干旱区生态环境知识资源中心(Arid): 黄土高原不同灌水量下春小麦土壤与植物碳氮磷含量及其化学计量比特征

Arid

	黄土高原不同灌水量下春小麦土壤与植物碳氮磷含量及其化学计量比特征
其他题名	Soil and plant carbon, nitrogen, and phosphorus content and their stoichiometry in spring wheat under different irrigation treatments in the Loess Plateau
	袁建钰; 李广; 闫丽娟; 陈国鹏; 张尚文; 滕锐; 卓玛草
来源期刊	草业科学
ISSN	1001-0629
出版年	2020
卷号	37 期号:9
中文摘要	为探讨农作物种植过程中土壤和植物养分动态变化规律,对陇中黄土高原半干旱区4种不同灌水处理下[W50 (50 mm)、W100 (100 mm)、W150 (150 mm)、W200 (200 mm) ]的春小麦(Triticum aestivum)成熟期0 - 40 cm土壤及叶片进行采集并分析,研究不同灌水处理对土壤、叶片营养元素及化学计量比的影响。结果显示:1)土壤有机碳和全氮含量均随灌水量的增加呈先增大后减小的趋势,全磷含量受灌水量影响较小;0 - 40 cm土层有机碳和全氮含量均随土层深度的增加呈下降趋势,全磷含量随土层深度的增加无显著变化;2)春小麦叶片C、N、P含量随灌水量的增加呈先增加后降低的趋势,均在150 mm灌水量下达到最大值;叶片C∶N、C∶P、N∶P比值呈先减小后增大的变化趋势,根据小麦叶片N∶P < 14可知,黄土高原地区小麦生长主要受N限制;3)春小麦土壤、叶片养分转化之间存在显著的相关关系,且C∶P对两者养分关系最为敏感。研究结果表明,当灌水量为150 mm时,应适当增施氮肥来增加土壤养分以保证春小麦的高产稳产。
英文摘要	To investigate the change law of nutrients in soil-crop ecosystems, ripe Triticum aestivum located in the loess semi-arid region of Longdong, soil at a depth of 0 - 40 cm, and four different irrigation treatments [W50 (50 mm), W100 (100 mm), W150 (150 mm), and W200 (200 mm) ], were selected to analyze the nutrient and ecological stoichiometric characteristics of soil and leaves. The results showed that 1) the content of soil organic carbon and total nitrogen first increased and then decreased as the amount of irrigation increased, and the total phosphorus content did not change much with increased irrigation; organic carbon and total nitrogen content in the 0 - 40 cm soil layer decreased as soil depth increased, and the total phosphorus content did not change significantly as soil depth increased. 2) The content of C, N, and P in T. aestivum first increased and then decreased as amount of irrigation increased. When the irrigation amount was 150 mm, the maximum value was reached; the ratios of leaf C∶N, C∶P, and N∶P first decreased and then increased. According to the N∶P < 14 observed in the T. aestivum leaf, the growth of T. aestivum in Longdong was limited mainly by N. 3) There was a significant correlation between soil and leaf nutrient transformation in T. aestivum, and C∶P was the most sensitive to the nutrient relationship. The results showed that nitrogen fertilizer should be increased to ensure higher and more stable yield of T. aestivum when the irrigation amount is 150 mm.
中文关键词	有机碳 ; 灌水量 ; 土壤养分 ; 化学计量比
英文关键词	organic carbon irrigation amount soil nutrient stoichiometry
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6830114
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353344
作者单位	袁建钰, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国. 李广, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国. 陈国鹏, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国. 张尚文, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国. 卓玛草, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国. 闫丽娟, 甘肃农业大学农学院, 兰州, 甘肃 730070, 中国. 滕锐, 甘肃农业大学信息技术学院, 兰州, 甘肃 730070, 中国.
推荐引用方式 GB/T 7714	袁建钰,李广,闫丽娟,等. 黄土高原不同灌水量下春小麦土壤与植物碳氮磷含量及其化学计量比特征[J],2020,37(9).
APA	袁建钰.,李广.,闫丽娟.,陈国鹏.,张尚文.,...&卓玛草.(2020).黄土高原不同灌水量下春小麦土壤与植物碳氮磷含量及其化学计量比特征.草业科学,37(9).
MLA	袁建钰,et al."黄土高原不同灌水量下春小麦土壤与植物碳氮磷含量及其化学计量比特征".草业科学 37.9(2020).