干旱地区农业研究2024，Vol.42Issue(1)：76-86,11.DOI:10.7606/j.issn.1000-7601.2024.01.08
水肥调控下土壤碳氮含量、酶活性和三七产量的响应特征研究
Characteristics of soil carbon and nitrogen content,enzyme activity and Panax notoginseng yield under the control of water and fertilizer
摘要
Abstract
Three irrigation levels(5 mm,W1;10 mm,W2;15 mm,W3)and four distinct fertility periods(rooting,seedling,flowering,fruiting)were established,along with varied fertilization ratios(F1∶25％∶25％∶25％∶25％;F2∶20％∶25％∶30％∶25％;F3∶15％∶30％v30％∶25％;F4∶10％∶40％∶20％∶30％)in Yunnan Province in 2018-2021.The entire life cycle under non-irrigated fertilizer treatment served as the control(CK)to investigate effects of different water and fertilization control modes on soil carbon and nitrogen content,en-zyme activity,Panax notoginseng yield,total saponin content and the interrelationships among the indexes were in-vestigated,and the CRITIC-VIKOR method was used for the comprehensive evaluation of the most suitable water and fertilization control modes.The results showed that:irrigation water and fertilizer ratios at different fertility peri-ods had significant effects(P＜0.05)on soil total nitrogen,organic carbon,urease,acid phosphatase,sucrase and catalase activities as well as yield and total saponin content in P.notoginseng at the root increase stage,seedling,flowering and fruiting stages.The total nitrogen content of the W2F3 treatment at the flowering stage was significant-ly higher than that of the other treatments by 7.69％～92.50％compared to that of CK,and the soil organic carbon content of the W1F1 treatment at the flowering stage was significantly higher than that of the other treatments by 5.11％～7.11％.The mean values of soil urease,sucrase and acid phosphatase activities at different irrigation and fertilization levels during the root increase period were increased by 7.20％,19.82％,and 47.44％compared with CK,and peroxidase activity was decreased by 19.16％.Compared with CK,post-harvest water and fertilizer regula-tion treatments of P.notoginseng increased water use efficiency by 53.83％on average,fertilizer bias productivity by 66.30％on average,W2F4 treatment had the highest yield(2 797.25 kg·hm-2),and W2F3 treatment had the highest total saponin content(176.34 mg·g-1).The combined scoring method revealed specific Q values for P.notoginseng:0.03 for the W3F1 treatment during the root increase stage,0.02 for W2F3 during the seedling stage,0.01 for W2F3 during flowering,and 0.02 for W3F2 during fruiting.The analysis identified W3F1 and W3F2 as the optimal irrigation and fertilization schemes for the root increase and fruiting stages,while W2F3 emerged as the op-timal scheme for the seedling and flowering stages.关键词
水肥调控/土壤碳氮含量/土壤酶活性/三七/产量Key words
water and fertilizer regulation/soil carbon and nitrogen content/soil enzymatic activity/Panax notoginseng/yield分类
农业科技引用本文复制引用
石小兰,脱云飞,丁明净,刘香凝,王昭仪,刘艳伟,向萍,杨启良..水肥调控下土壤碳氮含量、酶活性和三七产量的响应特征研究[J].干旱地区农业研究,2024,42(1):76-86,11.基金项目
国家自然科学基金(51979134) （51979134）
2021年度云南省农业联合专项面上项目(202101BD070001-077) （202101BD070001-077）
云南省基础研究重点项目(202201AS070034) （202201AS070034）
四川省栗子坪国家级自然保护区陆生动物生境调查研究(2021ZD0125) （2021ZD0125）
