Effects of Row Spacing and Sowing Rate on Photosynthetic Characteristics and Yield of Alfalfa in Coastal Saline-alkali Soil in Hebei Province

doi:10.11733/j.issn.1007-0435.2023.08.034

Acta Agrestia Sinica ›› 2023, Vol. 31 ›› Issue (8): 2554-2563.DOI: 10.11733/j.issn.1007-0435.2023.08.034

Effects of Row Spacing and Sowing Rate on Photosynthetic Characteristics and Yield of Alfalfa in Coastal Saline-alkali Soil in Hebei Province

SHI Jia-qi¹, ZHOU Fan², WANG Shou-kai², ZHANG Sheng-guo², LI Si-yan², XIE Nan¹, ZHANG Li-feng¹, FENG Wei¹, ZHI Jian-fei¹, LI Jie-xin³, LIU Zhen-yu¹, LIU Zhong-kuan¹

1. Institute of Agricultural Resources and Environment, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, Hebei Province 050051, China;
2. Agricultural Project Planning Center of Hebei Province, Shijiazhuang, Hebei Province 050021, China;
3. Shanghai Pudong New Area Hangtou Town Economic Development Service Center, Shanghai 201316, hina

Received:2023-02-10 Revised:2023-03-27 Online:2023-08-15 Published:2023-09-01

行距和播量对河北滨海盐碱地苜蓿光合特性及产量的影响

石嘉琦¹, 周繁², 王烁凯², 张圣国², 李思言², 谢楠¹, 张立锋¹, 冯伟¹, 智健飞¹, 李洁鑫³, 刘振宇¹, 刘忠宽¹

1. 河北省农林科学院农业资源环境研究所, 河北石家庄 050051;
2. 河北省农业项目规划中心, 河北石家庄 050021;
3. 上海市浦东新区航头镇经济发展服务中心, 上海 201316

通讯作者: 刘振宇,E-mail:Zhenyu416@126.com;刘忠宽,E-mail:zhongkuanjh@163.com
作者简介:石嘉琦(1995-),女,汉族,河北黄骅人,硕士研究生,主要从事植物生理生态研究,E-mail:664791032@qq.com
基金资助:
国家重点研发计划(2021YFD19009)；河北省农林科学院科技创新专项(2022KJCXZX-ZHS-7)；国家牧草产业技术体系(CARS-34)；河北省现代农业产业技术体系饲草创新团队资助

Abstract

Abstract: This study was conducted to reveal the effects of row spacing and sowing rate on the photosynthetic characteristics and yield of alfalfa in coastal saline-alkali soil in Hebei Province. The Medicago sativa 'Zhongmu No.1' was used as the tested material,the row spacing were set up at 15 cm(R1),20 cm (R2),25 cm(R3),in the same time the sowing rate were set at 7.5 kg·hm^-2 (S0),15 kg·hm^-2 (S1),22.5 kg·hm^-2 (S2),30 kg·hm^-2 (S3) and 37.5 kg·hm^-2 (S4). The change of pigment content,fluorescence parameters,photosynthetic curve,and yield of alfalfa under 15 treatments were investigated. The results showed that chlorophyll content (ChlM) and nitrogen flavonol index (NFI) of alfalfa leaves decreased with the increase of row spacing,and the NFI of alfalfa leaves treated with R1S2 was the highest among all treatments. Path analysis showed that row spacing and sowing rate affected plant photosynthesis and yield formation by regulating alfalfa ChlM,anthocyanin content (AnthM),flavonol content (FlvM),maximal photochemical efficiency (F_v/F_m),Quantum yield of regulatory energy dissipation (Y(NPQ)) and table apparent electron transfer rate (ETR) of alfalfa leaves. Under the conditions of this study,when the row spacing was 15 cm and the sowing rate about 22 kg·hm^-2,alfalfa would achieve the highest yield.

Key words: Saline-alkali Soil, Alfalfa, Row spacing, Sowing rate, Photosynthetic characteristics, Yield

摘要： 为揭示行距和播量对河北滨海盐碱地苜蓿光合特性及产量的影响，本研究以'中苜一号'为材料，设置了15 cm(R1)，20 cm(R2)，25 cm(R3)3个水平的行距和7.5 kg·hm^-2(S0)，15 kg·hm^-2(S1)，22.5 kg·hm^-2(S2)，30 kg·hm^-2(S3)，37.5 kg·hm^-2(S4)5个水平的播量，共15个处理，研究了苜蓿叶片色素含量、荧光参数、光合曲线及产量的变化规律。结果表明：随着行距的增大苜蓿叶片叶绿素含量(Chlorophyll content,ChlM)和氮-黄酮醇指数(Nitrogen flavonol index,NFI)均呈下降趋势，R1S2处理的苜蓿叶片NFI最高。通径分析表明，行距和播量配置通过调节叶片ChlM，花青素含量(Anthocyanin content,AnthM)，黄酮醇含量(Flavonol content,FlvM)，最大光合效率(Maximal photochemical efficiency,F_v/F_m)，调节性能量耗散的量子产量(Quantum yield of regulatory energy dissipation,Y(NPQ))和表观光合电子传递速率(Electron transfer rate,ETR)影响苜蓿光合作用和产量的形成。在本研究条件下，行距15 cm、播量约22 kg·hm^-2配置下苜蓿产量最高。

关键词: 盐碱地, 苜蓿, 行距, 播量, 光合特性, 产量

CLC Number:

S352
S541

SHI Jia-qi, ZHOU Fan, WANG Shou-kai, ZHANG Sheng-guo, LI Si-yan, XIE Nan, ZHANG Li-feng, FENG Wei, ZHI Jian-fei, LI Jie-xin, LIU Zhen-yu, LIU Zhong-kuan. Effects of Row Spacing and Sowing Rate on Photosynthetic Characteristics and Yield of Alfalfa in Coastal Saline-alkali Soil in Hebei Province[J]. Acta Agrestia Sinica, 2023, 31(8): 2554-2563.

石嘉琦, 周繁, 王烁凯, 张圣国, 李思言, 谢楠, 张立锋, 冯伟, 智健飞, 李洁鑫, 刘振宇, 刘忠宽. 行距和播量对河北滨海盐碱地苜蓿光合特性及产量的影响[J]. 草地学报, 2023, 31(8): 2554-2563.

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Effects of Row Spacing and Sowing Rate on Photosynthetic Characteristics and Yield of Alfalfa in Coastal Saline-alkali Soil in Hebei Province

行距和播量对河北滨海盐碱地苜蓿光合特性及产量的影响

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