无患子初果期人工林土壤和叶片C、N、P化学计量特征

doi:10.12302/j.issn.1000-2006.202104011

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南京林业大学学报（自然科学版） ›› 2021, Vol. 45 ›› Issue (4): 67-75.doi: 10.12302/j.issn.1000-2006.202104011

• 专题报道Ⅱ(执行主编方升佐) • 上一篇下一篇

无患子初果期人工林土壤和叶片C、N、P化学计量特征

刘俊涛¹(), 仲静¹, 刘济铭¹, 罗水晶², 王冕之¹, 范嘉霖¹, 贾黎明¹^,^*()

1.北京林业大学,省部共建森林培育与保护教育部重点实验室,北京 100083
2.福建源华林业生物科技有限公司,福建建宁 354500

收稿日期:2021-04-08 接受日期:2021-06-03 出版日期:2021-07-30 发布日期:2021-07-30
通讯作者: 贾黎明
基金资助:
国家科技基础资源调查专项(2019FY100803)

Stoichiometric characteristics of soil and leaves in Sapindus mukorossi plantation at an early fruiting stage

LIU Juntao¹(), ZHONG Jing¹, LIU Jiming¹, LUO Shuijing², WANG Mianzhi¹, FAN Jialin¹, JIA Liming¹^,^*()

1. Key Laboratory of Silviculture and Conservation of the Ministry of Education, Beijing Forestry University, Beijing 100083, China
2. Fujian Yuanhua Forestry Biotechnology Co., Ltd., Jianning 354500, China

Received:2021-04-08 Accepted:2021-06-03 Online:2021-07-30 Published:2021-07-30
Contact: JIA Liming

摘要/Abstract

摘要：

【目的】了解无患子无性系人工林初果期C、N、P化学计量差异及其养分元素间相互作用。【方法】以福建省建宁县无患子无性系媛华人工林为研究对象,选择其初果期具有代表性的地段,分别设置3块20 m×10 m样地,测定了土壤(有机碳、全氮、全磷、全钾、有效磷、有效钾、碱解氮)和叶片(碳、氮、磷、钾)养分含量,并计算土壤和叶片的碳、氮、磷元素计量比(记为C/N、C/P、N/P),分析处于初果期的无患子人工林土壤和叶片养分含量及化学计量特征。【结果】无患子无性系媛华人工林土壤有机碳、全氮、全钾、有效磷含量在初果期随林龄增大而增加,土壤全磷变化不明显且含量较低(0.36 g/kg);土壤C/N随林龄增加逐步减小,而C/P和N/P有一定增加趋势;叶片碳和磷含量随林龄增加而逐渐增大,氮含量逐渐降低,钾含量无显著变化,其人工林叶片C/N有一定程度升高,C/P和N/P随林龄增加出现逐渐降低的趋势。此外,无患子人工林土壤有机碳和全氮含量具有显著正相关;无患子叶片碳与氮之间呈负相关,但碳与磷、钾呈正相关。同时,无患子无性系人工林叶片C含量与土壤有机碳含量在0~20和≥40~60 cm的土层呈显著正相关,在≥20~40 cm的土层中呈极显著正相关;叶片磷P含量与土壤有机碳含量在0~20 cm呈极显著正相关,在≥20~40和≥40~60 cm的土层中呈显著正相关;N/P与土壤有机碳含量在0~20 和≥40~60 cm呈极显著负相关,在≥20~40 cm土层中呈显著负相关。【结论】在无患子人工林初果期,土壤养分主要受P的限制,因此,苗木定植后的结果初期,可适当增加磷肥的投入。

关键词: 无患子无性系, 初果期, 土壤养分, 叶片养分, 生态化学计量, 无性系媛华

Abstract:

