亚寒带荒漠草原不同树种人工林土壤生态化学计量特征

doi:10.13866/j.azr.2021.05.20

Abstract

Abstract:

In order to explore the effects of different tree spices on soil nutrients and ecological stoichiometry in sub-frigid desert steppe, combining the method of field investigation and indoor analysis, we analyzed soil nutrients (C、N、P、K) and ecological stochiometry of soil for Nursultan, capital of Kazakhstan of three different tree spcies. The results shouwd that: (1) Soil nutrient content was affected by tree species, but there was no significant difference in ecological stoichiometry among different tree species. (2) Soil organic carbon and total nitrogen contents in different tree species plantations increased significantly after plantation. The differences of soil surface organic carbon and total N contents between coniferous forest and broad-leaved forest were significant. (3) Soil C, N and P contents showed extremely significant positive correlation, and C content was the controlling factor of C: N and C:P, while N content was the controlling factor of N:P. Although the soil nutrient content increased significantly, the overall level was still lower than the global average level, and the local soil nutrient content was still in a state of shortage. N is the limiting factor of nutrient cycle and plant growth in this area. Appropriate application of nitrogen fertilizer in the growth process of plantation can accelerate the growth and ecological restoration process of shelterbelt. This study can provide scientific basis for the protection forest construction and sustainable management in Nursultan, capital of Kazakhstan.

Key words: soil, desert steppe, characteristics of ecological stoichiometry, soil nutrient, Kazakhstan

LOU Boyuan,WANG Yongdong,YAN Jinsheng,Akida Askar. Characteristics of soil ecological stoichiometry of different tree spcies in sub-frigid desert steppe[J].Arid Zone Research, 2021, 38(5): 1385-1392.

Figures/Tables 4

Tab. 1

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References 39

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林分类型	林龄/a	经纬度
白桦	11	51°14′15.15″N,71°43′27.51″E
樟子松纯林	11	51°12′03.02″N,71°41′53.49″E
梣叶槭纯林	11	51°11′31.71″N,71°39′26.49″E
CK	-	51°09′11.08″N,71°40′4.81″E

土层/cm	树种	C:N	C:P	N:P
0~20	白桦	13.5±0.6Aa	49.81±3.09Aa	3.69±0.19Aa
	樟子松	13.32±0.33ABa	44.32±1.52Aa	3.33±0.03Aa
	梣叶槭	12.62±0.73ABa	46.77±2.02Aa	3.72±0.36Aa
	CK	12.09±0.32Ba	33.3±2.87Ba	2.75±0.18Ba
20~40	白桦	11.67±2.36Aa	36.36±11.47Aa	3.05±0.33Aab
	樟子松	10.6±1.33Aa	25.73±1Ab	2.46±0.31Ab
	梣叶槭	11.42±1.6Aa	34.75±5.15Aab	3.04±0.24Aa
	CK	12.05±2.87Aa	21.2±7.63Aab	1.7±0.26Bb
40~60	白桦	11.64±1.44Aa	34.04±6.66Aa	2.9±0.3Ab
	樟子松	11.51±1.85Aa	15.86±4.52Bc	1.39±0.41Bc
	梣叶槭	11.69±1.33Aa	20.78±8.98ABb	1.72±0.53Bb
	CK	10.22±1.83Aa	12.88±6.69Bb	1.3±0.62Bb

	SOC	TN	TP	TK	C:N	C:P	N:P
SOC	1
TN	0.966^**	1
TP	0.597^**	0.579^**	1
TK	0.386^*	0.413^*	-0.354	1
C:N	0.675^**	0.477^*	0.331	0.192	1
C:P	0.914^**	0.879^**	0.239	0.631^**	0.663^**	1
N:P	0.821^**	0.873^**	0.122	0.710^**	0.374	0.936^**	1

Characteristics of soil ecological stoichiometry of different tree spcies in sub-frigid desert steppe

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