Effects of soil conditioners on soil properties and vegetable growth in an open-pit coal mine dump

doi:10.3969/j.issn.1000-5641.2025.06.012

Abstract

Abstract:

This study addresses the challenge of water and nutrient deficiencies in the planted soil of spoil dumps in open-pit coal mines by investigating the effectiveness of soil amendments containing a water-retaining agent, organic fertilizer, and microbial inoculant in enhancing soil properties and promoting plant growth. A pot experiment was conducted using Brassica rapa var. chinensis as the model plant to evaluate the effects of different amendment dosages. Key soil parameters were analyzed, including pH, electrical conductivity, alkali-hydrolyzable nitrogen, available phosphorus, available potassium, and organic matter content. Plant growth indicators such as plant height, leaf number, and dry biomass were measured. The findings indicated that applying the water-retaining agent and organic fertilizer significantly improved soil properties and promoted plant growth, whereas the microbial inoculant did not produce statistically significant effects. The optimal combined effect of the amendments on soil properties and plant growth was achieved at a water-retaining agent dosage of 5‰ and an organic fertilizer dosage of 30%.

Key words: ecological restoration, open-pit coal mine, soil conditioner, soil physicochemical properties

CLC Number:

S156.2

Xiaoliang JIAO, Xinxin YU, Heyi GONG, Kun SONG, Liangjun DA. Effects of soil conditioners on soil properties and vegetable growth in an open-pit coal mine dump[J]. J* E* C* N* U* N* S*, 2025, 2025(6): 106-115.

Figures/Tables 8

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材料	品牌/型号	来源	主要成分
保水剂	法国爱森(SNF)	北京金元易生态环境产业股份有限公司	聚丙烯酸盐和聚丙烯酰胺共聚体
有机肥	精制有机肥	上海禾笑有机肥有限公司	酒糟、牛粪等, 总养分 ≥ 5%, 有机质 ≥ 45%
微生物菌剂	Kln-20-1	浙江科罗尼生物环保科技有限公司	乳酸菌、芽孢杆菌、酵母菌、纳豆菌等
小白菜种子	东升小白菜	北京东升种业公司	无

理化指标	变异来源	df	F	p	偏Eta平方
pH	保水剂	2	7.828	0.001	0.225
	有机肥	2	102.159	0	0.791
	菌剂	2	0.812	0.449	0.029
电导率	保水剂	2	5.566	0	0.171
	有机肥	2	195.923	0	0.879
	菌剂	2	1.032	0.183	0.037
有机质	保水剂	2	5.445	0.007	0.168
	有机肥	2	277.741	0	0.911
	菌剂	2	2.457	0.095	0.083
碱解氮	保水剂	2	50.936	0	0.654
	有机肥	2	17.023	0	0.387
	菌剂	2	2.457	0.095	0.083
有效磷	保水剂	2	2.099	0.132	0.072
	有机肥	2	146.381	0	0.844
	菌剂	2	1.912	0.158	0.066
速效钾	保水剂	2	190.116	0	0.876
	有机肥	2	243.172	0	0.900
	菌剂	2	2.591	0.084	0.088

生长指标	变异来源	df	F	p	偏Eta平方
第25天株高	保水剂	2	2.119	0.130	0.073
	有机肥	2	2.980	0.059	0.099
	菌剂	2	0.054	0.947	0.002
第50天株高	保水剂	2	4.938	0.011	0.155
	有机肥	2	18.411	0	0.405
	菌剂	2	2.697	0.076	0.091
第25天叶片数	保水剂	2	28.320	0	0.512
	有机肥	2	0.585	0.561	0.021
	菌剂	2	0.420	0.659	0.015
第50天叶片数	保水剂	2	8.056	0.001	0.230
	有机肥	2	32.191	0	0.544
	菌剂	2	0.040	0.960	0.001
第25天总干重	保水剂	2	11.812	0	0.304
	有机肥	2	0.565	0.572	0.020
	菌剂	2	0.283	0.755	0.010
第50天总干重	保水剂	2	3.749	0.030	0.122
	有机肥	2	15.593	0	0.366
	菌剂	2	0.824	0.444	0.030

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