Analysis of Nutrient Status and Spatial Distribution Characteristics of Tobacco Planting Soil in Hanzhong of Qinling Mountains based on ArcGIS

doi:10.11924/j.issn.1000-6850.cabs2022-0989

Abstract

Abstract:

The nutrient content of tobacco planting soil in Hanzhong area of Qinling Mountains was analyzed to provide theoretical basis for scientific fertilization and soil health cultivation of tobacco planting soil in Hanzhong area of Qinling Mountains. The spatial distribution law and characteristics of soil nutrients for tobacco planting in Hanzhong, Qinling Mountains were analyzed by using statistical methods and ArcGIS software. The results showed that the average values of organic matter, available nitrogen, available phosphorus, available potassium and pH of tobacco planting soil in Hanzhong, Qinling Mountains were 16.69 g/kg, 159.31 g/kg, 43.34 mg/kg, 375.22 mg/kg and pH 6.21. The content of soil organic matter mainly belonged to the fourth grade, accounting for 34.09%; the content of available nitrogen mainly belonged to the second grade, accounting for 46.59%; the content of available phosphorus, available potassium and pH mainly belonged to the first grade, accounting for 38.64%, 75.00% and 23.86%, respectively. There was a significant positive correlation between soil nutrient contents; in term of spatial distribution, the soil organic matter content and available nitrogen content were the highest in the area bordering Nanzheng County and Xixiang County, the available phosphorus content was the highest in Ningqiang County and Nanzheng County, the available potassium content was the highest in Nanzheng County, Ningqiang County and Xixiang County, and the pH level was the highest in the south-central part of Lueyang County, the southern part of Mian County, the northern part of Nanzheng County and the central part of Xixiang County. The soil nutrient content in Mian County, Yang County, Lueyang County and Xixiang County was relatively low. The soil nutrient status in Nanzheng County and Ningqiang County was good. It is suggested to increase the content of soil organic carbon by applying organic fertilizer, reduce the application of chemical fertilizer, and enhance the ability of soil carbon fixation and fertilization.

Key words: Qinling Mountains, soil nutrients, spatial distribution, organic matter, nutrient characteristics

LIU Futong, ZHENG Meiying, WANG Hui, LI Maosen, ZHAO Peiyan, ZHENG Bangxi, HE Wenqin, YAO Feng, REN Tianbao. Analysis of Nutrient Status and Spatial Distribution Characteristics of Tobacco Planting Soil in Hanzhong of Qinling Mountains based on ArcGIS[J]. Chinese Agricultural Science Bulletin, 2023, 39(35): 103-110.

Figures/Tables 6

References 24

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分级	1	2	3	4	5	6	7
有机质/(g/kg)	>40.00	30.00~40.00	20.00~30.00	15.00~20.00	12.00~15.00	10.00~12.00	<10.00
速效氮/(mg/kg)	>200.00	150.00~200.00	120.00~150.00	100.00~120.00	70.00~100.00	50.00~70.00	<50.00
有效磷/(g/kg)	>40.00	30.00~40.00	20.00~30.00	15.00~20.00	10.00~15.00	5.00~10.00	<5.00
速效钾/(g/kg)	>200.00	150.00~200.00	120.00~150.00	100.00~120.00	70.00~100.00	50.00~70.00	<50.00
pH	6.00~7.00	5.50~6.00；7.00~7.50	5.00~5.50；7.50~8.00	4.50~5.00；8.00~8.50	<4.50；>8.50

分级	1	2	3	4	5	6	7
有机质/(g/kg)	>40.00	30.00~40.00	20.00~30.00	15.00~20.00	12.00~15.00	10.00~12.00	<10.00
速效氮/(mg/kg)	>200.00	150.00~200.00	120.00~150.00	100.00~120.00	70.00~100.00	50.00~70.00	<50.00
有效磷/(g/kg)	>40.00	30.00~40.00	20.00~30.00	15.00~20.00	10.00~15.00	5.00~10.00	<5.00
速效钾/(g/kg)	>200.00	150.00~200.00	120.00~150.00	100.00~120.00	70.00~100.00	50.00~70.00	<50.00
pH	6.00~7.00	5.50~6.00；7.00~7.50	5.00~5.50；7.50~8.00	4.50~5.00；8.00~8.50	<4.50；>8.50

