雷竹林下养鸡对土壤活性有机碳及碳库管理指数的影响

doi:10.11707/j.1001-7488.LYKX20220160

Abstract

Abstract:

Objective: This study analyzed the effects of bamboo chicken farming (BCF) on the active organic carbon and carbon pool management index of the topsoil of Phyllostachys praecox forest under different densities. We hope that this study will clarify the extent of disturbance to soil quality and carbon stability of bamboo forest ecosystems by BCF under different densities, and provide a scientific basis for the development of sustainable and eco-friendly under-forest farming strategies. Method: We characterized the different farming densities by the different distances from the chicken house. And we investigated the differences in the distribution of soil active organic carbon pools and the carbon pool management index under the conditions of 5 m (2.25–2.70 chickens·m^?2), 15 m (1.05–1.26 chickens·m^?2), 25 m (0.60–0.72 chickens·m^?2), 35 m (0.34–0.41 chickens·m^?2), and >60 m (CK, pure forest, 0 chickens·m^?2) from the chicken house. Result: We found that BCF could effectively promote the accumulation of soil organic carbon (SOC) compared with pure forest, but there was no significant difference in SOC at different farming densities And the active organic carbon fractions such as easily oxidizable organic carbon (EOC), light fraction organic carbon (LFOC), and particulate organic carbon (POC) were found to increase by 43.72%–76.95%, 5.55%–47.85%, and 19.59%–43.54%, respectively, in the bamboo forest chicken rearing system. But dissolved organic carbon (DOC) decreased significantly by 6.35% to 19.09% in BCF compared to pure forest. We also found that EOC, LFOC, and POC were significantly and positively correlated with SOC, but DOC was not significantly correlated with SOC in the BCF system. Compared with pure forest, carbon pool activity, activity index, carbon pool index, and carbon pool management index were found to be significantly increased in the BCF system, while the oxidative stability coefficient was significantly decreased. Conclusion: BCF improved soil carbon pool management indices and soil quality, and significantly altered the distribution of active organic carbon pools in surface soil. And higher farming density may influence litter input and disrupt surface soil structure through frequent disturbances, reducing soil water stability and affecting soil organic carbon accumulation. Moderate resting or rotation at higher farming densities may be the only way to balance the economic and environmental benefits of the current process of farming chickens in bamboo forests.

Key words: active organic carbon pools, carbon pool management index, soil quality, bamboo chicken farming, Lei bamboo (Phyllostachys praecox)

CLC Number:

S714.5

Xu Gai,Jian Zhang,Heng Lü,Zhiyuan Huang,Qiaoling Li,Zheke Zhong,Fangyuan Bian,Xiaoping Zhang. Effects of Chicken Farming on Soil Active Organic Carbon and Carbon Pool Management Index in the Lei Bamboo (Phyllostachys praecox) Forest[J]. Scientia Silvae Sinicae, 2023, 59(12): 78-86.

Figures/Tables 5

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References 0

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处理 Treatments	pH	全氮 Total nitrogen/ (g·kg^?1)	全磷 Total phosphorus/ (g·kg^?1)	水解性氮 Hydrolytic nitrogen/ (mg·kg^?1)	有效磷 Available phosphorus/ (mg·kg^?1)
5 m	6.69±0.21a	2.67±0.11a	2.25±0.04a	214.97±4.96a	27.56±1.27a
15 m	5.75±0.08b	2.80±0.14a	2.04±0.05b	220.66±3.66a	26.13±1.58ab
25 m	5.66±0.12b	2.38±0.24b	1.94±0.08b	184.43±8.35b	25.61±1.47b
35 m	5.77±0.14b	2.45±0.11b	1.66±0.16c	176.69±4.50b	24.68±1.27b
对照CK	5.02±0.06c	1.90±0.09c	0.94±0.02d	146.67±9.55c	17.85±0.80c

处理 Treatments	EOC/SOC (%)	DOC/SOC (%)	LFOC/SOC (%)	POC/SOC (%)
5 m	11.85±1.03a	0.26±0.02b	11.14±1.44d	43.50±2.62a
15 m	11.01±1.36a	0.23±0.01c	15.34±1.41a	41.41±3.70ab
25 m	9.84±1.37a	0.27±0.02b	13.22±1.45bc	36.90±2.06c
35 m	9.83±1.69a	0.23±0.02c	13.98±0.85ab	37.99±2.80bc
对照CK	7.62±1.77b	0.33±0.02a	12.09±0.44cd	35.11±1.56c

处理 Treatments	L	LI	CPI	CPMI	K_os
5 m	0.13±0.01a	1.56±0.26a	1.15±0.09a	182.62±45.21a	7.49±0.78b
15 m	0.12±0.02a	1.41±0.16a	1.17±0.13a	167.39±38.93a	8.19±1.10b
25 m	0.11±0.02a	1.51±0.25a	1.14±0.06a	171.84±34.77a	9.33±1.46b
35 m	0.11±0.02a	1.35±0.22a	1.13±0.09a	151.85±25.01a	9.44±1.93b
对照CK	0.08±0.02b	1.00±0.00b	1.00±0.00b	100.00±0.00b	12.69±3.03a

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Effects of Chicken Farming on Soil Active Organic Carbon and Carbon Pool Management Index in the Lei Bamboo (Phyllostachys praecox) Forest

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