Effects of Nitrogen Addition on CNP Stoichiometric Traits of Oat-pea Intercropping System

doi:10.11733/j.issn.1007-0435.2024.02.012

Acta Agrestia Sinica ›› 2024, Vol. 32 ›› Issue (2): 450-461.DOI: 10.11733/j.issn.1007-0435.2024.02.012

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Effects of Nitrogen Addition on CNP Stoichiometric Traits of Oat-pea Intercropping System

FENG Xiao-yun^1,2, HOU Tong-lu¹, BAO Gen-sheng^1,2,3, ZHANG Peng^1,2, LI Yuan^1,2, LIANG Guo-ling^1,2,3

1. Qinghai University, Xining, Qinghai Province 810003, China;
2. Qinghai Academy of Animal Science and Veterinary Medicine, Xining, Qinghai Province 810016, China;
3. Key Laboratory of Superior Forage Germplasm in the Qinghai-Tibetan Plateau, Xining, Qinghai Province 810016, China

Received:2023-07-24 Revised:2023-10-22 Online:2024-02-15 Published:2024-03-06

氮添加对燕麦/豌豆间作体系碳氮磷化学计量特征的影响

冯晓云^1,2, 侯统璐¹, 鲍根生^1,2,3, 张鹏^1,2, 李媛^1,2, 梁国玲^1,2,3

1. 青海大学, 青海西宁 810003;
2. 青海省畜牧兽医科学院, 青海西宁 810016;
3. 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

通讯作者: 鲍根生,E-mail:baogensheng2008@hotmail.com
作者简介:冯晓云(1996-),女,汉族,甘肃金昌人,硕士研究生,主要从事豆科牧草栽培育种方面的研究,E-mail:fengxiaoyun0703@126.com;侯统璐(2000-),女,汉族,青海西宁人,本科生,主要从事豆科牧草栽培育种方面的研究,E-mail:2863095540@qq.com
基金资助:
海省科技厅应用基础研究（2022-ZJ-715）；国家自然科学基金项目（32060398、U21A20239）资助

Abstract

Abstract: This study aimed to evaluate the effects of nitrogen addition on the absorption of major nutrients in an oat (Avena sativa)/pea (Pisum sativum) intercropping system. Employing oats and peas as test subjects,three distinct planting methods (monoculture of oats and peas,alternate-row intercropping,and same-row mixed intercropping) were examined in conjunction with three nitrogen addition levels (control at 0 kg·ha^-1,low nitrogen at 50 kg·ha^-1,and high nitrogen at 200 kg·ha^-1). The analysis focused on how different intercropping techniques and nitrogen levels influenced the carbon (C),nitrogen (N),and phosphorus (P) contents and the ratios of C/N,C/P,and N/P in oat and pea stems,leaves,and roots. Key findings include: The carbon,nitrogen and phosphorus content and stoichiometric ratios of pea and oat stems leaves and roots were different under different planting models and nitrogen addition levels； The growth of peas and oats was limited by both N and P under different planting models and nitrogen addition levels； Redundancy analysis (RDA) showed that the intercropping planting model and nitrogen addition level have a positive and negative correlation with carbon,nitrogen,phosphorus content and stoichiometric ratios of pea and oat stems leaves and roots. Therefore,the nutrient use status of plant tissues can be revealed through the change in characteristics of nutrient content,and then provide a theoretical basis for grassland degradation restoration and sustainable development of animal husbandry in alpine regions.

Key words: Intercropping, Nitrogen addition, Stems and leaves, Root, Stoichiometric traits

摘要： 为分析无机氮肥对燕麦（Avena sativa）/豌豆（Pisum sativum）间作体系主要营养元素吸收的影响，本研究以燕麦和豌豆为试验材料，设置单播、隔行间作、同行混合间作3种种植方式和对照（0 kg·ha^-1）、低氮（50 kg·ha^-1）、高氮（200 kg·ha^-1）3个氮添加水平，探究不同间作种植方式和氮添加水平对燕麦、豌豆茎叶及根系碳（C）、氮（N）和磷（P）含量和C/N、C/P、N/P的影响。结果表明：豌豆和燕麦茎叶、根系碳、氮、磷含量及其化学计量比在不同种植方式和氮添加水平下均表现不同；不同种植方式和氮添加水平下，豌豆和燕麦生长受N和P共同限制；RDA分析表明，间作种植方式和氮添加水平与二者茎叶、根系碳、氮、磷含量及其化学计量比存在正负相关。因此，可通过植物组织养分含量变化特征揭示其养分利用状况，进而为高寒区草地退化修复和畜牧业可持续发展提供理论基础。

关键词: 间作种植, 氮添加, 茎叶, 根系, 化学计量特征

CLC Number:

S512.6

FENG Xiao-yun, HOU Tong-lu, BAO Gen-sheng, ZHANG Peng, LI Yuan, LIANG Guo-ling. Effects of Nitrogen Addition on CNP Stoichiometric Traits of Oat-pea Intercropping System[J]. Acta Agrestia Sinica, 2024, 32(2): 450-461.

冯晓云, 侯统璐, 鲍根生, 张鹏, 李媛, 梁国玲. 氮添加对燕麦/豌豆间作体系碳氮磷化学计量特征的影响[J]. 草地学报, 2024, 32(2): 450-461.

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Effects of Nitrogen Addition on CNP Stoichiometric Traits of Oat-pea Intercropping System

氮添加对燕麦/豌豆间作体系碳氮磷化学计量特征的影响

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