Leaf stoichiometry and nutrient reabsorption efficiency of Phyllostachys edulis and its varieties

doi:10.12302/j.issn.1000-2006.201910034

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2021, Vol. 45 ›› Issue (1): 79-85.doi: 10.12302/j.issn.1000-2006.201910034

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Leaf stoichiometry and nutrient reabsorption efficiency of Phyllostachys edulis and its varieties

GUO Wen¹(), QI Lianghua¹^,²^,^*(), LEI Gang¹^,²^,³, HU Xuan¹, ZHANG Jian¹, SHU Qi¹, SHANG Ze’an¹

1. Key Laboratory of Bamboo and Rattan Science and Technology, International Centre for Bamboo and Rattan, Beijing 100102, China
2. Anhui Taiping Experimental Station of ICBR, Taiping 245700, China
3. National Positioning and Monitoring Station for Bamboo Ecosystem in Taiping, Taiping 245700, China

Received:2019-10-28 Accepted:2020-02-27 Online:2021-01-30 Published:2021-02-01
Contact: QI Lianghua E-mail:guobowen11@163.com;qlh@icbr.ac.cn

Abstract

Abstract:

【Objective】 The objective of this work was to evaluate the nutrient reabsorption efficiency of Phyllostachys edulis and its varieties, and to identify the ecological adaptation mechanism of the main nutrient elements. This will provide a scientific basis for the sustainable management of P. edulis and its varieties. 【Method】In this study, the leaf stoichiometric characteristics and nutrient reabsorption efficiency of P. edulis and its varieties (P. edulis cv. Luteosulcata, P. edulis cv. Tao Kiang, P. edulis cv. Pachyloen, and P. edulis cv. Gracilis) were analyzed at different ages (1, 3, 5 a). 【Result】 The content of carbon and nitrogen in the leaves of P. edulis and its varieties varied slightly, while the content of phosphorus fluctuated greatly. The contents of C, N and P in the leaves of different bamboo species at the same age were significantly different. The nutrient content in leaves of 1-year bamboo was relatively high. With an increase in age, the adaptability of bamboo gradually decreased. There were some differences in the leaf stoichiometric ratio between P. edulis and its varieties at the same age and between the same variety at different ages. The reabsorption efficiency of N and P in the leaves of P. edulis at different ages was higher. The effect of age on the N reabsorption efficiency of leaves of P. edulis and its varieties increased at first and then decreased, but the P reabsorption efficiency of bamboo leaves fluctuated greatly at different ages. 【Conclusion】 The growth of P. edulis and its varieties was limited by the P element, and the adaptability changed with an increase in age for P. edulis and its varieties. P. edulis cv. Tao Kiang showed strong adaptability, while P. edulis cv. Pachyloen had the opposite trait.

Key words: Phyllostachys edulis varieties, C/N/P ecological stoichiometry, mature leaf, withered leaf, reabsorption efficiency

CLC Number:

S718

GUO Wen, QI Lianghua, LEI Gang, HU Xuan, ZHANG Jian, SHU Qi, SHANG Ze’an. Leaf stoichiometry and nutrient reabsorption efficiency of Phyllostachys edulis and its varieties[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2021, 45(1): 79-85.

