Effect of water and fertilizer regulation on the soil microbial biomass carbon and nitrogen, enzyme activity, and saponin content of Panax notoginseng

作者：Yunfei Tuo, Zhaoyi Wang, Yang Yan Zheng, Xiaolan Shi, Xiangning Liu, Mingjing Ding, Qiliang Yang · 发表于：Agricultural Water Management · 年份：2023 · DOI：10.1016/j.agwat.2023.108145 · 被引用次数：70 · 研究领域：Ginseng Biological Effects and Applications、Polymer-Based Agricultural Enhancements、Agriculture, Soil, Plant Science

Improper irrigation by Panax notoginseng growers can lead to soil consolidation, low fertilizer utilization, and decreased yield quality. In an attempt to provide a scientific and theoretical basis for Panax notoginseng cultivation to improve soil microhabitat and yield quality, field experiment were conducted on three-year-old Panax notoginseng in 2019, 2020, and 2021. The experimental design consisted of two control factors, the amount of irrigation (W) and the amount of fertilizer (F) applied. The irrigation was set to three levels, as W1, W2, and W3, with exact irrigation volumes of 5 mm, 10 mm, and 15 mm. The amount of fertilizer applied was different in all four growth stages. The amount of fertilizer applied according to the four growth stages (rooting stage: seedling stage: flowering stage: fruiting stage), where F1 (360–360–360–360 kg hm−2), F2 (288–360–432–360 kg hm−2), F3 (216–432–432–360 kg hm−2) and F4 (144–576–288–432 kg hm−2). The W and F were randomly combined to form a total of 12 treatments. And a control treatment (CK), was added, and CK was neither irrigated nor fertilization. For obtaining the best treatment results, the TOPSIS method was used to comprehensively evaluate the soil microbial biomass carbon and nitrogen, enzyme activity, physiological growth and saponin content of Panax notoginseng in 13 different water and fertilizer treatments. The results indicated that microbial biomass carbon and nitrogen, urease, sucrase, acid phosphatase and catalase ...