Comprehensive Analyses of the Combined Effects of Nitrogen Application Rate and Sowing Density on the Agronomic Traits and Seed Yield of ‘Qingyan No.2’ Oats

doi:10.11733/j.issn.1007-0435.2026.05.033

Acta Agrestia Sinica ›› 2026, Vol. 34 ›› Issue (5): 1932-1941.DOI: 10.11733/j.issn.1007-0435.2026.05.033

Comprehensive Analyses of the Combined Effects of Nitrogen Application Rate and Sowing Density on the Agronomic Traits and Seed Yield of ‘Qingyan No.2’ Oats

FAN Tai-lian^1,2, WU Rui^1,2, LIANG Guo-ling^1,2, LIU Wen-hui^1,2, HU Ze-long^1,2, WANG Wen-hu^1,2, HAN Ming-mei³

1. Qinghai University College of Animal Husbandry and Veterinary Medicine, Xining, Qinghai Province 810016, China;
2. Key Laboratory of Superior Forage Germplasm in the Qinghai-Tibetan Plateau, Xining, Qinghai Province 810016, China;
3. Qinghai Lüqingxin Agricultural and Animal Husbandry Technology Co., Ltd, Xining, Qinghai Province 810016, China

Received:2025-07-07 Revised:2025-09-14 Published:2026-05-08

氮密互作对‘青燕2号’农艺性状及种子产量影响的综合分析

樊泰莲^1,2, 吴瑞^1,2, 梁国玲^1,2, 刘文辉^1,2, 胡泽龙^1,2, 王文虎^1,2, 韩明梅³

1. 青海大学畜牧兽医科学院, 青海西宁 810016;
2. 青海省青藏高原优良牧草种质资源利用重点实验室, 青海西宁 810016;
3. 青海绿青新农牧科技有限公司, 青海西宁 810016

通讯作者: 梁国玲，E-mail:qhliangguoling@163.com
作者简介:樊泰莲（2001-），女，汉族，青海西宁人，硕士研究生，主要从事牧草育种与栽培研究，E-mail:3555299409@qq.com；
基金资助:
青燕2号燕麦新品种繁育与示范（2023-NK-155）资助

Abstract

Abstract: To explore the effects of nitrogen application and sowing density interaction on the seed yield of ‘Qingyan No.2’ oat （Avena sativa ‘Qingyan No.2’） in the high-altitude area， the optimal planting nitrogen amount and sowing density suitable for the production of ‘Qingyan No.2’ in Huangzhong and its surrounding areas were investigated. This experiment adopted a two-factor randomized block design. Four nitrogen application levels of 0， 45， 90 and 135 kg·hm^-2 （denoted as N₀， N₁， N₂ and N₃） were set， and three sowing densities of 100， 170 and 240 kg·hm^-2 （denoted as S₁， S₂ and S₃） were established. The results showed that the effects of nitrogen application amount， sowing density， and their interaction on agronomic traits and seed yield all reached extremely significant （P<0.01） or significant （P<0.05） levels. Agronomic traits changed significantly with nitrogen application amount and sowing density. The length of the spike， the number of small florets on the main spike， the number of grains on the main spike， the grain weight per spike， and the hundred-grain weight all increased first and then decreased with the increase of nitrogen application amount， and decreased with the increase of sowing density. Seed yield increased first and then decreased with the increase of nitrogen application amount and sowing density， reaching the peak at a nitrogen application amount of 90 kg·hm^-2 and a sowing density of 100 kg·hm^-2. Pearson correlation analysis indicated that seed yield was significantly positively correlated with spike length， the number of small florets on the main spike， the number of grains on the main spike， the grain weight per spike， and the hundred-grain weight. TOPSIS-multi-criteria decision-making model analysis indicated that at a nitrogen application amount of 90 kg·hm^-2 and a sowing density of 100 kg·hm^-2 were the optimal nitrogen application amount and sowing density for ‘Qingyan No.2’ seed production in the study area and similar high-altitude areas.

Key words: ‘Qingyan No.2’Oats, Nitrogen application, Sowing density, Agronomic characters, Seed yield

摘要： 为探讨氮密互作对高寒区‘青燕2号’燕麦（Avena sativa ‘Qingyan No.2’）种子产量的影响，筛选出适宜湟中及周边地区‘青燕2号’生产的最佳施氮量和播种密度。本试验采用双因素随机区组试验设计，设4个施氮量0，45，90和135 kg·hm^-2（分别记作N₀，N₁，N₂和N₃），3个播种密度：100，170和240 kg·hm^-2（分别记作S₁，S₂和S₃）。结果显示，施氮量、播种密度及其互作对农艺性状和种子产量的影响均达到极显著（P<0.01）或显著（P<0.05）。农艺性状随施氮量和播种密度变化明显，穗长、主穗小穗数、主穗穗粒数、主穗穗粒重和千粒重均随着施氮量增加先增加后降低，随播种密度的增加而降低。种子产量随施氮量和播种密度的增加先增加后降低，在施氮量90 kg·hm^-2和播种密度100 kg·hm^-2时达到峰值。皮尔森相关性分析表明种子产量与穗长、主穗小穗数、主穗穗粒数、主穗穗粒重和千粒重呈显著正相关。TOPSIS-多准则决策模型分析表明，在施氮量90 kg·hm^-2和播种密度100 kg·hm^-2下是适宜于研究区及类似高寒区‘青燕2号’种子生产的最佳施氮量和播种密度。

关键词: ‘青燕2号’燕麦, 施氮量, 播种密度, 农艺性状, 种子产量

CLC Number:

S544.9

FAN Tai-lian, WU Rui, LIANG Guo-ling, LIU Wen-hui, HU Ze-long, WANG Wen-hu, HAN Ming-mei. Comprehensive Analyses of the Combined Effects of Nitrogen Application Rate and Sowing Density on the Agronomic Traits and Seed Yield of ‘Qingyan No.2’ Oats[J]. Acta Agrestia Sinica, 2026, 34(5): 1932-1941.

樊泰莲, 吴瑞, 梁国玲, 刘文辉, 胡泽龙, 王文虎, 韩明梅. 氮密互作对‘青燕2号’农艺性状及种子产量影响的综合分析[J]. 草地学报, 2026, 34(5): 1932-1941.

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Comprehensive Analyses of the Combined Effects of Nitrogen Application Rate and Sowing Density on the Agronomic Traits and Seed Yield of ‘Qingyan No.2’ Oats

氮密互作对‘青燕2号’农艺性状及种子产量影响的综合分析

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