Effects of Organic Materials Combined with Microbial Inoculants on the Remediation of Soil Secondary Salinization Under Greenhouse Condition

doi:10.11924/j.issn.1000-6850.casb2020-0844

Abstract

Abstract:

Soil secondary salinization has become a major issue to restrict the development of agriculture under greenhouse condition. In the present study, a greenhouse experiment was conducted to explore the effects of the two organic materials (cow manure and biochar) combined with microbial inoculants on the remediation of typical soil secondary salinization in Yongqing county of Hebei Province. The treatments were: conventional fertilization without any organic materials as control (CK), conventional fertilization with the application of cow manure (DM), conventional fertilization with the application of biochar (BC), conventional fertilization with the application of both cow manure and microbial inoculant (DM+MI) and conventional fertilization with the application of both biochar and microbial inoculant (BC+MI). The contents of total soil soluble salt and soil salt ions and the height and stem diameter of chili pepper plants were determined to analyze the effects of different organic materials on soil secondary salinization. The results showed that the combination application of organic materials and microbial inoculant improved soil secondary salinization to some extent. Compared with CK, DM+MI obtained the best performance in decrease the content of soil salt, which could decrease the amount of total soil soluble salt by 18.26% and the contents of Na⁺, Ca²⁺ and Mg²⁺ by 24.1%, 18.75% and 24.29%, respectively, followed by DM treatment > BC+MI treatment> BC treatment. The application of organic materials stimulated the growth of chili pepper. At the 10 ^th week, different treatments significantly increased the height and stem diameter of chili pepper by 10.40%~16.00% and 19.50%~21.30%, respectively. The correlation analysis showed that there was a significantly negative correlation between Ca²⁺ and Mg²⁺ and the growth of chili pepper in the secondary salinization greenhouse soil. In conclusion, the application of organic materials with microbial inoculants could reduce the contents of soil salt, alleviate the soil secondary salinization, and thus promote pepper growth.

Key words: organic materials, microbial inoculants, secondary salinization, facility agriculture, remediation effect, pepper

CLC Number:

Mao Xiaoxi, Guan Peibin, Ma Li, Lu Xiujun, Liu Wenju, Li Bowen. Effects of Organic Materials Combined with Microbial Inoculants on the Remediation of Soil Secondary Salinization Under Greenhouse Condition[J]. Chinese Agricultural Science Bulletin, 2021, 37(26): 80-87.

Figures/Tables 8

References 38

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时期	处理	土壤水溶性盐分阳离子
时期	处理	K⁺	Na⁺	Ca²⁺	Mg²⁺
第5周	CK	62.93±0.99a	48.31±4.88a	34.30±2.01a	22.88±3.55a
	牛粪	57.54±2.55a	50.44±4.26a	28.13±1.46b	18.58±1.91a
	生物炭	63.49±8.54a	48.31±1.84a	27.55±2.11b	21.38±1.56a
	牛粪+菌剂	66.05±6.85a	46.55±4.10a	24.52±3.44b	17.97±2.67a
	生物炭+菌剂	62.64±4.48a	49.38±2.82a	32.23±3.87ab	20.73±1.14a
第10周	CK	61.43±4.35a	49.24±0.50a	24.44±1.15a	18.98±0.94a
	牛粪	56.94±3.98ab	48.12±1.01ab	20.00±1.33b	15.72±0.81b
	生物炭	55.81±6.49ab	47.61±0.16ab	26.22±1.22a	18.71±0.70a
	牛粪+菌剂	46.03±3.13b	47.04±0.60b	24.89±1.74a	14.37±0.47b
	生物炭+菌剂	56.10±2.66ab	47.55±0.61ab	26.67±1.63a	19.52±0.70a
第15周	CK	56.80±4.26a	49.37±0.92a	29.78±2.61a	25.21±1.00a
	牛粪	55.71±2.36a	44.63±1.78bc	21.33±1.33bc	23.04±1.02bc
	生物炭	59.79±6.09a	48.09±0.65ab	28.00±2.58ab	24.40±1.00ab
	牛粪+菌剂	56.04±1.69a	42.86±1.26c	18.67±2.83c	21.69±0.85c
	生物炭+菌剂	53.19±3.38a	44.21±1.80bc	22.67±2.39abc	23.32±1.24bc
第20周	CK	49.63±2.56a	47.71±1.08a	21.33±1.26a	20.60±1.24a
	牛粪	48.47±4.43a	39.38±1.56b	19.56±1.81ab	19.52±0.70ab
	生物炭	43.68±2.24a	48.22±0.67a	17.78±1.22b	18.98±0.62b
	牛粪+菌剂	45.86±2.53a	36.20±1.19b	17.33±1.15b	18.98±0.94b
	生物炭+菌剂	46.62±2.03a	49.33±0.45a	19.56±1.39ab	18.16±0.74b

