Chen Yongliang, Han Shijie, Zhou Yumei, Zou Chunjing, Zhang Junhui
Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016.
Ying Yong Sheng Tai Xue Bao. 2002 Jul;13(7):790-4.
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 P content were analyzed. The results showed that the available P content in the rhizosphere soil in the pure Larix gmelinii was 55.8% higher than that in the non-rhizosphere soil, while the available P content in the pure Juglans mandshurica was higher than that in the non-rhizosphere soil by 10.1%. The roots of Larix gmelinii had important effect on mobilizing P in the rhizosphere soil. The available P content 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 P content in the rhizosphere soil of Larix gmelinii was much higher was elucidated by means of P absorption, P desorption, and inorganic P gradation.
通过剥离胡桃楸和兴安落叶松纯林及混交林根系附着的土壤，采集根际和非根际土壤，并分析有效磷含量。结果表明，兴安落叶松纯林根际土壤有效磷含量比非根际土壤高55.8%，而胡桃楸纯林根际土壤有效磷含量比非根际土壤高10.1%。兴安落叶松根系对根际土壤中磷的活化有重要作用。由于兴安落叶松根系的影响，混交林中胡桃楸根际土壤有效磷含量比纯林中高45.2%。通过磷吸收、磷解吸和无机磷分级等方法阐明了兴安落叶松根际土壤有效磷含量高得多的机制。
