生态环境学报2026，Vol.35Issue(6)：875-884,10.DOI:10.16258/j.cnki.1674-5906.2026.06.005
减量灌水配施生物炭对麦田土壤团聚体及其碳氮分布的影响
Effects of Reduced Irrigation with Biochar Amendment on Soil Aggregates and Their Carbon-Nitrogen Distribution in Wheat Fields
摘要
Abstract
This study investigates the effects of reduced irrigation combined with biochar application on the stability of soil aggregates and the distribution of carbon and nitrogen within them in wheat fields of the Northern Xinjiang irrigation area,aiming to provide a theoretical basis for farmland soil improvement and water-saving irrigation in the region.A randomized block design was employed,featuring four biochar application rates(B0:0 t·hm-2;B1:10 t·hm-2;B2:20 t·hm-2;B3:30 t·hm-2)and two irrigation levels(W0:4.50×103 m3·hm-2,conventional irrigation;W1:4.05×103 m3·hm-2,reduced irrigation),resulting in a total of eight treatments.The study analyzed the changes in soil aggregates and their carbon and nitrogen contents across different soil layers(0-20 cm,20-40 cm)under the various treatments.The results showed that soil aggregates under all treatments were predominantly in the 0.25-2 mm size class.The highest proportion of 0.25-2 mm aggregates in both soil layers was observed under the combination of reduced irrigation and 20 t·hm-2 biochar application(B2W1),accounting for 46.4％in the 0-20 cm layer and 46.2％in the 20-40 cm layer.The application of 20 t·hm-2 biochar significantly increased(p<0.01)the mean weight diameter,geometric mean diameter,and the content of>0.25 mm macro-aggregates in the 0-20 cm soil layer,with increases of 8.66％,11.7％,and 2.91％,respectively,compared to the treatment without biochar.Furthermore,biochar application significantly increased the organic carbon and total nitrogen contents in all aggregate size classes,with higher contents observed under reduced irrigation compared to conventional irrigation.The carbon-to-nitrogen ratio of soil aggregates>2 mm was also affected.In conclusion,reduced irrigation combined with biochar application can effectively promote the formation of soil macro-aggregates and enhance their stability,while simultaneously improving soil fertility by regulating soil carbon and nitrogen levels.The optimal improvement effect was observed with the application of 20 t·hm-2 of biochar.This study provides a theoretical basis and data support for the rational application of biochar and the implementation of water-saving irrigation in farmland within the Northern Xinjiang irrigation area.关键词
生物炭/减量灌水/土壤团聚体/稳定性/碳氮分布Key words
biochar/reduce irrigation/soil aggregates/stability/carbon and nitrogen distribution分类
农业科技引用本文复制引用
李琴,郑强,杨卫君,张力月,王梓,赵立宁..减量灌水配施生物炭对麦田土壤团聚体及其碳氮分布的影响[J].生态环境学报,2026,35(6):875-884,10.基金项目
国家自然科学基金项目(32260326) （32260326）
新疆现代农业(小麦)产业体系项目(XJARS-01-202623) （小麦）
国家级大学生创新训练项目(202410758030) （202410758030）
