生物资源2026，Vol.48Issue(1)：59-67,9.DOI:10.14188/j.ajsh.20251124001
植物废弃物有机肥对石漠化坡地土壤质量及植被恢复的影响
Effect of plant waste-derived organic fertilizer on soil quality and vegetation restoration in rocky desertification sloping lands
摘要
Abstract
To investigate the effects of plant waste-derived organic fertilizer on soil quality and vegetation restoration during the ecological rehabilitation of karst rocky desertification slopes,and to determine the proportion of organic fer-tilizer added and the application effect under different slope gradients,a study was conducted involving both pot and field experiments on rocky desertification slopes in Qianxi,Guizhou Province.Each experiment comprised 5 test groupes.The pot experiment included a control(CK)group and groupes with organic fertilizer addition ratios of 10%(T1),20%(T2),35%(T3),and 55%(T4).The effects of pot treatments on soil properties and the growth of alfalfa(Medicago sativa)and ryegrass(Lolium perenne)were studied.Based on the pot experiment results,the optimal organic fertilizer addition ratio of 35%was selected for the field experiment.The field experiment involved 5 slope gradient groupes:1°-5°(T-5),6°-10°(T-10),11°-15°(T-15),16°-20°(T-20),and 21°-30°(T-30).This experiment aimed to study the differential effects of organic fertilizer(at 35%)on soil properties and spontaneous vegetation regeneration across these slope gradients.The results indicated that in the pot experiment,all organic fertilizer treatments significantly im-proved soil physicochemical properties,the growth of alfalfa and ryegrass,and plant regeneration compared to the CK group(P<0.05).However,for most indicators,no significant further increase was observed when the addition ratio ex-ceeded 35%(T3),suggesting that 35%is the optimal addition ratio.In the field experiment,the addition of organic fer-tilizer(35%)significantly enhanced soil quality and promoted vegetation restoration across all slope gradients.However,for the two treatment groupes on slopes steeper than 15°(T-20 and T-30),the differences in improvement were not sig-nificant(P>0.05),and the magnitude of change in all measured indicators was significantly lower than that in the other three treatment groupes(T-5,T-10,T-15).This indicates that the effectiveness of organic fertilizer is greater on rocky desertification slopes with gradients below 15°.In conclusion,plant waste-derived organic fertilizer,as a fertilizer source for soil ecological restoration on karst rocky desertification slopes,significantly improves soil physical structure and nu-trient content,while promoting the spontaneous regeneration of vegetation.However,its effectiveness is constrained by nutrient addition ratios and slope conditions.关键词
石漠化/有机肥/土壤修复/土壤质量/植被恢复Key words
rocky desertification/organic fertilizer/soil restoration/soil quality/vegetation recovery分类
农业科技引用本文复制引用
赵江,龚记熠,李欲轲,唐明,张习敏,文治瑞,乙引..植物废弃物有机肥对石漠化坡地土壤质量及植被恢复的影响[J].生物资源,2026,48(1):59-67,9.基金项目
贵州省重大科技成果转化项目"喀斯特石漠化生态恢复技术集成与示范"(黔科合重点2022[010]) （黔科合重点2022[010]）
贵州省教育厅"揭榜挂帅"科技攻关项目"喀斯特石漠化水肥耦合与生物多样性恢复"(黔教技[2023]004号) （黔教技[2023]004号）
