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土壤氮、盐浓度对盐角草(Salicornia europaea)生长发育及氮素吸收的影响/Effects of Soil Nitrogen and Salt Concentration on Growth and Nitrogen Uptake of Salicornia europaea[J]
Authors
Chen Chunxiu
Huang Jian
+10 more
Ren Qian
Tian Changyan
Yin Hailong
中国科学院大学,北京100049
中国科学院新疆生态与地理研究所绿洲生态与荒漠环境国家重点实验室,新疆乌鲁木齐830011
任婧
尹海龙
田长彦
陈春秀
黄建
Publication date
1 January 2014
Publisher
Abstract
以盐生植物盐角草(Salicornia europaea)为材料,以NaCl模拟不同盐度环境,盆栽试验了氮(0.3 g· kg-1,N1;0.6 g· kg-1,N2;1.2 g· kg-1,N3;2.4g· kg-1,N4)、盐(2.5 g·kg-1,S1;5.0g·kg-1,S2;7.5 g·kg-1,S3)处理对其生长发育及氮素吸收利用的影响.结果表明:(1)不同盐度下施氮均可以显著促进盐角草的生长,地上部干质量均在N2处理下达到最大,而株高均在N1时达到最高,且施氮对盐角草生长的影响与盐度有关;(2)不同盐度环境下施氮所能达到的最高干物质产量及最高施氮限量不同,表现为S3<S1<S2,随着施氮量的增加,氮素生产力与氮素农学利用效率均表现出下降的趋势;(3)施氮显著增加了盐角草各器官含氮量及氮吸收量,同一施氮水平下盐角草各器官含氮量及氮吸收量均表现为同化枝>茎>根;(4)同一施氮水平下,随着盐度的增加,盐角草同化枝渗透势显著下降,同一盐度环境下,随着施氮量的增加,同化枝渗透势呈现出下降趋势,渗透调节能力增大;(5)3个盐度环境下,施氮均增加盐角草同化枝光合色素含量,从而提高光合效率,增强其对盐渍环境的适应能力
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Last time updated on 29/11/2016