Correlations Between Soil Nutrient Characteristics and Kernel Quality Traits in Camellia oleifera Cultivation

doi:10.11924/j.issn.1000-6850.casb2021-0626

Abstract

Abstract:

To clarify the correlations between soil nutrient characteristics and quality traits of kernels in Camellia oleifera forest land, the samples from 7 sites of different cultivation areas in Zhejiang Province were used to analyze the soil nutrient characteristics and kernel oil content, fatty acid composition, and active ingredients including squalene, vitamin E and sitosterol of ‘Changlin’ varieties. The results showed that the soil nutrient characteristics varied dramatically among different sites and the variation coefficients of the content of soil organic matter, hydrolyzed nitrogen, available phosphorus and potassium were between 32.66% and 142.26%. A significant positive correlation was found between the content of soil organic matter and hydrolyzed nitrogen, and the content of available phosphorus and available potassium as well (P<0.01). It was clear that the balance application of organic and phosphorus-potassium fertilizer was important for improving nutrient supply in Camellia oleifera cultivation. In addition, we found that the soil N/P ratio was negatively correlated with oil and monounsaturated fatty acids content in kernel (P<0.05), while positively correlated with polyunsaturated fatty acids and squalene content in kernel (P<0.05). The soil N/P ratio was an important factor affecting quality traits of Camellia oleifera and it could improve oil yield and quality when it was controlled at 7.60-26.92. This study could provide reference for efficient soil nutrient management in Camellia oleifera cultivation.

Key words: Camellia oleifera, soil nutrients, N/P ratio, kernel oil content, active ingredients

CLC Number:

CAO Yongqing, YAO Xiaohua, REN Huadong, WANG Kailiang, LI Jianxin, ZHOU Qing. Correlations Between Soil Nutrient Characteristics and Kernel Quality Traits in Camellia oleifera Cultivation[J]. Chinese Agricultural Science Bulletin, 2022, 38(16): 81-85.

Figures/Tables 6

References 19

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试验点	地点	经纬度	海拔/m	平均年降雨量/mm
1	衢州江山市清湖镇	28°64′N,118°59′E	60	1648.1
2	衢州江山市碗窑乡	28°64′N,118°72′E	500	1648.1
3	金华市婺城区	20°01′N,119°30′E	80	1400
4	衢州市常山县东案乡	29°00′N,118°69′E	60	1760.1
5	温州市瑞安高楼镇	27°85′N,120°31′E	300	1527.2
6	金华市磐安县仁川镇	28°86′N,120°38′E	400	1573
7	金华市磐安县仁川镇	28°86′N,120°38′E	700	1573

试验点	地点	经纬度	海拔/m	平均年降雨量/mm
1	衢州江山市清湖镇	28°64′N,118°59′E	60	1648.1
2	衢州江山市碗窑乡	28°64′N,118°72′E	500	1648.1
3	金华市婺城区	20°01′N,119°30′E	80	1400
4	衢州市常山县东案乡	29°00′N,118°69′E	60	1760.1
5	温州市瑞安高楼镇	27°85′N,120°31′E	300	1527.2
6	金华市磐安县仁川镇	28°86′N,120°38′E	400	1573
7	金华市磐安县仁川镇	28°86′N,120°38′E	700	1573

试验点	pH	有机质/(g/kg)	水解性氮/(mg/kg)	有效磷/(mg/kg)	速效钾/(mg/kg)	氮磷比	氮钾比
1	5.04	6.02	33.80	0.68	50.30	49.78	0.67
2	4.88	9.41	26.70	13.10	48.80	2.04	0.55
3	4.61	18.70	58.90	4.18	49.10	14.09	1.20
4	4.83	17.30	73.60	66.60	97.90	1.11	0.75
5	5.01	14.70	76.20	32.90	71.10	2.32	1.07
6	4.96	38.60	147.00	2.54	61.50	57.87	2.39
7	4.81	19.10	60.10	0.95	40.20	63.33	1.50
平均值	4.88	17.69	68.04	17.28	59.84	27.22	1.16
变异系数/%	3.01	59.02	58.05	142.26	32.66	104.56	54.66

试验点	pH	有机质/(g/kg)	水解性氮/(mg/kg)	有效磷/(mg/kg)	速效钾/(mg/kg)	氮磷比	氮钾比
1	5.04	6.02	33.80	0.68	50.30	49.78	0.67
2	4.88	9.41	26.70	13.10	48.80	2.04	0.55
3	4.61	18.70	58.90	4.18	49.10	14.09	1.20
4	4.83	17.30	73.60	66.60	97.90	1.11	0.75
5	5.01	14.70	76.20	32.90	71.10	2.32	1.07
6	4.96	38.60	147.00	2.54	61.50	57.87	2.39
7	4.81	19.10	60.10	0.95	40.20	63.33	1.50
平均值	4.88	17.69	68.04	17.28	59.84	27.22	1.16
变异系数/%	3.01	59.02	58.05	142.26	32.66	104.56	54.66

	有机质	水解性氮	有效磷	速效钾
有机质	1.000	0.948^**	-0.118	0.123
水解性氮		1.000	0.039	0.318
有效磷			1.000	0.935^**
速效钾				1.000