Soil Nutrition Content and Distribution of Apple Orchards in Loess Plateau of Eastern Gansu Province

doi:10.11924/j.issn.1000-6850.casb2025-0483

Abstract

Abstract:

Taking the apple orchards in the main apple-producing counties of Jingning, Zhuanglang, Jingchuan and Lingtai in Pingliang City of eastern Gansu Province as the research objects, this study analyzed the distribution characteristics and differences of soil nutrients in the apple orchards in Pingliang. The contents of organic matter, total nitrogen, available phosphorus and available potassium were assayed from 0-100 cm depth soil profile samples of apple orchards in four counties. The results showed that the average content of soil organic matter in 0-100 cm soil layer of orchard in Jingning, Zhuanglang, Jingchuan and Lingtai were 11.61, 11.90, 10.84 and 12.16 g/kg; the average content of total nitrogen was 0.8724, 0.8074, 0.8525 and 1.0234 g/kg, respectively; the average content of available phosphorus was 93.85, 21.18, 33.72, 28.49 mg/kg; and the average content of available potassium was 217.11, 244.71, 296.74, 275.22 mg/kg, respectively. Overall, the content of organic matter and total nitrogen in orchards of four counties was relatively deficient, while the available phosphorus was at a moderately abundant level, and available potassium was at an abundant level. Additionally, the nutrients contents in the upper soil layers were higher than those in the lower layers. Based on the current soil nutrient status in the main apple-producing counties of Pingliang City, it is recommended to increase the application of organic and nitrogen fertilizers in production to improve soil fertility, thereby benefiting apple cultivation.

Key words: Pingliang, apple orchards, soil nutrient, NPK

ZHANG Ning, LI Yajie, WANG Yongdong, LI Lili. Soil Nutrition Content and Distribution of Apple Orchards in Loess Plateau of Eastern Gansu Province[J]. Chinese Agricultural Science Bulletin, 2025, 41(31): 72-78.

Figures/Tables 11

References 25

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分级标准	有机质/(g/kg)	全氮/(g/kg)	速效磷/(mg/kg)	速效钾/(mg/kg)
丰富	>40	>2.0	>40	>200
较丰富	30~40	1.5~2.0	20~40	150~200
中等	20~30	1.0~1.5	10~20	100~150
较缺	10~20	0.75~1.0	5~10	50~100
缺	6~10	0.5~0.75	3~5	30~50
极缺	<6	<0.5	<3	<30

分级标准	有机质/(g/kg)	全氮/(g/kg)	速效磷/(mg/kg)	速效钾/(mg/kg)
丰富	>40	>2.0	>40	>200
较丰富	30~40	1.5~2.0	20~40	150~200
中等	20~30	1.0~1.5	10~20	100~150
较缺	10~20	0.75~1.0	5~10	50~100
缺	6~10	0.5~0.75	3~5	30~50
极缺	<6	<0.5	<3	<30

土层/cm	项目	有机质/(g/kg)	全氮/(g/kg)	速效磷/(mg/kg)	速效钾/(mg/kg)
0~20	平均值	17.85	1.2170	106.73	367.45
	标准差	4.35	0.3635	44.77	168.81
	最小值	12.08	0.8075	45.06	108.99
	最大值	24.73	2.1514	181.91	638.92
	变异系数/%	24.37	29.87	41.95	45.94
20~40	平均值	11.41	0.9038	43.20	229.62
	标准差	1.64	0.1789	22.26	127.58
	最小值	8.75	0.4981	14.83	63.93
	最大值	13.65	1.1055	81.14	515.50
	变异系数/%	14.37	19.79	51.53	55.57

土层/cm	项目	有机质/(g/kg)	全氮/(g/kg)	速效磷/(mg/kg)	速效钾/(mg/kg)
0~20	平均值	17.85	1.2170	106.73	367.45
	标准差	4.35	0.3635	44.77	168.81
	最小值	12.08	0.8075	45.06	108.99
	最大值	24.73	2.1514	181.91	638.92
	变异系数/%	24.37	29.87	41.95	45.94
20~40	平均值	11.41	0.9038	43.20	229.62
	标准差	1.64	0.1789	22.26	127.58
	最小值	8.75	0.4981	14.83	63.93
	最大值	13.65	1.1055	81.14	515.50
	变异系数/%	14.37	19.79	51.53	55.57

土层/cm	项目	有机质/(g/kg)	全氮/(g/kg)	速效磷/(mg/kg)	速效钾/(mg/kg)
0~20	平均值	18.90	1.0471	57.80	430.18
	标准差	4.99	0.2294	33.44	204.57
	最小值	11.48	0.7271	14.62	133.70
	最大值	29.97	1.4420	97.73	703.00
	变异系数/%	26.40	21.91	57.85	47.55
20~40	平均值	12.79	0.8020	30.76	271.81
	标准差	3.82	0.1506	18.03	129.35
	最小值	8.20	0.5674	7.67	90.82
	最大值	21.65	0.9658	65.47	455.90
	变异系数/%	29.87	18.78	58.61	47.59