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OA
Effect of plant waste-derived organic fertilizer on soil quality and vegetation restoration in rocky desertification sloping lands
为探明植物废弃物有机肥在石漠化坡地生态修复中对土壤质量和植被恢复的影响,明确有机肥添加比例,以及不同坡度条件下的运用效果,在贵州黔西石漠化坡地设置盆栽和大田两种场景,各设置5个处理.盆栽实验设置对照(CK)组和有机肥添加组,比例分别为 10%(T1)、20%(T2)、35%(T3)、55%(T4),研究不同处理对盆栽试验下土壤性质、紫花苜蓿(Medicago sativa)、黑麦草(Lolium perenne)生长的影响;大田实验采用盆栽筛选最佳有机肥比例35%作为添加量,设置1°～5°(T-5)、6°～10°(T-10)、11°～15°(T-15)、16°～20°(T-20)、21°～30°(T-30)5个处理,研究不同坡度下有机肥对土壤性质及植物自然恢复的影响差异.结果表明,盆栽实验下不同有机肥添加处理对土壤理化性质、紫花苜蓿、黑麦草生长及植物自然恢复较对照组均有显著改善(P<0.05),但是添加量超过35%(T3)后,大部分指标并没有出现显著性增加,表明35%有机肥添加量最佳.大田实验中有机肥添加(35%)在不同坡度下均能显著改善土壤质量并促进植被恢复,但是在坡度超过 15°后的两组(T-20、T-30)处理中差异并不显著(P>0.05),且各项指标变化量显著低于其他3组处理,表明有机肥在坡度低于15°的石漠化坡地效果更好.综上,植物废弃物有机肥作为石漠化坡地土壤生态修复的肥料来源,对土壤物理结构、养分含量具有显著改善效果,同时促进植被的自然恢复,但受到养分添加比例和坡度条件的限制.
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.
赵江;龚记熠;李欲轲;唐明;张习敏;文治瑞;乙引
贵州师范大学 生命科学学院,贵州 贵阳 550025贵州师范大学 生命科学学院,贵州 贵阳 550025||贵州师范大学 喀斯特地区碳中和教育部工程研究中心,贵州 贵阳 550025贵州师范大学 生命科学学院,贵州 贵阳 550025||贵州师范大学 喀斯特地区碳中和教育部工程研究中心,贵州 贵阳 550025贵州师范大学 生命科学学院,贵州 贵阳 550025||贵州师范大学 喀斯特地区碳中和教育部工程研究中心,贵州 贵阳 550025贵州师范大学 生命科学学院,贵州 贵阳 550025||贵州师范大学 喀斯特地区碳中和教育部工程研究中心,贵州 贵阳 550025贵州师范大学 生命科学学院,贵州 贵阳 550025||贵州师范大学 喀斯特地区碳中和教育部工程研究中心,贵州 贵阳 550025贵州师范大学 生命科学学院,贵州 贵阳 550025||贵州师范大学 喀斯特地区碳中和教育部工程研究中心,贵州 贵阳 550025
农业科技
石漠化有机肥土壤修复土壤质量植被恢复
rocky desertificationorganic fertilizersoil restorationsoil qualityvegetation recovery
《生物资源》 2026 (1)
59-67,9
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])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)
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