【Objective】 This study aimed to elucidate differences in C, N and P in a soapberry (Sapindus mukorossi) plantation at the first fruit stage of clones and their nutrient element interactions. 【Method】 A clonal plantation in Jianning County, Fujian Province, was used to establish three plots of 20 m×10 m. Soil parameters (organic C, total N, total P, total K, effective P, available P, and alkali N) and leaf parameters (C, N, P and K) were measured, and the C, N and P element ratios were calculated. Nutrient contents and chemical characteristics of soil and leaves at different forest ages at the initial fruit stage were analyzed. 【Result】 The content of organic C, total N, total P and available P increased with forest age, while no change in total P in soil was observed, and the content was low (0.36 g/kg). Soil C/N ratios decreased gradually with the increase of forest age, while C/P and N/P ratios increased to a certain extent. With the increase of forest age, the contents of C and P in leaves increased gradually, while the contents of N decreased gradually, while the contents of K had no significant change. The C/N ratio of leaves increased to a certain extent, while the C/P and N/P ratios decreased gradually. In addition, there was a significant positive correlation between soil organic carbon (SOC) and total N in Sapindus mukorossi plantation. There was a negative correlation between C and N, but a positive correlation between C and P, K. At the same time, there was a significant positive correlation between leaf C content and SOC content in 0-20 cm and ≥ 40-60 cm soil layers, and a very significant positive correlation in ≥20-40 cm soil layers. There was a significant positive correlation between leaf P content and SOC content in 0-20 cm, and a significant positive correlation between leaf P content and SOC content in ≥20-40 and ≥ 40-60 cm soil layers; N/P was significantly negatively correlated with SOC content in 0-20 cm and ≥40-60 cm soil layers, and significantly negatively correlated with SOC content in ≥ 20-40 cm soil layers. 【Conclusion】 Plantation soils at the early fruiting stage were mainly limited regarding P, thus P fertilization should be increased accordingly for future planting processes.

Key words: soapberry (Sapindus mukorossi) clone, primary fruit period, soil nutrient, leaf nutrient, ecological stoichiometry, Yuanhua clone

中图分类号:

S725.5

刘俊涛,仲静,刘济铭,等. 无患子初果期人工林土壤和叶片C、N、P化学计量特征[J]. 南京林业大学学报（自然科学版）, 2021, 45(4): 67-75.

LIU Juntao, ZHONG Jing, LIU Jiming, LUO Shuijing, WANG Mianzhi, FAN Jialin, JIA Liming. Stoichiometric characteristics of soil and leaves in Sapindus mukorossi plantation at an early fruiting stage[J].Journal of Nanjing Forestry University (Natural Science Edition), 2021, 45(4): 67-75.DOI: 10.12302/j.issn.1000-2006.202104011.

图/表 6

表1

表2

图1

表3

表4

表5

初果期无患子人工林叶片和土壤养分含量及计量比相关性"

土层/cm layer		土壤养分 soil nutrient			叶片养分leaf nutrient
土层/cm layer		土壤养分 soil nutrient			C			N		P			K			C/N			C/P		N/P
0~20		SOC	0.783^*			-0.704^*			0.853^**			-0.126			0.763^*			-0.775^*			-0.899^**
		TN	0.788^*			-0.669^*			0.881^**			-0.037			0.739^*			-0.825^**			-0.905^**
		TP	-0.359			0.101			-0.757^*			-0.257			-0.192			0.774^*			0.585
		TK	0.619			-0.793^*			0.527			0.015			0.810^**			-0.443			-0.673^*
		AK	-0.154			0.296			-0.375			-0.204			-0.312			0.356			0.355
		AP	0.707^*			-0.379			0.840^**			0.008			0.483			-0.813^**			-0.785^*
		AHN	0.667^*			-0.106			0.339			0.033			0.210			-0.175			-0.298
		C/N	-0.672^*			0.496			-0.760^*			-0.124			-0.570			0.756^*			0.753^*
		C/P	0.755^*			-0.612			0.934^**			-0.019			0.687^*			-0.871^**			-0.916^**
		N/P	0.763^*			-0.601			0.911^**			0.020			0.681^*			-0.860^**			-0.897^**
土层/cm layer	土壤养分 soil nutrient			叶片养分leaf nutrient
土层/cm layer	土壤养分 soil nutrient			C			N				P			K			C/N			C/P		N/P
≥20~40	SOC			0.827^**			-0.563				0.784^*			0.149			0.656			-0.683^*		-0.790^*
	TN			0.793^*			-0.628				0.888^**			-0.020			0.706^*			-0.817^**		-0.888^**
	TP			-0.105			0.325				0.001			0.149			-0.286			-0.109		0.067
	TK			0.781^*			-0.571				0.948^**			-0.057			0.669^*			-0.872^**		-0.924^**
	AK			-0.409			0.420				-0.783^*			-0.177			-0.475			0.812^**		0.724^*
	AP			0.810^**			-0.491				0.643			0.013			0.596			-0.528		-0.661
	AHN			0.587			-0.724^*				0.720^*			-0.393			0.752^*			-0.611		-0.804^**
	C/N			-0.725^*			0.610				-0.811^**			0.148			-0.671^*			0.763^*		0.830^**
	C/P			0.722^*			-0.598				0.673^*			0.054			0.659			-0.548		-0.698^*
	N/P			0.747^*			-0.643				0.851^**			-0.030			0.708^*			-0.769^*		-0.855^**
≥40~60	SOC			0.793^*			-0.722^*				0.734^*			0.096			0.811^**			-0.639		-0.832^**
	TN			0.702^*			-0.359				0.742^*			0.267			0.458			-0.642		-0.660
	TP			0.084			-0.135				-0.251			-0.007			0.099			0.290		0.121
	TK			0.839^**			-0.531				0.872^**			0.001			0.640			-0.784^*		-0.856^**
	AK			0.050			0.214				-0.325			-0.168			-0.192			0.356		0.275
	AP			0.131			-0.365				0.077			0.162			0.376			-0.024		-0.190
	AHN			0.208			-0.479				0.344			-0.447			0.472			-0.314		-0.427
	C/N			-0.454			0.027				-0.414			-0.329			-0.107			0.335		0.283
	C/P			0.730^*			-0.706^*				0.857^**			-0.051			0.783^*			-0.804^**		-0.923^**
	N/P			0.558			-0.249				0.663			0.241			0.342			-0.585		-0.559