时期	处理	土壤水溶性盐分阳离子
时期	处理	K⁺	Na⁺	Ca²⁺	Mg²⁺
第5周	CK	62.93±0.99a	48.31±4.88a	34.30±2.01a	22.88±3.55a
	牛粪	57.54±2.55a	50.44±4.26a	28.13±1.46b	18.58±1.91a
	生物炭	63.49±8.54a	48.31±1.84a	27.55±2.11b	21.38±1.56a
	牛粪+菌剂	66.05±6.85a	46.55±4.10a	24.52±3.44b	17.97±2.67a
	生物炭+菌剂	62.64±4.48a	49.38±2.82a	32.23±3.87ab	20.73±1.14a
第10周	CK	61.43±4.35a	49.24±0.50a	24.44±1.15a	18.98±0.94a
	牛粪	56.94±3.98ab	48.12±1.01ab	20.00±1.33b	15.72±0.81b
	生物炭	55.81±6.49ab	47.61±0.16ab	26.22±1.22a	18.71±0.70a
	牛粪+菌剂	46.03±3.13b	47.04±0.60b	24.89±1.74a	14.37±0.47b
	生物炭+菌剂	56.10±2.66ab	47.55±0.61ab	26.67±1.63a	19.52±0.70a
第15周	CK	56.80±4.26a	49.37±0.92a	29.78±2.61a	25.21±1.00a
	牛粪	55.71±2.36a	44.63±1.78bc	21.33±1.33bc	23.04±1.02bc
	生物炭	59.79±6.09a	48.09±0.65ab	28.00±2.58ab	24.40±1.00ab
	牛粪+菌剂	56.04±1.69a	42.86±1.26c	18.67±2.83c	21.69±0.85c
	生物炭+菌剂	53.19±3.38a	44.21±1.80bc	22.67±2.39abc	23.32±1.24bc
第20周	CK	49.63±2.56a	47.71±1.08a	21.33±1.26a	20.60±1.24a
	牛粪	48.47±4.43a	39.38±1.56b	19.56±1.81ab	19.52±0.70ab
	生物炭	43.68±2.24a	48.22±0.67a	17.78±1.22b	18.98±0.62b
	牛粪+菌剂	45.86±2.53a	36.20±1.19b	17.33±1.15b	18.98±0.94b
	生物炭+菌剂	46.62±2.03a	49.33±0.45a	19.56±1.39ab	18.16±0.74b

