调理剂与有机肥配施对酸性稻田土壤性质及水稻产量的影响

doi:10.3864/j.issn.0578-1752.2026.14.010

Abstract

Abstract:

【Objective】The effects of application of soil conditioners and their combination with organic fertilizers at a low addition rate on soil acidity, nutrients, enzyme activity and rice yield following three successive years were investigated in this study, so as to provide a theoretical basis for soil improvement in acid red soil in Southern China.【Method】A field experiment was conducted with eight treatments: a control without fertilization and soil conditioner (CK0), traditional fertilization (CK1), application of mineral soil conditioner (0.75 t·hm^-2) with traditional fertilization (M), organic soil conditioner (1.2 t·hm^-2) with traditional fertilization (O), and combined application of mineral and organic soil conditioners with traditional fertilization (MO), as well as co-application of M, O and MO with organic fertilizer (4.5 t·hm^-2) under traditional fertilization (MF, OF and MOF). The soil conditioners and organic fertilizer were applied once per year. After consecutive application for 3 years, rice yield was measured and soil chemical properties and soil enzyme activity were analyzed.【Result】Compared with CK0 and CK1, all the treatments significantly increased soil pH, respectively, and significantly reduced soil exchangeable H⁺, exchangeable Al³⁺, and exchangeable acid concentrations. Compared with CK1, MF, OF, and MOF treatments significantly increased soil organic matter content, while MOF treatment also increased available phosphorus (P) and potassium (K) content, microbial biomass carbon and nitrogen and rice yield. Compared with the CK1, the application of MF and OF significantly reduced the activity of acid phosphatase, while MOF significantly reduced the vector angle, indicating a decreased microbial phosphorus (P) limitation. Soil exchangeable H⁺, exchangeable Al³⁺, and exchangeable acid concentrations had positive correlations with the activity of acid phosphatase, while soil organic matter, pH, available N, microbial biomass carbon, available P had negative correlations with it. Redundant analysis indicated that decrease in soil potential acidity and increase in soil nutrients were the key drivers of soil enzyme activities. Correlation analysis suggested that rice yield was significantly positively correlated with soil organic matter, available N, and available P, and significantly negatively correlated with exchangeable acids and the vector angle. Structural equation modeling further indicated that variation in soil organic matter and exchangeable acid changes rice yield via microbial biomass carbon and P limitation, which explained 62% variation in rice yield. Soil organic matter had a significant positive effect on rice yield, while the exchangeable acid concentration and vector angle had negative effects on it.【Conclusion】The combined application of mineral or organic soil conditioners with organic fertilizer following three successive years reduced soil acidity, improved soil organic matter and nutrient availability and mitigated microbial P limitation. The combination of the three amendments had the best improvement on rice yield, thereby can be recognized as an effective way for reducing acidity and improving soil fertility in red soil in the south China.

Key words: soil acidification, organic fertilizer, soil conditioner, rice yield, enzyme activity

YE JiaYi, WU QiFeng, WANG JiaLin, ZHOU Yan, MA XiaoMin, LIANG ChenFei, QIN Hua, CHEN JunHui. Effects of Soil Conditioners and Organic Fertilizer Application on Enzyme Activity and Rice Yield in an Acid Paddy Soil[J].Scientia Agricultura Sinica, 2026, 59(14): 3121-3131.

Figures/Tables 7

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References 34

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	pH	有机质 SOM (%)	全氮 N (%)	全磷 P₂O₅(%)	全钾 K₂O (%)	氧化钙 CaO (%)	氧化镁 MgO (%)	氧化硅 SiO₂(%)
矿物源调理剂Mineral conditioner	10.5	—	0.14	0.05	0.12	40.0	10.5	25.5
有机源调理剂Organic conditioner	10.0	20.0	0.36	0.32	0.10	20.0	8.0	—
有机肥Organic fertilizer	7.7	40.0	2.50	1.80	1.50	—	—	—

