湖南农业大学学报（自然科学版）2025，Vol.51Issue(5)：66-74,9.DOI:10.13331/j.cnki.jhau.2025.05.009
3种功能型肥料配施对甘薯地连作障碍的缓解作用
Mitigation of continuous cropping obstacles in sweet potato fields with combined application of three functional fertilizers
摘要
Abstract
To alleviate the continuous cropping obstacle in the main sweet potato production areas of Hunan Province,the typical acid soil continuous cropping obstacle land in Hunan Province was selected as the test area and'Xiangshu 203'was selected as the test variety.Three fertilizer factor treatments of special compound fertilizer for sweet potato,microbial fertilizer,and organic fertilizer were set up.For each individual factor,four fertilization levels of 0.0 times,0.5 times,1.0 times,and 2.0 times the recommended fertilization amount were set up,respectively.Single-fertilizer experiments and L16(43)orthogonal fertilizer combined application tests were carried out to compare and analyze the differences in fresh sweet potato yield,dry matter accumulation,soil nutrients,and economic benefits in each test area.The results showed that in the single fertilizer test,the special compound fertilizer produced the highest sweet potato yield,followed by organic fertilizer,while microbial fertilizer demonstrated the lowest yield increase.Applying 600 kg/hm2 of special compound fertilizer yielded 28.17 t/hm2 of the actual fresh sweet potato,and the yields of the plots treated with organic fertilizer and microbial fertilizer at the same nutrient-equivalent application rate were close to this level.In the mixed-fertilizer orthogonal tests,the combining organic and compound fertilizers at an equal fertilizer-efficiency ratio produced the greatest yield increase.The highest fresh sweet potato yield(36.25 t/hm2)occurred with 1 500 kg/hm2 of organic fertilizer plus 600 kg/hm2 of special compound fertilizer,exceeding the 300 kg/hm2 of special compound fertilizer+750 kg/hm2 of organic fertilizer treatment by 22.43%,and the individual applications of special compound fertilizer and organic fertilizer by 28.69%and 31.87%,respectively.In the single-fertilizer tests,the dry matter accumulations of the three fertilizers peaked under the recommended fertilization amounts.In the fertilizer mixed application tests,the dry matter accumulation peaked under the treatment of 600 kg/hm2 of special compound fertilizer+750 kg/hm2 of microbial fertilizer+3 000 kg/hm2 of organic fertilizer.Fertilization had a great influence on soil nutrient contents,mainly manifested as special compound fertilizer significantly increased soil available nutrient contents,organic fertilizer significantly increased soil organic matter content,but microbial fertilizer had little influence on soil nutrient contents.The greatest economic return(20 620 yuan/hm2)was achieved with 600 kg/hm2 of special compound fertilizer+1 500 kg/hm2 of organic fertilizer.In conclusion,the relatively optimal fertilization strategy to alleviate continuous cropping obstacles was 600 kg/hm2 of special compound fertilizer+1 500 kg/hm2 of organic fertilizer.关键词
甘薯/功能型肥料/专用复合肥/微生物菌肥/有机肥/连作障碍/产量/地力提升Key words
sweet potato/functional fertilizer/special compound fertilizer/microbial fertilizer/organic fertilizer/continuous cropping obstacles/yield/soil fertility improvement分类
农业科学引用本文复制引用
康世东,黄艳岚,张超凡,张亚,董芳,董文,项伟,张道微,刘红梅..3种功能型肥料配施对甘薯地连作障碍的缓解作用[J].湖南农业大学学报（自然科学版）,2025,51(5):66-74,9.基金项目
长沙市自然科学基金项目(kq2208156) （kq2208156）
湖南省农业科技创新资金项目(2024CX032) （2024CX032）
湖南省重点研发项目(2023NK2028-02) （2023NK2028-02）
国家甘薯产业技术体系项目(CARS-10-SYZ22) （CARS-10-SYZ22）
