Salt Dynamics in Rhizosphere of Puccinellia ciliata Bor.in a Loamy Soil

ZHANG Zhen-Hua; C. TANG; Z. RENGEL

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Salt Dynamics in Rhizosphere of Puccinellia ciliata Bor.in a Loamy Soil

机译：壤土中Puccinellia ciliata Bor。的根际盐动态

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A glasshouse experiment using a rhizobox technique was conducted to examine salt dynamics in the rhizosphere of a on salt accumulation in the rhizosphere. The rhizobox (10 × 5.5 × 50 cm) had a nylon mesh (1 μm) positioned vertically in the middle to create two compartments filled with soil amended with 1 g NaCl kg-1. The plants were grown in one compartment only. Flushed treatments received 275 mL of deionized water two days before harvest. In the plant-growing compartment, soils were sectioned vertically at 5 cm intervals. Significant differences in soil electrical conductivity (EC)(P＜0.05) and pH (P＜0.05) were observed for depths, but not between flushed and non-flushed treatments. In the no-plant compartment (rhizosphere), soil cores were taken horizontally at depths of 5, 20 and 40 cm and sliced at 1, 2,3, 4, 5, 7, 10, 15 and 20 mm away from the roots. Soil EC and Cl- concentration at the 5 and 20 cm depths, and Na+ concentration at the 5 cm depth significantly decreased (P<0.05) with the distance away from the root, but no significant differences were observed in soil pH and concentrations of the K+ and Ca2+. The flush treatment only had significant influence on soil EC, pH, and Cl- concentration at the 20 cm depth. Thus, salt accumulation could occur in the rhizosphere of salt-tolerant species on saline soils, and the periodic low rainfall might not have a strong influence on salt distribution in the rhizosphere and/or root zone.

机译：进行了使用根瘤菌盒技术的温室实验，以检查根际中盐累积的根际中的盐动力学。根瘤菌箱（10×5.5×50 cm）的尼龙网（1μm）垂直放置在中间，形成两个充满土壤的隔室，土壤中用1 g NaCl kg-1修正。这些植物仅在一个隔室中生长。收获前两天，冲洗处理收到了275 mL去离子水。在植物生长室中，将土壤以5 cm的间隔垂直切开。深度观察到土壤电导率（EC）（P ＜0.05）和pH（P ＜0.05）的显着差异，但冲洗和非冲洗处理之间没有显着差异。在无植物隔室（根际）中，在5、20和40厘米的深度水平取土芯，并在距根部1、2、3、4、5、7、10、15和20毫米处切片。 5 cm和20 cm深度的土壤EC和Cl-浓度以及5 cm深度的Na +浓度随距根的距离显着降低（P <0.05），但土壤pH和浓度均没有明显差异。 K +和Ca2 +。冲洗处理仅对20 cm深度的土壤EC，pH和Cl-浓度有显着影响。因此，盐渍土壤上耐盐物种的根际可能发生盐积累，而周期性的低降雨可能不会对根际和/或根区中的盐分布产生强烈影响。

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《土壤圈（英文版）》 |2005年第6期|784-791|共8页
作者
ZHANG Zhen-Hua; C. TANG; Z. RENGEL;
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作者单位

Agricultural Resource and Environmental Research Center, Jiangsu Academy of Agricultural Sciences, Nanjing 210014(China);

Soil Science and Plant Nutrition, School of Earth and Geographical Sciences, The University of Western Australia, 35Stirling Highway, Crawley WA 6009 (Australia);

Soil Science and Plant Nutrition, School of Earth and Geographical Sciences, The University of Western Australia, 35Stirling Highway, Crawley WA 6009 (Australia);

Department of Agricultural Sciences, La Trobe University, Bundoora Vic 3086 (Australia);

Soil Science and Plant Nutrition, School of Earth and Geographical Sciences, The University of Western Australia, 35Stirling Highway, Crawley WA 6009 (Australia);

CRC Plant-Based Management of Dryland Salinity, The University of Western Australia, 35 Stirling Highway, Crawley WA 6009 (Australia);

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
关键词
leaching; Puccinellia ciliata Bor.; rhizosphere; salt dynamics;

机译：浸出;Puccinellia ciliata Bor .;根际;盐动力学;

Salt Dynamics in Rhizosphere of Puccinellia ciliata Bor.in a Loamy Soil

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