干旱区生态环境知识资源中心(Arid): 灌溉对沙拐枣幼苗根区土壤氮素营养特征的影响

Arid

	灌溉对沙拐枣幼苗根区土壤氮素营养特征的影响
其他题名	Effects of Irrigation on Nitrogen Nutrition Characteristics in the Rootzone Soil of Calligonum caput-medusae Schrenk Seedlings
	黄彩变; 曾凡江; 雷加强; 徐立帅; 高欢欢
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2013
卷号	27 期号:6 页码:152-157
中文摘要	采用盆栽试验,研究不同灌溉梯度下(4.6,6.1,7.7,9.2,13.0kg/株·次)沙拐枣幼苗根区氮素营养变化特征及植物吸氮能力差异。结果表明,自然土壤种植沙拐枣后,不同季节幼苗根区硝态氮和铵态氮含量均成降低趋势,季末分别降低70.9%~92.4%和20.3%~51.6%,且灌溉量越高降低越明显;根区全氮和有机质含量则成增加趋势,随灌溉量增加全氮含量变化较小,但有机质含量有降低的趋势。与4.6kg/(株·次)处理相比,季末整株吸氮量分别增加10.8%,79.8%,85.4%和290.2%,干物质累积量相应增加13.2%,97.8%,197.6%和394.6%,但在最高灌溉量下植物出现严重病害。这表明灌溉后根区矿化氮亏缺主要与植物大量吸收和消耗有关。由此可见,灌溉量过低和过高均不利于沙拐枣幼苗生长,结合根区氮素供应变化,中等灌溉量7.7~9.2kg/(株·次)更为适宜。
英文摘要	The pot experiment was carried out to study the nitrogen(N)characteristics in the rootzone soil, as well as N uptake capacity of Calligonum caput-medusae Schrenk seedlings under different irrigation treatments(4.6,6.1,7.7,9.2,13.0kg/plant each time).The results showed that both nitrate-N and ammonium-N contents in the rootzone soil decreased significantly with irrigation amount.The mean values of nitrate-N and ammonium-N contents in the rootzone soil of C.caput-medusae Schrenk were 70.9%~92.4% and 20.3%~51.6%lower than these in the desert soil at the end of plant growth stage respectively.However, total N and organic matter contents in the rootzone soil were higher than these in natural soil.This suggested that C.caput-medusae Schrenk seedlings had relatively stable soil N pool at early growth stage.Total N content was not affected by the increasing irrigation amount,but soil organic matter content decreased,especially under the highest irrigation amount.The N uptake of whole plant under different irrigation treatments declined by 10.8%,79.8%,85.4%,and 290.2%respectively compared to that under the treatment of 4.6 kg/plant each time.Corresponding values for dry matter accumulation of whole plant increased by 13.2%, 97.8%,197.6%,and 394.6%respectively,but the serious powdery mildew of seedlings occurred at high irrigation level(13.0kg/plant each time).This indicated that the deficiency of nitrate-N and ammonium-N in the rootzone soil was mainly due to plant absorption and consumption.Considering plant growth and soil N application,medium irrigation level(7.7~9.2kg/plant each time)was the recommended for C.caput-medusae Schrenk seedlings at early growth stage.
中文关键词	沙拐枣幼苗 ; 灌溉 ; 硝态氮 ; 铵态氮 ; 全氮 ; 有机质
英文关键词	Calligonum caput-medusae Schrenk seedlings irrigation nitrate-N ammonium-N total nitrogen organic matter
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY ; AGRICULTURAL ENGINEERING
WOS研究方向	Agriculture
CSCD记录号	CSCD:5007185
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230180
作者单位	中国科学院新疆生态与地理研究所, 新疆策勒荒漠草地生态系统国家野外科学观测研究站, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	黄彩变,曾凡江,雷加强,等. 灌溉对沙拐枣幼苗根区土壤氮素营养特征的影响[J]. 中国科学院新疆生态与地理研究所,2013,27(6):152-157.
APA	黄彩变,曾凡江,雷加强,徐立帅,&高欢欢.(2013).灌溉对沙拐枣幼苗根区土壤氮素营养特征的影响.水土保持学报,27(6),152-157.
MLA	黄彩变,et al."灌溉对沙拐枣幼苗根区土壤氮素营养特征的影响".水土保持学报 27.6(2013):152-157.