Effects of Water， Nitrogen and Phosphorus Additions on Oat Growth in Grassland Soils with Different Degradation Degrees

doi:10.11733/j.issn.1007-0435.2025.05.002

Acta Agrestia Sinica ›› 2025, Vol. 33 ›› Issue (5): 1355-1362.DOI: 10.11733/j.issn.1007-0435.2025.05.002

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Effects of Water， Nitrogen and Phosphorus Additions on Oat Growth in Grassland Soils with Different Degradation Degrees

HUANG Jing, LIU Ke-si, HONG Yi-nan, GAO Qian, SU Ying-jia, DU Jin-shan, ZHONG Xiao-lan, PU Jun-yu, WANG Kun

College of Grassland Science and Technology, China Agricultural University, Beijing 100193, China

Received:2024-10-09 Revised:2024-11-22 Online:2025-05-15 Published:2025-05-20

水分和氮磷添加对不同退化程度草地土壤燕麦生长的影响

黄晶, 刘克思, 洪逸楠, 高茜, 苏颖佳, 杜金山, 钟小兰, 蒲俊宇, 王堃

中国农业大学草业科学与技术学院, 北京 100193

通讯作者: 刘克思,E-mail:kliu@cau.edu.cn;王堃,E-mail:wangkun@cau.edu.cn
作者简介:黄晶（1994-），女，汉族，内蒙古呼伦贝尔人，博士研究生，主要从事草地生态学相关研究，E-mail：huangjing0412@cau.edu.cn
基金资助:
国家现代农业产业技术体系（CARS-34）；国家自然科学基金项目（32271764）；2022生态地面多样性监测项目（202205512010543）资助

Abstract

Abstract: This study was conducted as a pot experiment， and employed in-situ soils collected from grasslands with different degrees of degradation as test soil samples. Two treatment approaches were implemented：（1） adding water， nitrogen （N）， and phosphorus （P） to simulate the conditions of non-degraded grassland；（2） maintaining the original water and nutrient levels without any additions. The effects of these treatments on the plant height， aboveground and underground biomass， leaf thickness and normalized difference vegetation index （NDVI） of oat （Avena sativa） were analyzed. The results showed as follows： The plant height of oat in lightly degraded grassland was significantly increased by water， N and P additions （P<0.05）， and the effect of water was more significant. Water， N and P additions significantly increased plant height， above-ground biomass and NDVI of oats in moderately and severely degraded grassland （P<0.05）. The effects of water on plant height and NDVI in moderately and severely degraded grassland were greater than those in N， P additions， while the effects of N， P additions on above-ground biomass in moderately and severely degraded grassland were greater than those in water treatment. Only N， P additions significantly increased the underground biomass of oat in moderately degraded and severely degraded grassland （P<0.05）. This study identified the key factors influencing the cultivation of high-quality forage in degraded grassland ecosystems. The findings provided a theoretical foundation for the rational development and utilization of degraded grasslands， as well as for the formulation of efficient planting strategies. Additionally， the results offered valuable insights to support the enhancement of grassland productivity.

Key words: Degraded grassland, Oat, Water, Nutrient, Growth index

摘要： 本研究基于盆栽试验，以采自不同退化程度草地的原位土为供试土样，通过不同处理方式（一是水分和氮磷添加使其达到未退化草地的水分和氮磷状态，二是保持原有水分和氮磷状态而不进行添加）分析不同水分和氮磷水平对燕麦（Avena sativa）株高、地上和地下生物量、叶片厚度和归一化差异植被指数（Normalized difference vegetation index，NDVI）等生长指标的影响。结果表明：水分和氮磷添加显著提高了轻度退化草地燕麦的株高（P<0.05），且水分的影响效应更大；水分和氮磷添加显著提高了中、重度退化草地的燕麦株高、地上生物量和NDVI（P<0.05），水分对中、重度退化草地燕麦植被高度和NDVI的影响大于氮磷添加，而氮磷添加对其地上生物量的影响大于水分处理；氮磷添加显著提高了中度和重度退化草地的燕麦地下生物量（P<0.05）。本研究揭示了退化草地生态系统中优质牧草种植的关键影响因素。研究结果可为退化草地的合理开发利用和高效种植策略的制定提供理论依据，同时还为草地生产力的提升提供参考支持。

关键词: 退化草地, 燕麦, 水分, 养分, 生长指标

CLC Number:

S153.6

HUANG Jing, LIU Ke-si, HONG Yi-nan, GAO Qian, SU Ying-jia, DU Jin-shan, ZHONG Xiao-lan, PU Jun-yu, WANG Kun. Effects of Water， Nitrogen and Phosphorus Additions on Oat Growth in Grassland Soils with Different Degradation Degrees[J]. Acta Agrestia Sinica, 2025, 33(5): 1355-1362.

黄晶, 刘克思, 洪逸楠, 高茜, 苏颖佳, 杜金山, 钟小兰, 蒲俊宇, 王堃. 水分和氮磷添加对不同退化程度草地土壤燕麦生长的影响[J]. 草地学报, 2025, 33(5): 1355-1362.

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Effects of Water， Nitrogen and Phosphorus Additions on Oat Growth in Grassland Soils with Different Degradation Degrees

水分和氮磷添加对不同退化程度草地土壤燕麦生长的影响

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