Effects of nitrogen application rate and row spacing on seed yield and quality of Leymus secalinus

doi:10.11733/j.issn.1007-0435.2024.03.034

Acta Agrestia Sinica ›› 2024, Vol. 32 ›› Issue (3): 968-976.DOI: 10.11733/j.issn.1007-0435.2024.03.034

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Effects of nitrogen application rate and row spacing on seed yield and quality of Leymus secalinus

DU Li-xia¹, LIAO Ming-wang¹, QIN Shi-li¹, ZHANG Qian¹, LIU Wei²

1. College of Grassland Science, Shanxi Agricultural University, Taigu, Shanxi Province 030801, China;;
2. College of Grassland Resources and Environment, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010019, China

Received:2023-10-16 Revised:2023-12-14 Online:2024-03-15 Published:2024-04-03

施氮量与行距对赖草种子产量及质量的影响

杜利霞¹, 廖明旺¹, 秦士利¹, 张倩¹, 刘伟²

1. 山西农业大学草业学院, 山西太谷 030801;
2. 内蒙古农业大学草原与资源环境学院, 内蒙古呼和浩特 010019

作者简介:杜利霞(1978-)，女，汉族，内蒙古武川人，副教授，博士，主要从事牧草种质资源及育种方面的教学与研究,E-mail:dulixia0328@126.com
基金资助:
山西省重点研发计划(农业领域)(202102140601006)；山西农业大学“十四五”生物育种工程项目(YZGC134)；农业农村部饲草高校生产模式创新重点实验室；山西省重点实验室项目(202104010910017);山西省现代农业产业技术体系建设专项资金共同资助

Abstract

Abstract: This study investigated the effects of nitrogen application rate and row spacing on seed yield and quality of Leymus secalinus using a split-plot experimental design. The main factor was the nitrogen supplementing level (N0 0 kg·hm^-2,N1 60 kg·hm^-2,N2 120 kg·hm^-2,N3 180 kg·hm^-2),and the secondary factor was row spacing (R1 30 cm,R2 40 cm,R3 50 cm,R4 60 cm). Through grey correlation degree and stepwise regression analysis,we comprehensively analyzed the seed yield and quality,identified key factors affecting seed yield,and screened for the optimal planting combination of Leymus secalinus breeding. The results showed that:the main factors affecting the seed yield of Leymus secalinus were the number of reproductive branches,thousand-grain weight,seed number per spikelet,spikelet number per reproductive branches,with the seed number/spikelet being the most significant contributor to the yield. Grey correlation analysis revealed that the optimal seed yield and seed quality were obtained at a nitrogen supplementing level of 120~180 kg·hm^-2 and a planting row spacing of 60 cm. However,there were no significant differences in actual and potential seed yield between 120 kg·hm^-2 nitrogen treatment and 180 kg·hm^-2 nitrogen treatment. Therefore,considering the economic and ecological benefits,a nitrogen supplementing level of 120 kg·hm^-2 and a planting row spacing of 60 cm can be used to achieve the best seed yield and quality.

Key words: Leymus secalinus, Line spacing, Nitrogen application amount, Seed yield, Seed quality, Comprehensive evaluation

摘要： 为探究氮肥施用量与行距对赖草(Leymus secalinus)种子产量及质量的影响,本研究采用裂区试验设计,主区为氮肥添加量(N0 0 kg·hm^-2,N1 60 kg·hm^-2,N2 120 kg·hm^-2,N3 180 kg·hm^-2),副区为行距(R1 30 cm,R2 40 cm,R3 50 cm,R4 60 cm),利用灰色关联度、逐步回归分析等方法对种子产量及质量综合分析,明确影响种子产量的关键因素,筛选赖草种子生产最优种植配置组合。结果表明:影响赖草种子产量的主要因素是生殖枝数、千粒重、种子数/小穗、小穗数/生殖枝,对产量贡献最大的因素是种子数/小穗。经灰色关联分析可知,120~180 kg·hm^-2施氮量和60 cm种植行距时获得最优的种子产量与种子质量,而120 kg·hm^-2施氮量处理下的实际种子产量、潜在种子产量与180 kg·hm^-2施氮量处理均无显著差异,因此从经济效益与生态效益考虑,赖草种子生产可采用120 kg·hm^-2施氮量、60 cm行距,能获得最优的种子产量与质量。

关键词: 赖草, 施氮量, 行距, 种子产量, 种子质量, 综合评价

CLC Number:

S543+.9

DU Li-xia, LIAO Ming-wang, QIN Shi-li, ZHANG Qian, LIU Wei. Effects of nitrogen application rate and row spacing on seed yield and quality of Leymus secalinus[J]. Acta Agrestia Sinica, 2024, 32(3): 968-976.

杜利霞, 廖明旺, 秦士利, 张倩, 刘伟. 施氮量与行距对赖草种子产量及质量的影响[J]. 草地学报, 2024, 32(3): 968-976.

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Effects of nitrogen application rate and row spacing on seed yield and quality of Leymus secalinus

施氮量与行距对赖草种子产量及质量的影响

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