Effects of the Interaction between Density and Nitrogen Fertilizer on Seed Yield and Activity of Elymus Sibiricus

doi:10.6048/j.issn.1001-4330.2022.03.002

Abstract

Abstract:

【Objective】 To study the effects of different densities and nitrogen fertilizer interaction on seed yield and vigor of Elymus sibiricus in Xinjiang, and to provide theoretical basis for seed production of Elymus sibiricus.【Methods】 The split plot design was adopted and two density treatments (258,700 plants/hm²) and high density (715,200 plants /hm²) were set up. Under each density level, 5 nitrogen application treatments were set, including 0, 30, 60, 90 and 120 kg/hm², respectively.【Results】 There were significant differences in seed yield of E. sibiricus under different densities and nitrogen application treatments (P < 0.05); under different density treatments, the highest seed yield was 899.3 kg/hm² at low density (258,700 plants/hm²), 54.3% higher than that under low density and no nitrogen application treatment, and 90 kg/hm² under high density. The highest seed yield was 730.6 kg/hm², and the yield increased by 58.3% under the treatment of higher density and no nitrogen application. The seed vigor of E. sibiricus was significantly increased under the condition of nitrogen density interaction (P < 0.05). The germination potential, germination index, radicle length and seedling fresh weight of low density treatment were significantly higher than those of high density treatments (P < 0.05).【Conclusion】 In the experimental area, under the planting density of 258,700 plants/hm², 90 kg/hm² of nitrogen fertilizer can obtain the high yield and high quality seeds of E. sibiricus.

Key words: Elymus sibiricus; planting density; nitrogen application; seed yield; seed vigor

摘要：

【目的】研究不同密度和氮肥互作对新疆地区老芒麦种子产量和活力的影响,为新疆地区老芒麦种子生产提供参考依据。【方法】采用裂区试验设计,设置低密度(25.87×10⁴株/hm²)和高密度(71.52×10⁴株/hm²)2个密度处理,每个密度水平下设0、30、60、90和120 kg/hm² 5个施氮处理,收获后测定老芒麦种子活力。【结果】密度和施氮处理均对老芒麦种子产量具有显著影响(P<0.05);不同密度处理下,以低密度、施氮量90 kg/hm²处理种子产量最高,为899.3 kg/hm²,较不施氮处理增产54.3%;高密度条件下施氮量90 kg/hm²种子产量最高,为730.6 kg/hm²,较不施氮处理增产58.3%。90 kg/hm²施氮处理获得的老芒麦种子活力最高,该施氮水平下低密度处理的种子在发芽势、发芽指数、胚根长和幼苗鲜重等指标显著高于高密度处理(P<0.05)。【结论】老芒麦25.87×10⁴株/hm²密度处理下,90 kg/hm²的氮肥施用量可以获得优质高产的老芒麦种子。

关键词: 老芒麦, 密度, 施氮, 种子产量, 种子活力

CLC Number:

S512.9

WANG Rujia, TANG Feng, ZHANG Shuzhen, ZHANG Yongchao, LUO Jin, CHEN Yingxia, ZHANG Lei, ZHANG Bo. Effects of the Interaction between Density and Nitrogen Fertilizer on Seed Yield and Activity of Elymus Sibiricus[J]. Xinjiang Agricultural Sciences, 2022, 59(3): 533-540.

王茹佳, 唐凤, 张树振, 张永超, 罗金, 陈映霞, 张磊, 张博. 密度和氮肥互作对老芒麦种子产量和活力的影响[J]. 新疆农业科学, 2022, 59(3): 533-540.

Figures/Tables 4

Fig.1 Effect of interaction between density and nitrogen application levels on seed yield of Elymus sibiricus Note: Different lowercase letters indicate that there is significant difference at 0.05 level among different nitrogen fertilizer levels under the same density, * indicates that there is significant difference at 0.05 level under the same nitrogen treatment, and ** indicates that the difference is significant at 0.01 level. The significance analysis in the figure is calculated by standard deviation, the same as below

Fig.2 Cumulative germination rate of Elymus sibiricus seeds under different nitrogen application levels and densities

Fig.3 Effects of density and nitrogen application on Germination Characteristics of Elymus sibiricus seeds

Fig.4 Effects of density and nitrogen application on growth of Elymus sibiricus seedlings

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