新疆额尔齐斯河流域杨树天然林的养分含量分析

doi:10.13866/j.azr.2021.05.25

Abstract

Abstract:

Our analysis of the biomass and organ nutrient content of five main Populus natural forests in the Irtysh River Basin in Xinjiang reveals that the average N content of the leaves in the five poplar species is 19.36 g·kg^-1 and the average P content is 2.89 g·kg^-1. The N content of the leaves is close to the levels found in land plants both globally and domestically, whereas the P content of the leaves is higher than the average levels found in global and domestic land plants. The average leaf N/P ratio is 6.83, which is relatively lower than the average levels seen in both global and domestic land plants; the ratio of leaf N/P is higher than that of the stem; and the ratio of stem N/P stem is higher than that of the root. The leaf K content of P. jrtyschensis is the highest, the stem K content of P. laurifolia is the highest, and the K content in the root system of P. alba is the highest. The biomass distribution ratio of the five natural forests—P. laurifolia, P. jrtyschensis, P. canescens, P. nigra, and P. alba—1:1.03:1.15:1.23:1.37. The P. alba forest has the highest biomass distribution, and the P. laurifolia forest has the lowest biomass distribution.

Key words: Irtysh River Basin, natural forest of Populus, biomass, nutrient content, Xinjiang

SONG Jingwei,XU Ziran,CHEN Jiaxin,XU Qinghua. Nutrient content of five natural poplar forests in the Irtysh River Basin in Xinjiang[J].Arid Zone Research, 2021, 38(5): 1429-1435.

Figures/Tables 6

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References 34

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树种	C/（g·kg^-1）	N/（g·kg^-1）	P/（g·kg^-1）	K/（g·kg^-1）	叶片N∶P
欧洲黑杨（P. nigra）	429.60±6.32c	20.01±1.92	2.96±0.57	18.54±0.42ab	6.76
苦杨（P. laurifolia）	432.75±10.31bc	16.53±1.06	1.98±0.79	17.65±1.33bc	8.35
额尔齐斯河杂交杨（P. jrtyschensis）	421.29±11.20c	20.14±1.75	3.25±0.55	19.83±0.50a	6.19
银白杨（P. alba）	466.45±11.43ab	19.76±1.10	3.31±0.53	15.45±0.95c	6.87
银灰杨（P. canescens）	469.10±5.12a	20.36±1.83	2.96±0.62	16.41±0.88bc	5.97

树种	C/（g·kg^-1）	N/（g·kg^-1）	P/（g·kg^-1）	K/（g·kg^-1）	茎干N∶P
欧洲黑杨（P. nigra）	465.84±16.07	6.28±0.85	1.48±0.09	8.62±1.18ab	4.24
苦杨（P. laurifolia）	480.28±6.95	3.35±0.76	1.21±0.25	10.13±0.92a	2.76
额尔齐斯河杂交杨（P. jrtyschensis）	475.59±35.82	4.47±1.45	0.98±0.17	9.38±0.31a	4.56
银白杨（P. alba）	450.59±11.85	4.54±0.91	1.30±0.11	7.52±0.51b	3.49
银灰杨（P. canescens）	460.97±10.63	3.69±0.78	1.05±0.16	6.57±0.56b	3.51

树种	C/（g·kg^-1）	N/（g·kg^-1）	P/（g·kg^-1）	K/（g·kg^-1）	根系N∶P
欧洲黑杨（P. nigra）	511.73±7.82	2.82±0.99	2.18±0.56	3.83±0.55bc	1.29
苦杨（P. laurifolia）	515.38±6.05	1.79±0.52	2.45±0.51	4.89±0.60ab	0.76
额尔齐斯河杂交杨（P. jrtyschensis）	517.62±11.27	3.17±0.79	1.44±0.22	5.53±0.60ab	2.20
银白杨（P. alba）	500.87±13.05	4.41±0.97	3.18±0.69	7.75±1.13a	1.38
银灰杨（P. canescens）	488.02±5.52	2.10±0.83	1.22±0.28	2.90±0.32c	1.72

树种	叶片	茎干	根系	总计
欧洲黑杨（P. nigra）	12.28±0.52	405.92±17.42	76.57±3.29	494.78±21.24
苦杨（P. laurifolia）	8.25±0.41	469.11±23.96	126.90±6.48	604.27±30.85
额尔齐斯河杂交杨（P. jrtyschensis）	12.68±0.33	352.83±9.11	148.71±3.84	514.21±13.29
银白杨（P. alba）	16.64±0.48	470.54±13.59	35.57±1.02	522.74±15.11
银灰杨（P. canescens）	7.11±0.21	158.12±4.86	36.12±1.10	201.36±6.18

树种	叶片	茎干	根系	总计
欧洲黑杨（P. nigra）	5.46±0.23	118.32±5.07	40.09±1.71	163.77±7.14
苦杨（P. laurifolia）	1.88±0.09	107.06±5.46	24.18±1.23	133.13±6.79
额尔齐斯河杂交杨（P. jrtyschensis）	3.09±0.09	86.18±2.22	48.20±1.25	137.48±3.56
银白杨（P. alba）	5.81±0.16	164.38±4.75	12.06±0.35	182.25±5.26
银灰杨（P. canescens）	5.17±0.17	115.03±3.53	32.58±1.00	152.80±4.71

Nutrient content of five natural poplar forests in the Irtysh River Basin in Xinjiang

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树种	C	N	P	K
欧洲黑杨（P. nigra）	77.98±3.34	0.97±0.04	0.28±0.01	1.27±0.05
苦杨（P. laurifolia）	64.69±3.30	0.43±0.02	0.19±0.01	1.24±0.06
额尔齐斯河杂交杨（P. jrtyschensis）	67.24±1.74	0.60±0.02	0.16±0.00	1.14±0.03
银白杨（P. alba）	82.82±2.39	0.91±0.03	0.27±0.01	1.42±0.04
银灰杨（P. canescens）	71.35±2.19	0.60±0.02	0.18±0.01	0.94±0.03

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