干旱区生态环境知识资源中心(Arid): 荒漠黑果枸杞化学计量特征对氮磷添加比例和水平的响应

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	荒漠黑果枸杞化学计量特征对氮磷添加比例和水平的响应
其他题名	Response of stoichiometry of desert Lycium ruthenicum to N and P addition levels and ratios
	李金霞; 陈年来; 孙小妹; 李发奎; 郁洁汝
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2021
卷号	44 期号:6 页码:1750-1762
中文摘要	植物化学计量特征对阐明生物地球化学及生态过程对全球变化的响应至关重要。研究不同氮磷(N、P)添加处理对荒漠植物生态化学计量特征的影响,可从化学计量的角度理解植物对环境变化的响应,为预测全球变化背景下植物和营养元素的相互作用提供思路。以黑果枸杞(Lycium ruthenicum)为材料,设置3个氮磷添加量和比例,通过大田试验研究了黑果枸杞C:N:P化学计量特征对氮磷添加的响应,比较分析了器官间的化学计量特征。结果表明:(1)氮磷添加对黑果枸杞不同器官碳(C)含量的影响较小,随氮磷添加量的增加,细根N含量显著增大;随氮磷添加比例的提高,非根器官N含量显著增加,根系P含量显著降低;氮磷添加比例和添加量的交互效应显著影响了根系和果实N、P含量及茎P含量。(2)低氮磷添加比处理降低了器官碳磷比(C/P),提高了碳氮比(C/N),而高氮磷添加比处理与之相反,各器官氮磷比(N/P)维持在相对稳定的水平,黑果枸杞通过调整养分保存策略以保守的养分利用方式抵消环境元素化学计量的变化。(3)黑果枸杞化学计量特征体现出器官功能差异性,叶片N含量和N/P显著高于其他器官,茎C/N最高,粗根C含量和C/P最高,细根N、P含量和N/P较高,果实P含量最高。相对于C,代谢活跃器官(叶、细根、果实)比非代谢活跃器官(茎、粗根)需要更多的N和P。研究结果有助于更好地从元素与植物功能的角度理解荒漠植物化学计量特征对氮磷添加的响应。
英文摘要	The stoichiometric features of plants are important for elucidating the response of biogeochemical and ecological methods to global change. Studying the effects of different nitrogen (N) and phosphorus (P) addition treatments on the ecological stoichiometric characteristics of desert plants can help understand the response of plants to environmental changes from the perspective of stoichiometry and provide ideas for predicting plants and nutrients interactions in the context of global change. Therefore, we used Lycium ruthenicum as the material and set up three N, P supply ratios and supply levels and examined the effects of the supply ratio and level on the C:N: P stoichiometric features of various organs. The results indicated that: (1) Nitrogen and phosphorus addition had little impact on the carbon (C) content in various organs. The content of N in the fine roots considerably increased with a rise in N, P supply level. With the increase in N, P supply ratio, the content of N in nonroot organs increased and the content of P in the root system decreased considerably. The interaction between the proportion of N, P supply level and the supply ratio greatly affected the N, P content in roots and fruits as well as the P content in stems. (2) The low N/P treatment decreased organ C/P and increased C/N, whereas the high N/P treatment was the opposite. The N/P of each organ was maintained at a relatively stable level, Lycium ruthenicum offset the change in environmental element stoichiometry in a conservative nutrient utilization method by altering the nutrient preservation strategy. (3) Stoichiometric characteristics reflected organ differences. The content of N and N/P in leaves was considerably higher than that in other organs. The content of C/N in stems, C and P in coarse roots, as well as the content of P in fruits was the highest. The NP and N/P contents in fine roots were also higher. Compared with C, metabolically active organs (leaves, fine roots, fruits) require more N and P than structural organs (stems, coarse roots). From the perspective of elements and plant functions, the research findings were helpful in better understanding the response of desert plant stoichiometric properties to nitrogen and phosphorus addition.
中文关键词	化学计量特征 ; 氮磷添加量 ; 氮磷添加比例 ; 黑果枸杞
英文关键词	stoichiometry characteristics N, P supply level N, P supply ratio Lycium ruthenicum
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:7114553
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377655
作者单位	李金霞, 甘肃农业大学资源与环境学院, 兰州, 甘肃 730070, 中国.; 陈年来, 甘肃农业大学资源与环境学院, 兰州, 甘肃 730070, 中国.; 孙小妹, 甘肃农业大学资源与环境学院, 兰州, 甘肃 730070, 中国.; 李发奎, 甘肃农业大学资源与环境学院, 兰州, 甘肃 730070, 中国.; 郁洁汝, 甘肃农业大学资源与环境学院, 兰州, 甘肃 730070, 中国.
推荐引用方式 GB/T 7714	李金霞,陈年来,孙小妹,等. 荒漠黑果枸杞化学计量特征对氮磷添加比例和水平的响应[J],2021,44(6):1750-1762.
APA	李金霞,陈年来,孙小妹,李发奎,&郁洁汝.(2021).荒漠黑果枸杞化学计量特征对氮磷添加比例和水平的响应.干旱区地理,44(6),1750-1762.
MLA	李金霞,et al."荒漠黑果枸杞化学计量特征对氮磷添加比例和水平的响应".干旱区地理 44.6(2021):1750-1762.