胡桃楸、落叶松纯林及其混交林根际土壤有效磷特性的研究

摘要/Abstract

摘要： 用剥落分离法采集胡桃楸(Juglans mandshurica)、落叶松(Larix gmelinii)纯林及其混交林根际与非根际土壤并分析有效P含量特性.结果表明,落叶松纯林根际土有效P含量较其非根际土高出55.8%,而胡桃楸纯林根际土有效P含量较其纯林仅高出10.1%,表现出落叶松根系对根际P较强的活化能力.树种混交后,借助落叶松根系的作用使混交林中胡桃楸根际土有效P含量较其纯林高出45.2%.通过P的吸附/解吸及无机P分级等方面,对落叶松根际土壤有效P含量较高的原因进行了分析.

关键词: 纯林, 混交林, 根际, 有效P, AZTI海洋生物指数, 生态评价, 底栖动物多毛类和端足目指数, 底栖生物指数, 多毛类机会种和端足目动物指数

Abstract: The rhizosphere and non rhizosphere soils were sampled in the pure and mixed plantations of Juglans mandshurica and Larix gmelinii by peeling the adhering soil of the roots, and the available Pcontent were analyzed. The results showed that the available Pcontent in the rhizosphere soil in the pure Larix gmelinii was 55.8% higher than that in the non rhizosphere soil, while the available Pcontent in the pure Juglans mandshurica was higher thanthat in the non rhizosphere soil by 10.1%. The roots of Larix gmelinii had important effect on mobilizing Pin the rhizosphere soil. The available Pcontent in rhizosphere soil of Juglans mandshurica in the mixed plantation was higher than that in the pure plantation by 45.2% due to the effects of the roots of Larix gmelinii. The mechanism by which the available Pcontent in the rhizosphere soil of Larix gmelinii was much higher was elucidated by means of Pabsorption, Pdesorption, and inorganic Pgradation.

Key words: Pure plantation, Mixed plantation, Rhizosphere, Available P., AZTI marine biotic index (AMBI), ecological assessment., benthic biotic index, benthic polychaetes amphipods (BPA), benthic opportunistic polychaetes amphipods (BOPA)

中图分类号:

S714.8

陈永亮, 韩士杰, 周玉梅, 邹春静, 张军辉. 胡桃楸、落叶松纯林及其混交林根际土壤有效磷特性的研究[J]. 应用生态学报, 2002, (7): 790-794.

CHEN Yongliang, HAN Shijie, ZHOU Yumei, ZOU Chunjing, ZHANG Junhui . Characteristics of available P in the rhizosphere soil in pure Juglans mandshurica and Larix gmelinii and their mixed plantation[J]. Chinese Journal of Applied Ecology, 2002, (7): 790-794.

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