时期	处理	土壤水溶性盐分阴离子
时期	处理	HCO₃^-	Cl^-	SO₄^2-
第5周	CK	293.31±17.17a	37.67±2.22a	341.44±6.97a
	牛粪	292.80±5.50a	36.93±3.69a	336.64±15.26a
	生物炭	254.68±12.42b	36.93±3.69a	331.84±8.91a
	牛粪+菌剂	289.75±0.00ab	31.76±1.48a	335.04±12.70a
	生物炭+菌剂	264.33±12.37ab	40.62±3.69a	331.84±13.10a
第10周	CK	263.32±21.88b	26.14±3.38a	344.32±3.89a
	牛粪	302.97±8.13ab	30.43±0.59a	335.68±3.69a
	生物炭	278.57±12.37ab	26.88±1.29a	346.24±11.10a
	牛粪+菌剂	316.18±5.08a	28.66±0.78a	336.00±17.84a
	生物炭+菌剂	293.82±11.72ab	27.77±1.29a	343.23±4.33a
第15周	CK	290.77±21.52a	26.59±1.84a	352.00±3.56a
	牛粪	246.03±3.67b	22.45±0.30b	347.52±4.43a
	生物炭	262.30±3.05ab	23.78±0.30ab	348.80±0.64a
	牛粪+菌剂	267.38±8.32ab	24.22±0.78ab	348.16±8.39a
	生物炭+菌剂	275.52±12.98ab	25.11±1.07ab	337.92±9.47a
第20周	CK	287.72±6.84a	26.88±0.59a	340.48±3.89a
	牛粪	282.13±4.40a	26.14±0.26a	339.20±6.68a
	生物炭	284.67±13.45a	26.29±1.29a	340.48±10.30a
	牛粪+菌剂	277.04±6.72a	25.55±0.53a	336.64±3.56a
	生物炭+菌剂	289.75±8.80a	26.88±0.78a	342.40±14.25a

时期	处理	土壤水溶性盐分阴离子
时期	处理	HCO₃^-	Cl^-	SO₄^2-
第5周	CK	293.31±17.17a	37.67±2.22a	341.44±6.97a
	牛粪	292.80±5.50a	36.93±3.69a	336.64±15.26a
	生物炭	254.68±12.42b	36.93±3.69a	331.84±8.91a
	牛粪+菌剂	289.75±0.00ab	31.76±1.48a	335.04±12.70a
	生物炭+菌剂	264.33±12.37ab	40.62±3.69a	331.84±13.10a
第10周	CK	263.32±21.88b	26.14±3.38a	344.32±3.89a
	牛粪	302.97±8.13ab	30.43±0.59a	335.68±3.69a
	生物炭	278.57±12.37ab	26.88±1.29a	346.24±11.10a
	牛粪+菌剂	316.18±5.08a	28.66±0.78a	336.00±17.84a
	生物炭+菌剂	293.82±11.72ab	27.77±1.29a	343.23±4.33a
第15周	CK	290.77±21.52a	26.59±1.84a	352.00±3.56a
	牛粪	246.03±3.67b	22.45±0.30b	347.52±4.43a
	生物炭	262.30±3.05ab	23.78±0.30ab	348.80±0.64a
	牛粪+菌剂	267.38±8.32ab	24.22±0.78ab	348.16±8.39a
	生物炭+菌剂	275.52±12.98ab	25.11±1.07ab	337.92±9.47a
第20周	CK	287.72±6.84a	26.88±0.59a	340.48±3.89a
	牛粪	282.13±4.40a	26.14±0.26a	339.20±6.68a
	生物炭	284.67±13.45a	26.29±1.29a	340.48±10.30a
	牛粪+菌剂	277.04±6.72a	25.55±0.53a	336.64±3.56a
	生物炭+菌剂	289.75±8.80a	26.88±0.78a	342.40±14.25a

		EC	盐分总量(TS)	K⁺	Na⁺	Ca²⁺	Mg²⁺	HCO₃^-	Cl^-	SO₄^2-
第5周	株高	0.474	0.104	-0.155	0.071	0.237	0.213	-0.341	0.677^**	-0.033
第5周	茎粗	-0.193	-0.277	-0.432^**	0.415	-0.074	-0.198	0.011	0.302	0.002
第10周	株高	-0.410	-0.549^*	-0.491	-0.566^*	0.265	-0.609^*	0.556^*	0.117	-0.219
第10周	茎粗	0.471	0.081	-0.089	-0.371	0.536^**	0.293	-0.076	-0.296	0.004