处理 Treatment		pH	有机质 SOM (g·kg^-1)			碱解氮 AN (mg·kg^-1)		有效磷 AP (mg·kg^-1)		速效钾 AK (mg·kg^-1)
CK0		5.37±0.08c	22.21±1.92b			92.08±16.33b		13.35±1.83d		75.67±10.50c
CK1		5.67±0.11c	23.24±1.91b			102.28±14.99ab		16.29±1.96cd		94.67±12.22bc
M		6.24±0.32b	26.11±3.85ab			108.19±18.57ab		17.20±1.32bcd		105.33±13.01ab
O		6.64±0.22ab	27.23±3.40ab			110.16±18.80ab		18.35±4.57abcd		108.67±17.01ab
MO		6.63±0.42ab	27.66±2.99ab			117.58±5.33ab		24.19±4.27ab		117.67±18.58ab
MF		6.85±0.12a	28.98±2.36a			126.32±19.93a		22.10±4.50abc		108.33±21.50ab
OF		6.71±0.22ab	29.36±3.04a			119.06±21.21ab		23.36±3.80abc		121.00±11.79ab
MOF		6.90±0.40a	30.22±3.18a			130.56±14.09a		24.79±5.96a		128.33±8.39a
处理Treatment	微生物量碳 MBC (mg·kg^-1)			微生物量氮 MBN (mg·kg^-1)	交换性酸 EA (cmol·kg^-1)		交换性H⁺ EH (cmol·kg^-1)		交换性Al³⁺ EAl (cmol·kg^-1)		水稻产量 Rice yield (t·hm^-2)
CK0	246.51±90.36d			12.65±3.79e	0.80±0.07a		0.45±0.03a		0.35±0.05a		8.50±0.46c
CK1	293.11±20.98cd			19.14±4.69de	0.40±0.06b		0.16±0.03b		0.24±0.04b		9.22±0.66bc
M	299.95±49.50cd			28.09±5.11bc	0.11±0.06c		0.07±0.04c		0.04±0.02c		10.05±0.99ab
O	362.00±103.02bcd			29.56±3.32abc	0.08±0.03c		0.04±0.01c		0.04±0.03c		10.11±0.75ab
MO	481.86±99.96ab			32.32±2.01ab	0.10±0.06c		0.06±0.04c		0.05±0.03c		10.56±0.79ab
MF	497.06±43.94ab			23.15±6.12cd	0.05±0.02c		0.03±0.02c		0.02±0.01c		10.25±0.75ab
OF	397.91±42.25bc			25.53±1.23bcd	0.09±0.03c		0.07±0.02c		0.02±0.01c		10.64±0.56ab
MOF	599.62±95.37a			36.43±3.23a	0.06±0.03c		0.03±0.03c		0.03±0.02c		11.11±0.99a

处理 Treatment	β-葡萄糖苷酶 BG (nmol·g^-1·h^-1)	纤维二糖水解酶 CB (nmol·g^-1·h^-1)	β-N-乙酰氨基葡萄糖苷酶NAG (nmol·g^-1·h^-1)	亮氨酸氨基酞酶 LAP (nmol·g^-1·h^-1)	酸性磷酸酶 PHOS (nmol·g^-1·h^-1)
CK0	98.82±8.17a	6.52±1.03a	31.23±4.70a	8.42±0.52a	156.60±6.92a
CK1	82.22±7.50bc	4.69±0.59b	33.64±12.34a	7.57±1.01ab	132.28±2.50bc
M	81.79±10.04bc	4.71±0.78b	35.03±11.65a	7.66±0.92ab	130.95±12.77bc
O	82.35±8.41bc	4.58±0.66b	35.64±9.66a	7.21±0.88ab	123.37±9.91bc
MO	97.38±6.69ab	5.07±1.00b	40.48±7.84a	7.34±0.62ab	136.97±4.90b
MF	74.21±8.78c	4.21±0.48b	39.66±7.96a	6.63±0.65b	109.00±5.99de
OF	76.80±9.89c	3.97±0.92b	41.99±11.88a	6.31±0.69b	104.57±4.76e
MOF	95.46±9.17ab	4.37±0.85b	42.97±9.55a	6.72±0.34b	119.86±9.60cd
处理 Treatment	酶碳氮比 Enzyme C/N	酶碳磷比 Enzyme C/P	酶氮磷比 Enzyme N/P	向量长度 Vector length	向量角度 Vector angle (°)
CK0	1.27±0.06a	0.92±0.02b	0.73±0.03b	0.83±0.03a	61.03±1.50c
CK1	1.22±0.10a	0.91±0.02b	0.75±0.07ab	0.79±0.05a	59.81±3.04bc
M	1.20±0.05a	0.91±0.02b	0.77±0.05ab	0.78±0.02a	59.41±2.48ab
O	1.20±0.09a	0.93±0.03ab	0.78±0.04ab	0.79±0.07a	58.31±0.52ab
MO	1.20±0.05a	0.94±0.01ab	0.78±0.04ab	0.81±0.03a	57.89±1.74ab
MF	1.14±0.06a	0.93±0.02ab	0.81±0.03ab	0.76±0.05a	56.42±1.28ab
OF	1.14±0.11a	0.94±0.02ab	0.83±0.06a	0.76±0.08a	55.11±2.60ab
MOF	1.18±0.04a	0.96±0.00a	0.81±0.03ab	0.81±0.02a	55.83±1.12a

Effects of Soil Conditioners and Organic Fertilizer Application on Enzyme Activity and Rice Yield in an Acid Paddy Soil

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