施氮对胡麻/大豆间作体系作物间作优势及种间关系的影响

doi:10.11686/cyxb2015235

草业学报 ›› 2016, Vol. 25 ›› Issue (3): 181-190.DOI: 10.11686/cyxb2015235

施氮对胡麻/大豆间作体系作物间作优势及种间关系的影响

杨萍¹, 李杰², 张中凯¹, 崔政军¹, 杨天庆¹, 牛俊义^{1, *}

1.甘肃农业大学农学院,甘肃兰州730070;
2.甘肃农业大学园艺学院,甘肃兰州730070

收稿日期:2015-05-12 出版日期:2016-03-20 发布日期:2016-03-20
通讯作者: E-mail:niujy@gsau.edu.cn
作者简介:杨萍(1986-),女,甘肃临洮人,在读博士.E-mail:gsau123@163.com
基金资助:
国家现代农业产业技术体系建设专项(CARS-17-GW-9)和国家自然科学基金(31360315)资助

Effect of nitrogen application on intercropping advantages and crop interactions under an oil flax and soybean intercrop system

YANG Ping¹, LI Jie², ZHANG Zhong-Kai¹, CUI Zheng-Jun¹, YANG Tian-Qing¹, NIU Jun-Yi^{1, *}

1.College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China;
2. College of Horticulture, Gansu Agricultural University, Lanzhou 730070, China

Received:2015-05-12 Online:2016-03-20 Published:2016-03-20

摘要/Abstract

摘要： 农业生产中氮是最大的土壤养分资源,影响间作体系的生产力优势,然而,氮对作为北方旱作农业的新型间作模式的胡麻/大豆间作体系的影响机理并不清楚.本研究通过田间试验,探讨了不同施氮水平(0,75,150 kg/hm²)对胡麻/大豆间作体系的间作优势特征,种间关系和间作产量的影响.结果表明,胡麻/大豆间作体系表现出明显的种间优势,胡麻/大豆间作的生物量和产量的土地当量比(LER)值均大于1,且随施氮量的增加呈先增大后减小的趋势,在N₁(75 kg/hm²)下均达到最大,分别为1.25和1.30.胡麻的种间竞争能力在N₀(0 kg/hm²)和N₁(75 kg/hm²)下强于大豆(A_o>0,CR_o>1),在N₂(150 kg/hm²)下弱于大豆(A_o<0,CR_o<1).胡麻/大豆间作体系的籽粒产量和生物学产量在N₁下均达到最大,分别为2440.5 kg/hm²和7594.3 kg/hm².说明胡麻/大豆间作体系在N₁(75 kg/hm²)下最利于胡麻大豆协调增产.

Abstract: Nitrogen is one of the greatest nutritional resources in agriculture, affecting the yield advantage of many intercrop systems. However, it is unclear how nitrogen application affects oil flax and soybean intercrop systems in northern dry farming land. A field experiment was conducted to explore productivity, interaction and yield under intercropping supplemented with different nitrogen rates (0, 75 and 150 kg N/ha). Oil flax/soybean intercropping systems exhibited interspecific advantages. The land equivalent ratio (LER) based on biomass and yield were greater than 1. With increased nitrogen application, the LER initially increased before peaking at 75 kg N/ha, 1.25 and 1.30 respectively for biomass and yield, and subsequently declining. The interspecific competition ability of oil flax was better than soybean under 0 and 75 kg N/ha, and weaker under 150 kg N/ha. The yield and biomass of oil flax/soybean intercrop systems were maximized at 75 kg N/ha, achieving 2440.5 and 7594.3 kg/ha respectively.

杨萍, 李杰, 张中凯, 崔政军, 杨天庆, 牛俊义. 施氮对胡麻/大豆间作体系作物间作优势及种间关系的影响[J]. 草业学报, 2016, 25(3): 181-190.

YANG Ping, LI Jie, ZHANG Zhong-Kai, CUI Zheng-Jun, YANG Tian-Qing, NIU Jun-Yi. Effect of nitrogen application on intercropping advantages and crop interactions under an oil flax and soybean intercrop system[J]. Acta Prataculturae Sinica, 2016, 25(3): 181-190.

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施氮对胡麻/大豆间作体系作物间作优势及种间关系的影响

Effect of nitrogen application on intercropping advantages and crop interactions under an oil flax and soybean intercrop system

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