测定项目		区域	样本个数	最大值	最小值	平均数	标准差	变异系数/%
有机质/(g/kg)		略阳县	7	18.30	6.93	11.97	3.71	30.99
		宁强县	8	26.70	8.55	18.61	5.88	31.60
		勉县	8	17.20	7.38	12.13	3.23	26.63
		南郑县	40	47.10	7.66	18.47	7.32	39.63
		洋县	10	20.60	4.54	11.66	4.94	42.37
		西乡县	15	22.40	7.71	14.92	4.58	30.70
		总数	88	47.10	4.54	16.69	6.82	40.86
速效氮/(mg/kg)	略阳县		7	158.26	82.57	137.98	27.48	19.92
	宁强县		8	235.33	104.69	177.20	41.09	23.19
	勉县		8	150.00	91.52	129.62	21.74	16.77
	南郑县		40	364.00	112.85	176.83	43.41	24.55
	洋县		10	161.70	58.49	106.65	34.11	31.98
	西乡县		15	183.72	92.89	143.31	27.14	18.94
	总数		88	364.00	58.49	159.31	46.58	29.24
有效磷/(mg/kg)	略阳县		7	86.80	9.90	34.44	23.99	69.66
	宁强县		8	90.50	10.20	39.36	29.29	74.42
	勉县		8	26.60	5.00	15.81	6.75	42.69
	南郑县		40	129.60	5.60	58.09	32.65	56.21
	洋县		10	21.00	3.50	10.83	4.79	44.23
	西乡县		15	61.60	9.70	30.02	16.21	54.00
	总数		88	129.60	3.50	43.34	31.98	73.79
速效钾/(mg/kg)	略阳县		7	263.00	185.00	215.00	30.18	14.04
	宁强县		8	370.00	103.00	217.50	88.54	40.71
	勉县		8	263.00	184.00	217.13	33.15	15.27
	南郑县		40	1013.00	180.00	494.45	227.09	45.93
	洋县		10	345.00	222.00	262.80	36.21	13.78
	西乡县		15	344.00	136.00	228.87	56.72	24.78
	总数		88	1013.00	103.00	375.22	214.98	57.29
pH	略阳县		7	8.28	5.67	6.80	0.87	12.79
	宁强县		8	6.73	4.56	5.61	0.81	14.44
	勉县		8	8.20	5.31	6.69	1.11	16.59
	南郑县		40	7.76	4.29	5.71	0.93	16.29
	洋县		10	8.06	6.00	7.51	0.63	8.39
	西乡县		15	7.70	5.01	6.45	0.82	12.71
	总数		88	8.28	4.29	6.21	1.08	17.62

测定项目		区域	样本个数	最大值	最小值	平均数	标准差	变异系数/%
有机质/(g/kg)		略阳县	7	18.30	6.93	11.97	3.71	30.99
		宁强县	8	26.70	8.55	18.61	5.88	31.60
		勉县	8	17.20	7.38	12.13	3.23	26.63
		南郑县	40	47.10	7.66	18.47	7.32	39.63
		洋县	10	20.60	4.54	11.66	4.94	42.37
		西乡县	15	22.40	7.71	14.92	4.58	30.70
		总数	88	47.10	4.54	16.69	6.82	40.86
速效氮/(mg/kg)	略阳县		7	158.26	82.57	137.98	27.48	19.92
	宁强县		8	235.33	104.69	177.20	41.09	23.19
	勉县		8	150.00	91.52	129.62	21.74	16.77
	南郑县		40	364.00	112.85	176.83	43.41	24.55
	洋县		10	161.70	58.49	106.65	34.11	31.98
	西乡县		15	183.72	92.89	143.31	27.14	18.94
	总数		88	364.00	58.49	159.31	46.58	29.24
有效磷/(mg/kg)	略阳县		7	86.80	9.90	34.44	23.99	69.66
	宁强县		8	90.50	10.20	39.36	29.29	74.42
	勉县		8	26.60	5.00	15.81	6.75	42.69
	南郑县		40	129.60	5.60	58.09	32.65	56.21
	洋县		10	21.00	3.50	10.83	4.79	44.23
	西乡县		15	61.60	9.70	30.02	16.21	54.00
	总数		88	129.60	3.50	43.34	31.98	73.79
速效钾/(mg/kg)	略阳县		7	263.00	185.00	215.00	30.18	14.04
	宁强县		8	370.00	103.00	217.50	88.54	40.71
	勉县		8	263.00	184.00	217.13	33.15	15.27
	南郑县		40	1013.00	180.00	494.45	227.09	45.93
	洋县		10	345.00	222.00	262.80	36.21	13.78
	西乡县		15	344.00	136.00	228.87	56.72	24.78
	总数		88	1013.00	103.00	375.22	214.98	57.29
pH	略阳县		7	8.28	5.67	6.80	0.87	12.79
	宁强县		8	6.73	4.56	5.61	0.81	14.44
	勉县		8	8.20	5.31	6.69	1.11	16.59
	南郑县		40	7.76	4.29	5.71	0.93	16.29
	洋县		10	8.06	6.00	7.51	0.63	8.39
	西乡县		15	7.70	5.01	6.45	0.82	12.71
	总数		88	8.28	4.29	6.21	1.08	17.62

