Assessment of Soil Fertility in the Mango Orchards of Panzhihua, Sichuan, China

doi:10.3969/j.issn.1000-2561.2020.01.001

Abstract

Abstract:

The soil fertility of the mango orchard in Panzhihua, Sichuan, China was evaluated to provide a scientific basis for the management of the fruit in the area. The soil samples in the depth 0-40 cm in 43 mango orchards were collected to determine the soil pH, contents of organic soil matter, available nutrients and micronutrients and analyze the data of the soil nutrients. The results showed that the variable coefficient of 13 nutrient contents was 0.13-0.75 in the region, and the variation was moderate. Statistical analysis revealed the soil fertility in the 43 orchards was sufficient to meet the required accuracy of 20% relative error under 90% confidence level. Principal component analysis, membership function and the radar plot were used to assess the single factor fertility. It showed that pH, available nitrogen, available phosphorus, available Fe and available Zn were the limiting factors for the soil fertility quality in the study area. The soil integrated fertility index in the study area was 0.25-0.93 with an average value of 0.55. But the difference of IFI among the orchards was significant.

Key words: mango orchard, Panzhihua, soil fertility, fertility evaluation

CLC Number:

S158

LIU Bin,WANG Songbiao,LI Xin,SU Muqing,MA Haiyang,WU Hongxia,ZHOU Yigang,MA Xiaowei. Assessment of Soil Fertility in the Mango Orchards of Panzhihua, Sichuan, China[J]. Chinese Journal of Tropical Crops, 2020, 41(1): 1-6.

Figures/Tables 6

References 14

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指标 Index	样本数 Samples point	极差 Range	最小值 Minimum	最大值 Maximum	平均值 Average	标准差 Standard deviation	变异系数 Coefficient variation
pH	43	3.31	5.07	8.38	6.60	0.83	0.13
AK/(mg∙kg^-1)	43	121.00	20.50	141.50	72.42	27.83	0.38
AP/(mg∙kg^-1)	43	28.32	3.71	32.03	11.98	7.03	0.59
AN/(mg∙kg^-1)	43	87.54	14.85	102.39	57.81	22.41	0.39
OM/%	43	2.37	0.33	2.70	1.05	0.54	0.51
TN/%	43	0.89	0.09	0.98	0.65	0.22	0.33
Ca/(mg∙kg^-1)	43	222.61	30.69	253.30	143.60	58.47	0.41
Mg/(mg∙kg^-1)	43	15.65	4.55	20.20	9.85	2.86	0.29
Cu/(mg∙kg^-1)	43	3.33	0.31	3.64	1.25	0.81	0.65
Fe/(mg∙kg^-1)	43	53.63	6.32	59.95	26.39	19.66	0.75
Zn/(mg∙kg^-1)	43	5.14	0.21	5.35	2.27	1.37	0.60
Mn/(mg∙kg^-1)	43	87.45	12.44	99.89	46.89	28.05	0.60
B/(mg∙kg^-1)	43	465.00	131.00	596.00	350.35	122.78	0.35

指标 Index	样本数 Samples point	极差 Range	最小值 Minimum	最大值 Maximum	平均值 Average	标准差 Standard deviation	变异系数 Coefficient variation
pH	43	3.31	5.07	8.38	6.60	0.83	0.13
AK/(mg∙kg^-1)	43	121.00	20.50	141.50	72.42	27.83	0.38
AP/(mg∙kg^-1)	43	28.32	3.71	32.03	11.98	7.03	0.59
AN/(mg∙kg^-1)	43	87.54	14.85	102.39	57.81	22.41	0.39
OM/%	43	2.37	0.33	2.70	1.05	0.54	0.51
TN/%	43	0.89	0.09	0.98	0.65	0.22	0.33
Ca/(mg∙kg^-1)	43	222.61	30.69	253.30	143.60	58.47	0.41
Mg/(mg∙kg^-1)	43	15.65	4.55	20.20	9.85	2.86	0.29
Cu/(mg∙kg^-1)	43	3.33	0.31	3.64	1.25	0.81	0.65
Fe/(mg∙kg^-1)	43	53.63	6.32	59.95	26.39	19.66	0.75
Zn/(mg∙kg^-1)	43	5.14	0.21	5.35	2.27	1.37	0.60
Mn/(mg∙kg^-1)	43	87.45	12.44	99.89	46.89	28.05	0.60
B/(mg∙kg^-1)	43	465.00	131.00	596.00	350.35	122.78	0.35

指标 Index	95%置信水平的相对误差 Relative error of 95% confidence level				90%置信水平的相对误差 Relative error of 90% confidence level
指标 Index	5%	10%	15%	20%	5%	10%	15%	20%
pH	25	6	3	2	18	5	2	1
AK	236	59	26	15	171	43	19	11
AP	551	138	61	34	398	100	44	25
AN	240	60	27	15	174	43	19	11
OM	423	106	47	26	306	76	34	19
TN	183	46	20	11	132	33	15	8
Ca	265	66	29	17	192	48	21	12
Mg	135	34	15	8	97	24	11	6
Cu	672	168	75	42	485	121	54	30
Fe	888	222	99	55	642	160	71	40
Zn	583	146	65	36	421	105	47	26
Mn	573	143	64	36	414	103	46	26
B	197	49	22	12	142	35	16	9

指标 Index	95%置信水平的相对误差 Relative error of 95% confidence level				90%置信水平的相对误差 Relative error of 90% confidence level
指标 Index	5%	10%	15%	20%	5%	10%	15%	20%
pH	25	6	3	2	18	5	2	1
AK	236	59	26	15	171	43	19	11
AP	551	138	61	34	398	100	44	25
AN	240	60	27	15	174	43	19	11
OM	423	106	47	26	306	76	34	19
TN	183	46	20	11	132	33	15	8
Ca	265	66	29	17	192	48	21	12
Mg	135	34	15	8	97	24	11	6
Cu	672	168	75	42	485	121	54	30
Fe	888	222	99	55	642	160	71	40
Zn	583	146	65	36	421	105	47	26
Mn	573	143	64	36	414	103	46	26
B	197	49	22	12	142	35	16	9

土壤属性 Soil quality	分组 Clade	主成分Principal components				公因子方差 Communality	权重 Weight	矢量常模值Norm value
土壤属性 Soil quality	分组 Clade	1	2	3	4	公因子方差 Communality	权重 Weight	矢量常模值Norm value
AK	1	0.506	-0.461	-0.438	-0.234	0.714	0.080	1.336
AN	1	0.746	-0.400	-0.151	0.033	0.741	0.083	1.492
OM	1	0.518	-0.435	-0.067	-0.110	0.474	0.053	1.189
TN	1	0.727	-0.191	-0.228	0.209	0.660	0.074	1.366
Cu	1	0.639	0.338	0.257	-0.010	0.589	0.066	1.302
Zn	1	0.631	0.427	0.380	-0.172	0.755	0.085	1.425
Fe	2	0.510	0.682	0.252	-0.063	0.792	0.089	1.514
B	2	0.015	0.730	-0.126	0.349	0.670	0.075	1.334
Mn	2	0.346	0.766	-0.128	-0.266	0.793	0.089	1.498
pH	3	0.051	-0.325	0.747	0.156	0.691	0.078	1.100
Ca	3	0.090	-0.487	0.581	0.244	0.643	0.072	1.153
Mg	4	-0.112	0.355	-0.197	0.751	0.741	0.083	1.103
AP	4	0.500	-0.227	-0.129	0.575	0.649	0.073	1.175
特征值		3.068	2.998	1.529	1.316
累积贡献率/%		23.600	46.660	58.420	68.550