Growth Responses of Alhagi sparsifolia under Different Water and Nitrogen Supply Levels in Extremely Arid Region

doi:10.11733/j.issn.1007-0435.2016.03.015

Acta Agrestia Sinica ›› 2016, Vol. 24 ›› Issue (3): 581-589.DOI: 10.11733/j.issn.1007-0435.2016.03.015

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Growth Responses of Alhagi sparsifolia under Different Water and Nitrogen Supply Levels in Extremely Arid Region

HUANG Cai-bian^1,2,3, ZENG Fan-jiang^1,2,3, LEI Jia-qiang^1,2

1. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China;
2. Cele National Station of Observation and Research for Desert-Grassland Ecosystems, Cele, Xinjiang 848300, China;
3. Key Laboratory of Biogeography and Bioresource in Arid Zone, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China

Received:2015-05-11 Revised:2016-01-15 Online:2016-06-15 Published:2016-09-18

极端干旱区骆驼刺对水氮条件变化的生长响应

黄彩变^1,2,3, 曾凡江^1,2,3, 雷加强^1,2

1. 中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室, 新疆乌鲁木齐 830011;
2. 新疆策勒荒漠草地生态系统国家野外科学观测研究站, 新疆策勒 848300;
3. 中国科学院干旱区生物地理与生物资源重点实验室, 新疆乌鲁木齐 830011

通讯作者: 黄彩变
作者简介:黄彩变(1982-),女,河南南阳人,博士,助研,主要从事植物生理生态方面的研究,E-mail:huangcaibian7001@sina.com
基金资助:
新疆维吾尔自治区青年科技创新人才培养工程项目（2014731019）；国家自然科学基金项目（31200352）；中国科学院西部之光一般项目（YBXM201403）资助

Abstract

Abstract:

The potting experiment was conducted to study the changes of morphological characteristics,biomass accumulation and allocation of 1- and 2-year-old Alhagi sparsifolia under different water and nitrogen (N) treatments, and to further find out the suitable combination of water and N for the plant growth. The results showed that plant height, canopy, base diameter, shoot and root biomass were significantly affected by water and N supply. The combination of water and N had a significant influence on the biomass allocation of different organs for both growth stages, but the effects differed with growth age. For 1-year-old A. sparsifolia, the highest comprehensive evaluation value of plant growth was found under drought (30%~35% field water capacity (FC)) and low N (51 mg N·kg^-1) treatment, under which there were significantly higher plant height, base diameter, root biomass and root:shoot ratio compared to the control treatment (drought and no N). For 2-year-old A. sparsifolia, shoot and root biomass and root:shoot ratio were highest under middle water and N treatment (60%~65% FC and 102 mg N·kg^-1) compared to other treatments. Correspondingly, the highest comprehensive evaluation value of plant growth was found under this treatment. This suggests that drought and low N treatment was suitable for A. sparsifolia seedlings in the first year, but middle water and N treatment became more appropriate in the second year.

Key words: Alhagi sparsifolia, Biomass, Morphological characteristics, Water treatment, Nitrogen treatment

摘要：

采用盆栽试验，研究了不同水氮处理下骆驼刺（Alhagi sparsifolia）的形态特征、生物量累积和分配特征，并探讨了适合骆驼刺生长的最佳水氮条件。经过2年的水氮处理发现，水分和氮素处理对骆驼刺的株高、冠幅、基茎、地上和地下生物量累积均有显著影响，对生物量分配还存在着明显的交互作用，但在不同生长年份影响也不同。在第1个生长年份，综合评价结果为干旱低氮（田间持水量30%~35%，施氮51 mg N·kg^-1）处理下生长表现最好，主要表现在株高、基茎、根系生物量和根冠比均有明显增加。在第2个生长年份，则为中水中氮处理（田间持水量60%~65%，施氮102 mg N·kg^-1）下综合生长表现最好，主要表现在地上、地下生物量和根冠比均有显著增加。因此，在骆驼刺幼苗生长早期应推荐干旱低氮处理，随株龄增加则为中水中氮处理更合适。

关键词: 骆驼刺, 生物量, 形态特征, 水分处理, 氮素处理

CLC Number:

Q945.78

HUANG Cai-bian, ZENG Fan-jiang, LEI Jia-qiang. Growth Responses of Alhagi sparsifolia under Different Water and Nitrogen Supply Levels in Extremely Arid Region[J]. Acta Agrestia Sinica, 2016, 24(3): 581-589.

黄彩变, 曾凡江, 雷加强. 极端干旱区骆驼刺对水氮条件变化的生长响应[J]. 草地学报, 2016, 24(3): 581-589.

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Growth Responses of Alhagi sparsifolia under Different Water and Nitrogen Supply Levels in Extremely Arid Region

极端干旱区骆驼刺对水氮条件变化的生长响应

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