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首页> 美国卫生研究院文献>Heliyon >Microbial biomass carbon and enzyme activities as influenced by tillage crop rotation and residue management in a sweet sorghum cropping system in marginal soils of South Africa
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Microbial biomass carbon and enzyme activities as influenced by tillage crop rotation and residue management in a sweet sorghum cropping system in marginal soils of South Africa

机译：微生物生物量碳和酶活性受到南非边缘土壤甜点高粱作物系统中耕作作物旋转和残留管理的影响

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Questions on sustainable and appropriate cropping systems for bioenergy sweet sorghum in the smallholder farming sector still exist. Therefore, a short-term experiment was carried out to study the influence of management on microbial biomass carbon (MBC), β-glucosidase, acid phosphatase, and urease activities in a sweet sorghum cropping system in South Africa. Tillage [no-till (NT) and conventional tillage (CT)], rotation [sorghum-vetch-sorghum (S-V-S) and sorghum-fallow-sorghum (S-F-S)] and residue retention [0%, 15% and 30%] were evaluated. Tillage× rotation× residue management interaction influenced (P < 0.05) MBC whilst crop rotation residue influenced (P < 0.05) β-glucosidase. Tillage affected β-glucosidase (P < 0.05), acid phosphatase (P < 0.001), and urease enzyme (P < 0.01) while crop rotation only influenced acid phosphatase (P < 0.01). Residue retention affected acid phosphatase (P < 0.001) and urease enzyme (P < 0.001). NT + S-V-S+30% interaction resulted in the highest MBC content compared to CT + S-F-S+0%. NT+30% enhanced β-glucosidase activity, S-V-S enhanced acid phosphatase compared to S-F-S. MBC and enzyme activities were positively correlated with each other. Tillage and residue management were the main factors influencing soil biological indicators under bioenergy sweet sorghum in South African marginal soils in the short-term. Soil biological indicators were higher under NT and 30% residue retention respectively. NT + S-V-S+30% was a better treatment combination to enhance soil quality under bioenergy sweet sorghum in South African marginal soils.
机译：关于小农农业部门的生物能源甜高粱可持续和适当种植系统的问题仍然存在。因此，进行了短期实验，以研究管理对微生物生物量碳（MBC），β-葡糖苷酶，酸性磷酸酶和泌尿高粱种植系统中的脲酶活性的影响。耕作[无（NT）和常规耕作（CT）]，旋转[高粱 - 升温（SVS）和高粱 - 休耕 - 高粱（SFS）]和残留物保留[0％，15％和30％]是评估。耕作×旋转×残留管理相互作用影响（P <0.05）MBC，而作物旋转残留物影响（P <0.05）β-葡糖苷酶。耕作受影响的β-葡糖苷酶（P <0.05），酸性磷酸酶（P <0.001）和尿素酶（P <0.01），而作物旋转仅受影响的酸性磷酸酶（P <0.01）。残留物保留影响酸性磷酸酶（P <0.001）和脲酶（P <0.001）。与CT + S-F-S + 0％相比，NT + S-V-S + 30％相互作用导致最高MBC含量。与S-F-S相比，NT + 30％增强β-葡糖苷酶活性，S-V-S增强酸性磷酸酶。 MBC和酶活性彼此正相关。耕作和残留物管理是在短期内影响南非边际土壤中生物能源甜高粱下土壤生物指标的主要因素。土壤生物学指标分别在NT和30％的残留物保留下较高。 NT + S-V-S + 30％是更好的治疗组合，以提高南非边际土壤生物能源甜高粱下的土壤质量。

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