中国马铃薯2026，Vol.40Issue(3)：200-211,12.DOI:10.19918/j.cnki.1672-3635.2026.03.007
苦荞对多年连作马铃薯的土壤修复效应
Soil Remediation Effects of Bitter Buckwheat on Potato Fields Under Continuous Cropping
摘要
Abstract
In the high-altitude,cold mountainous regions of northeastern Yunnan,the phenomenon of long-term potato continuous cropping is prevalent,leading to soil degradation.This study analyzed the comprehensive effects of buckwheat rotation on soil after different durations of potato continuous cropping,with the aim of providing a scientific basis for mitigating soil degradation and improving crop rotation patterns in this region.The experiment used a 5-year potato continuous cropping(CP)treatment as the control,and compared it with treatments involving potato continuous cropping(4 years)-buckwheat(BW)treatment and a potato continuous cropping(3 years)-buckwheat-potato(BW-PT)treatment.By measuring soil physicochemical properties,enzyme activity,and microbial communities,the differences in the effects of the timing of the potato-buckwheat rotation on soil characteristics were elucidated.Compared with the CP treatment,the BW treatment increased soil pH by 6.2%,organic matter content by 1.4%,urease activity by 91.9%,and the relative abundance of Bradyrhizobium by 19.35%;the BW-PT treatment increased soil available iron content by 25.3%,acid phosphatase activity by 14.1%,and the bacterial Shannon index,Sobs index,and ACE index by 2.7%,6.2%,and 5.2%,respectively.Microbial community analysis showed that the BW-PT treatment had a significantly stronger effect on reshaping the structure of soil bacterial and fungal communities than the BW treatment.Specifically,within the fungal community,the abundances of the genera Tausonia and Mortierella decreased by 82.86%and 28.57%,respectively,while the abundances of the genera Boeremia and Leptosphaerulina increased by 144.44%and 125.00%,respectively,promoting soil phosphorus activation and microbial ecosystem stability.The study also clarified the selective regulatory role of the start time of crop rotation on soil functional recovery:short-term crop rotation(3 years)prioritized the restoration of microbial diversity,improving bacterial community structure and phosphorus cycling;while long-term crop rotation(4 years)tended to improve soil chemical properties,effectively alleviating soil acidification and increasing organic matter content.In summary,the potato-buckwheat crop rotation model holds significant potential for promotion in the high-altitude,cold mountainous regions of northeastern Yunnan,where suitable crop species are limited.Its effects on promoting soil fertility and restoring normal microbial community structure could reduce the spread of soil-borne potato diseases and maintain the sustainable use of potato-growing farmland.关键词
马铃薯/苦荞/轮作模式/土壤养分/微生物群落Key words
potato/bitter buckwheat/rotation pattern/soil nutrient/microbial community分类
农业科技引用本文复制引用
刘小云,王玉龙,张锐,白磊,杨芳,周杨哲,李云江,李俊..苦荞对多年连作马铃薯的土壤修复效应[J].中国马铃薯,2026,40(3):200-211,12.基金项目
国家马铃薯产业技术体系建设专项(CARS-09-P15) （CARS-09-P15）
国家重点研发计划项目(2022YFD1601802). （2022YFD1601802）
