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

doi:10.12302/j.issn.1000-2006.202104011

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2021, Vol. 45 ›› Issue (4): 67-75.doi: 10.12302/j.issn.1000-2006.202104011

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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 E-mail:ljt2200004@bjfu.edu.cn;jlm@bjfu.edu.cn

Abstract

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

CLC Number:

S725.5

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, 2021, 45(4): 67-75.

Figures/Tables 6

Table 1

Table 2

Fig.1

Table 3

Table 4

Table 5

A correlation between leaf and soil nutrient contents and stoichiometric ratios of plantation in the early fruiting stage"

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

Table 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

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

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