中国油料作物学报2024，Vol.46Issue(3)：613-624,12.DOI:10.19802/j.issn.1007-9084.2024095
不同花生轮作模式对土壤团聚体碳组分的影响
Effects of different peanut rotations modes on carbon fractions in soil aggregates
摘要
Abstract
To better evaluate planting mode,effects of different peanut rotation patterns were explored on parti-cle size distribution and carbon content in soil aggregates.From 2017 to 2021,studies were carried out in Yantai,Shandong Province,by using local typical crop modes as contols,including winter wheat-summer maize(WM)and spring peanut(CP).Other peanut rotation patterns were set up,namely,WP(winter wheat-summer peanut rotation),PWM(spring peanut → winter wheat-summer maize rotation),and WPWM(winter wheat-summer peanut → winter wheat-summer maize rotation).Effects of planting patterns were investigated on soil aggregate composition and soil organic carbon content,dissolved organic carbon content,and microbial biomass carbon in the aggregates.Results showed that compared with CP mode,the percentage content of 1-2 mm aggregates in 0-40 cm soil layer under PWM and WPWM modes was significantly increased by 14.75-21.25 and 12.47-16.17 percentage points,respec-tively,and WPWM mode was more conducive to increase average weight diameter of soil aggregates.Soil organic carbon content of aggregates in 0-40 cm soil layer under WPWM mode was significantly higher than that under CP mode,except for the particle size of 0.25-0.5 mm.The contribution rate of soil organic carbon in 0-20 cm soil layer of 1-2 mm and<1 mm in WP and WPWM mode was significantly higher than those in CP.Under WPWM mode,dissolved organic carbon content of>5 mm,0.5-1 mm and<0.25 mm aggregates in 0-20 cm soil layer were signifi-cantly increased by 50.75%-81.18%,100.12%-120.12%and 69.44%-90.07%compared with the 2 controls(CP and WM),respectively.In WPWM mode,microbial biomass carbon content of 0-40 cm soil layer aggregates in-creased the most than those of the controls(CP and WM).Compared with the controls in 20-40 cm soil layer,the contribution rate of microbial biomass carbon in 1-2 mm aggregates was significantly increased under PWM,WP and WPWM modes.Soil organic carbon was significantly correlated with dissolved organic carbon,microbial bio-mass carbon,and dissolved organic carbon with microbial biomass carbon in aggregates of 2-5 mm,1-2 mm,and 0.5-1 mm.In general,WPWM increased mean weight diameter in 0-40 cm soil layer,the content of fine and large aggregates(1-2 mm),and the content and contribution rate of soil organic carbon,dissolved organic carbon and mi-crobial biomass carbon in 1-2 mm aggregates,which would improve soil structure and be more in line with the needs of green and low-carbon development.关键词
花生轮作/土壤团聚体/有机碳/可溶性有机碳/微生物量碳Key words
peanut rotation/soil aggregate/organic carbon/soluble organic carbon/microbial biomass carbon分类
农业科技引用本文复制引用
李菁,邹晓霞,张广彩,杨力剑,梁兆君,于博洋,张甜,司彤,于晓娜,张晓军..不同花生轮作模式对土壤团聚体碳组分的影响[J].中国油料作物学报,2024,46(3):613-624,12.基金项目
财政部和农业农村部:国家现代农业产业技术体系(CARS-13) （CARS-13）