Figures/Tables 4

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Table 1

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References 29

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时期 period	化学计量比 stoichiometry	竹龄/a bamboo age		比值ratio
时期 period	化学计量比 stoichiometry	竹龄/a bamboo age		H		HC		M		HB	JS
成熟叶 mature leaf	C/N	1	14.59±0.25 Aa		15.04±0.21 Aa		15.09±0.83 Aa		13.10±0.46 Ab		15.11±0.17 Aa
		3	13.78±0.22 Ac		14.97±0.50 Ab		16.54±0.54 Aa		13.30±0.20 Ac		15.13±0.35 Ab
		5	12.81±0.35 Bc		14.36±0.26 Aab		15.16±0.23 Aa		13.64±0.31 Abc		15.42±0.59 Aa
	C/P	1	1 568.03±194.28 Aab		1 513.42±180.42 Bab		1 825.94±133.37 Bab		1 658.49±113.19 Bb		2 004.82±77.10 Aa
		3	1 760.53±247.60 Ab		2 533.31±282.65 Aa		2 288.22±58.80 Bab		2 025.33±64.43 Aab		2 054.33±119.50 Aab
		5	1 936.15±524.12 Ab		2 335.74±150.84 Aab		2 929.51±278.34 Aa		1 527.85±62.90 Bb		1 912.42±91.37Ab
	N/P	1	107.55±13.35 Aa		100.65±11.92 Ba		121.96±9.18 Ba		127.90±11.61 ABa		132.89±6.53 Aa
		3	126.93±15.99 Ab		169.76±19.63 Aa		139.19±7.19 Bab		152.61±6.21 Aab		135.78±7.28 Aab
		5	150.77±40.01 Aab		162.94±10.83 Aab		193.92±20.29 Aa		112.29±5.48 Bb		125.17±8.68 Ab
凋落叶 withered leaf	C/N	1	23.73±1.67 Aa		16.30±0.41 Bb		16.12±0.23 Bb		14.10±0.42 Bb		15.51±0.33 Ab
		3	23.76±1.51 Aa		17.88±0.67 Abc		20.05±0.72 Ab		15.29±0.37 Bc		20.28±0.77 Ab
		5	19.67±1.22 Aa		16.62±0.27 ABc		16.53±0.34 Bc		17.09±0.81 Abc		19.48±0.99 Aab
	C/P	1	5 407.14±1 250.29 Aa		2 273.74±315.61 Ab		1 928.78±63.55 Cb		1 852.57±74.65 Bb		1 988.96±76.91 Bb
		3	4 649.96±1 086.91 Aa		3 355.61±328.64 Aa		3 137.53±229.63 Aa		2 569.46±272.18 Aa		3 899.10±869.23 Aa
		5	2 644.93±348.29 Aa		3 101.29±541.62 Aa		2 639.02±140.79 Ba		2 197.04±160.72 ABa		3 206.84±212.85 ABa
	N/P	1	218.27±35.94 Aa		138.33±15.98 Ab		119.62±3.52 Bb		131.75±6.15 Bb		128.38±5.25 Ab
		3	190.60±33.76 Aa		186.09±11.65 Aa		156.13±8.65 Aa		167.14±14.71 Aa		188.05±35.36 Aa
		5	136.94±20.97 Aab		186.47±32.42 Aa		159.48±6.88 Aab		128.26±5.99 Bb		164.22±4.02 Aab

养分 nutrient	竹龄/a bamboo age		重吸收效率/% resorption efficiency
养分 nutrient	竹龄/a bamboo age		H		HC		M		HB	JS
N	1	40.84±4.74 Aa		8.40±3.19 Ab		4.93±4.99 Bb		7.54±2.67 Bb		-2.14±3.19 Bb
	3	46.69±3.94 Aa		16.16±4.08 Ac		22.63±4.96 Abc		14.56±3.58 ABc		30.65±2.80 Ab
	5	42.49±2.38 Aa		13.84±2.74 Abc		9.30±1.28 Bc		23.24±4.12 Ab		24.03±6.07 Ab
P	1	67.44±7.00 Aa		31.80±3.07 Ab		3.25±1.55 ABc		9.40±3.69 Ac		-5.62±3.44 Bc
	3	62.45±5.73 Aa		21.71±10.24 Ab		30.69±5.20 Ab		19.86±7.62 Ab		42.67±10.12 Aab
	5	33.05±7.67 Aa		13.84±4.42 Aab		-12.61±6.93 Bb		31.41±7.88 Aa		42.82±4.12 Aa

Leaf stoichiometry and nutrient reabsorption efficiency of Phyllostachys edulis and its varieties

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