Effects of Brassica campestris var. parachinensis-maize rotation on microbial biomass and enzyme activity in rhizosphere soil

doi:10.16178/j.issn.0528-9017.20240822

Abstract

Abstract:

This study took rhizosphere soil as the research object, and set up Brassica campestris var. parachinensis rotation and non-rotation treatments to analyze the changes in soil organic matter content, soil available phosphorus content, soil microbial biomass phosphorus (SMBP) content, soil acid phosphatase activity, and soil microbial biomass carbon (SMBC) content during the rotation cycle. Pearson method was used to analyze the correlation between each indicator. The results showed that the organic matter content, available phosphorus content, SMBP content, and acid phosphatase activity in rhizosphere soil of the Brassica campestris var. parachinensis-maize rotation treatment were significantly (p<0.05) higher than those of the non-rotation treatment during the crop planting period, while the SMBC/SMBP ratio was lower than that of the non-rotation treatment, with a ratio below 30. Soil available phosphorus content was extremely significantly (p<0.01) positively correlated with SMBP content, soil acid phosphatase activity, SMBC content, and soil organic matter content with correlation coefficients of 0.869, 0.815, 0.611, and 0.441, respectively. However, it was significantly negatively correlated with SMBC/SMBP ratio and soil pH value, with correlation coefficients of -0.397 and -0.850, respectively. Rotation significantly activated soil phosphorus cycling, promoted crop utilization of phosphorus in the soil, achieved balanced-nutrient absorption, and balanced agricultural production and soil cultivation.

Key words: rotation, soil phosphorus, soil available phosphorus, soil microbial biomass phosphorus, acid phosphatase

CLC Number:

S154

HU Qiqi, LIANG Jiawei, YU Weimin, WANG Rongping, GONG Beini, LIN Birun. Effects of Brassica campestris var. parachinensis-maize rotation on microbial biomass and enzyme activity in rhizosphere soil[J]. Journal of Zhejiang Agricultural Sciences, 2026, 67(1): 184-193.

Figures/Tables 8

Fig.1 Available phosphorus content in rhizosphere soil under rotation and non-rotation treatments

Fig.2 Microbial biomass phosphorus content in rhizosphere soil under rotation and non-rotation treatments

Fig.3 Acid phosphatase activity in rhizosphere soil under rotation and non-rotation treatments

Fig.4 Microbial biomass carbon content in rhizosphere soil under rotation and non-rotation treatments

Fig.5 The ratio of microbial biomass carbon content and microbial biomass phosphorus content in rhizosphere soil under rotation and non-rotation treatments

Fig.6 Organic matter content in rhizosphere soil under rotation and non-rotation treatments

Fig.7 pH value in rhizosphere soil under rotation and non-rotation treatments

Table 1 Correlation between soil pH value, organic matter content, available phosphorus content, acid phosphatase activity and soil microbial biomass

指标	土壤pH值	土壤有机质含量	土壤有效磷含量	土壤微生物生物量磷(SMBP)含量	酸性磷酸酶活性	土壤微生物生物量碳与土壤微生物生物量磷含量的比值
土壤有机质含量	-0.539^**
土壤有效磷含量	-0.850^**	0.441^**
土壤微生物生物量磷(SMBP)含量	-0.741^**	0.526^**	0.869^**
酸性磷酸酶活性	-0.877^**	0.679^**	0.815^**	0.715^**
土壤微生物生物量碳与土壤微生物生物量磷含量的比值(SMBC/SMBP)	0.273	-0.248	-0.397^*	-0.565^**	-0.275
土壤微生物生物量碳(SMBC)含量	-0.648^**	0.533^**	0.611^**	0.176	0.753^**	0.310

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