表5

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林龄/a forest age	地径/cm ground diameter	树高/m tree height	平均冠幅/m average crown width	造林密度/ (株·hm^-2) afforestation density
5	6.51±0.25	2.14±0.18	2.3×2.6	635
6	6.97±0.68	2.38±0.16	2.4×2.2	640
7	7.62±0.59	2.86±0.38	2.9×2.7	650

树龄/a age	c(C)/ (g·kg^-1)	c(N)/ (g·kg^-1)	c(P)/ (g·kg^-1)	c(K)/ (g·kg^-1)	C/N	C/P	N/P
5	493.61±7.59 b	21.23±0.95 a	0.95±0.06 b	18.45±2.83 a	23.29±1.37 a	514.49±39.98 a	22.36±0.75 a
6	507.49±7.27 a	20.56±0.93 a	1.06±0.07 b	17.65±5.22 a	24.71±1.38 a	478.61±29.03 ab	19.44±2.15 ab
7	512.00±2.60 a	19.40±1.55 a	1.19±0.05 a	18.70±0.49 a	26.53±2.06 a	430.15±19.49 b	16.28±1.57 b
均值mean	504.63	20.40	1.06	18.27	24.85	474.42	19.35

土壤养分 soil nutrient	SOC	TN	TP	TK	AK	AP	AHN	C/N	C/P	N/P
SOC	1
TN	0.891^**	1
TP	0.447^*	0.182	1
TK	0.250	0.521^**	-0.243	1
AK	0.604^**	0.306	0.636^**	-0.256	1
AP	0.913^**	0.871^**	0.344	0.151	0.485^*	1
AHN	0.890^**	0.736^**	0.475^*	0.140	0.632^**	0.826^**	1
C/N	-0.123	-0.540^**	0.317	-0.659^**	0.370	-0.261	-0.005	1
C/P	0.957^**	0.912^**	0.222	0.374	0.454^*	0.881^**	0.811^**	-0.207	1
N/P	0.772^**	0.963^**	-0.080	0.618^**	0.124	0.768^**	0.612^**	-0.648^**	0.852^**	1

叶片养分 leaf nutrient	C	N	P	K	C/N	C/P	N/P
C	1
N	-0.636	1
P	0.662	-0.552	1
K	0.043	0.154	-0.048	1
C/N	0.749^*	-0.985^**	0.623	-0.097	1
C/P	-0.492	0.458	-0.971^**	0.013	-0.511	1
N/P	-0.745^*	0.779^*	-0.950^**	0.107	-0.831^**	0.892^**	1

无患子初果期人工林土壤和叶片C、N、P化学计量特征

Stoichiometric characteristics of soil and leaves in Sapindus mukorossi plantation at an early fruiting stage

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