino var. hisauchii[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2023, 47(2): 123-129 https://doi.org/10.12302/j.issn.1000-2006.202112003

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