分级	区域		1		2		3		4		5		6		7
有机质	略阳县		0.00		0.00		0.00		14.29		42.86		0.00		42.86
	宁强县		0.00		0.00		50.00		37.50		0.00		0.00		12.50
	勉县		0.00		0.00		0.00		25.00		50.00		25.00		0.00
	南郑县		2.50		2.50		27.50		37.50		15.00		10.00		5.00
	洋县		0.00		0.00		10.00		10.00		40.00		0.00		40.00
	西乡县		0.00		0.00		6.67		53.33		6.67		6.67		26.67
	总频率		1.14		1.14		19.32		34.09		20.45		7.95		15.91
速效氮	略阳县		0.00		42.86		42.86		0.00		14.29		0.00		0.00
	宁强县		37.50		50.00		0.00		12.50		0.00		0.00		0.00
	勉县		0.00		12.50		62.50		12.50		12.50		0.00		0.00
	南郑县		22.50		55.00		20.00		2.50		0.00		0.00		0.00
	洋县		0.00		20.00		10.00		30.00		20.00		20.00		0.00
	西乡县		0.00		60.00		13.33		20.00		6.67		0.00		0.00
	总频率		13.64		46.59		21.59		10.23		5.68		2.27		0.00
有效磷	略阳县		28.57		42.86		14.29		0.00		0.00		14.29		0.00
	宁强县		37.50		12.50		25.00		0.00		25.00		0.00		0.00
	勉县		0.00		0		37.50		25.00		25.00		12.50		0.00
	南郑县		65.00		7.50		20.00		5.00		0.00		2.50		0.00
	洋县		0.00		0.00		10.00		0.00		40.00		40.00		10.00
	西乡县		20.00		20.00		33.33		6.67		13.33		6.67		0.00
	总频率		38.64		11.36		22.73		5.68		11.36		9.09		1.14
速效钾	略阳县		57.14		42.86		0.00		0.00		0.00		0.00		0.00
	宁强县		37.50		50.00		0.00		12.50		0.00		0.00		0.00
	勉县		50.00		50.00		0.00		0.00		0.00		0.00		0.00
	南郑县		92.50		7.50		0.00		0.00		0.00		0.00		0.00
	洋县		100.00		0.00		0.00		0.00		0.00		0.00		0.00
	西乡县		53.33		40.00		6.67		0.00		0.00		0.00		0.00
	总频率		75.00		22.73		1.14		1.14		0.00		0.00		0.00
pH	略阳县		42.86		42.86		0.00		14.29		0.00		0.00		0.00
	宁强县		37.50		12.50		25.00		25.00		0.00		0.00		0.00
	勉县		0.00		62.50		37.50		0.00		0.00		0.00		0.00
	南郑县		20.00		27.50		30.00		17.50		5.00		0.00		0.00
	洋县		20.00		20.00		50.00		10.00		0.00		0.00		0.00
	西乡县		33.33		40.00		26.67		0.00		0.00		0.00		0.00
总频率		23.86		31.82		29.55		12.50		2.27		0.00		0.00