Crops ›› 2026, Vol. 42 ›› Issue (1): 249-256.doi: 10.16035/j.issn.1001-7283.2026.01.031

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Effects of Density and Nitrogen Application Level on Growth and Yield of Salvia prionitis Hance

Wei Chunlan1,2(), Wang Manlian2(), Tang Hui2, Liu Baoyu2, Zhang Xiujiao2, Li Hong2   

  1. 1School of Life Sciences, Guangxi Normal University, Guilin 541006, Guangxi, China
    2Guangxi Institute of Botany, Chinese Academy of Sciences, Guilin 541006, Guangxi, China
  • Received:2024-09-03 Revised:2024-11-04 Online:2026-02-15 Published:2026-02-10

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Abstract:

A field experiment was conducted to investigate the effects of planting densities and nitrogen application levels on the growth, biomass allocation and yields of Salvia prionitis Hance. Three planting density levels, high density (666 666 plant/ha), medium density (200 000 plant/ha), and low density (95 238 plant/ha); and three fertilization levels [no nitrogen application, low nitrogen (22.5 g/m2) and high nitrogen (45 g/m2)] were set. The results showed that both the density and nitrogen level significantly affected plant size, biomass allocation and yield of S.prionitis. However, the interaction effect only extremely significantly affected the parameters related to biomass allocation. In general, nitrogen application increased the plant height, number of flower stalks, and number of primary branches flower stalks of S.prionitis under all planting densities, and leaf length, leaf width, and plant height of the two low density treatment were greater than those of the high density treatment under all nitrogen levels. Nitrogen level did not significantly affect the root biomass ratio and root- shoot ratio of S.prionitis at medium density treatment, while the root biomass ratio and root-shoot ratio at low and high densities were significantly reduced with the increasing of nitrogen application. Under each densities, the root biomass, supporting structure biomass, total biomass, whole plant yield and root yield of S.prionitis were the greatest in the low nitrogen treatment, then followed by the high nitrogen treatment. under every nitrogen application levels, the root biomass, supporting structure biomass and total biomass of S.prionitis increased significantly with the decreasing of density, However, the whole plant yield and root yield increased significantly with the decreasing of density. In all treatments, whole plant yield and root yield of S.prionitis were the greatest at high density (666 666 plant/ha) with low nitrogen level (22.5 g/m2 pure nitrogen, urea).

Key words: Growth, Biomass, Biomass allocation, Salvia prionitis Hance

Table 1

Two-way analysis of variance of plant size, biomass allocation, and yield of S.prionitis"

分组Group 变量Variable 密度Density 氮水平Nitrogen level 密度×氮水平Density×Nitrogen level
植株大小Plant size 平均冠幅 14.944*** 10.482** 0.393
株高 4.301* 4.597* 0.402
花苔数 1.859 7.028* 0.004
花苔一级分枝数 17.411*** 21.064*** 0.918
叶宽 5.704* 6.662* 1.111
叶长 9.961** 3.078 0.825
生物量Biomass 根生物量 345.092*** 16.269*** 0.847
支持结构生物量 609.414*** 27.740*** 0.740
叶生物量 24.929*** 24.555*** 1.081
总生物量 269.535*** 24.187*** 0.526
生物量分配Biomass allocation 根生物量比 19.185*** 73.932*** 15.826***
支持结构生物量比 26.184*** 4.897* 53.789***
叶生物量比 29.370*** 22.985 92.728***
根冠比 21.625*** 48.708*** 10.706***
产量Yield 整株产量 269.535*** 24.187*** 0.526
单位面积根产量 609.414*** 27.740*** 0.740

Fig.1

Effects of planting densities and nitrogen levels on the morphological parameters of S.prionitis Different capital letters indicate significant differences among different nitrogen levels under the same planting density (P < 0.05), and small letters indicate significant differences among different planting densities under the same nitrogen level (P < 0.05), the same below."

Fig.2

Effects of planting densities and nitrogen levels on the biomass of different organs of the individual plant of S.prionitis"

Fig.3

Effects of planting densities and nitrogen levels on the biomass allocation of S.prionitis Different lowercase letters indicate significant differences among different treatment combinations (P < 0.05)."

Fig.4

Effects of planting densities and nitrogen levels on the yield of S.prionitis"

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