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LU Ru-bing, DU Ying, BAO Yong-xin, QIU Zi-yan, SONG Chao, SONG Xin-zhang*#br#
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Abstract: The nonstructural carbohydrate (NSC) concentration in plant tissues reflects carbon supply of the whole plant; however, the response of NSC to increasing nitrogen (N) deposition is poorly understood. Phyllostachys edulis is widely distributed in southern China and plays an important role in the construction of ecological environment in subtropical regions and the economic development in mountainous areas. An experiment was conducted in conventionally managed P. edulis plantations with three N addition treatments of 30, 60, 90 kg·hm-2·a-1, and the control (no fertilization) over a 32month period. The results showed that: (1) The soluble sugar was a major component of the NSC in P. edulis. (2) The NSC concentration in three organs of P. edulis was ranked by trunk (4.1%) > leaf (3.6%) > branch (3.3%). (3) The NSC concentration of leaf of 4-year-old P. edulis was significantly lower than that of 2-year-old one (P<0.05), the P. edulis age significantly influenced the NSC concentration in trunk (P<0.05) but not in branch (P>0.05). (4) N deposition significantly influenced the NSC concentrations of branch and trunk (P< 0.05), and the NSC concentrations of trunk under the low N addition treatment (30 kg·hm-2·a-1) was the lowest. (5) The interaction of N deposition and P. edulis age significantly influenced the NSC concentrations of the three organs (P<0.05). The moderate N deposition would promote the growth of P. edulis and contribute to more biomass carbon accumulation.
LU Ru-bing, DU Ying, BAO Yong-xin, QIU Zi-yan, SONG Chao, SONG Xin-zhang*. Effects of simulated nitrogen deposition on the composition and allocation of nonstructural carbohydrates of Phyllostachys edulis.[J]. cje.
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URL: https://www.cje.net.cn/EN/abstract/abstract22637.shtml
https://www.cje.net.cn/EN/Y2017/V36/I3/584