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野外用剥落法采集落叶松 (Larixgmelini)根际土与非根际土 ,分析P浓度的变化 ,结果表明 ,落叶松根际土与非根际土全P浓度无明显差异 ,但根际土有效P却明显高于非根际土 .12年生时根际土有效P增加12 .6 % ,40年生时增加 2 3 .4% ,表明落叶松根际对土壤中的P具有活化作用 .落叶松根际土无机P各组分与非根际土亦有差异 ,表现出根际土O P低于非根际土 ,Al P、Fe P、Ca P和NH4 Cl P则高于非根际土的趋势 .落叶松根际土的 pH低于非根际土 ,但落叶松根际并未发生明显酸化 .落叶松根际有效P与 pH变化相关不显著
In the field, the Larixgmelini rhizosphere soil and non-rhizosphere soil were collected by exfoliation method, and the change of P concentration was analyzed. The results showed that there was no significant difference in total P concentration between Larix gmelini rhizosphere soil and non-rhizosphere soil, but P But significantly higher than that of non-rhizosphere soil.The 12-year-old rhizosphere soil effective P increased 12.6%, 40-year-old increased 23.4%, indicating that the larch rhizosphere soil P activation .Large rhizosphere soil The content of OP in rhizosphere soil was lower than that in non-rhizosphere soil, and Al P, Fe P, Ca P and NH 4 Cl P were higher than those in non-rhizosphere soil. The pH value of rhizosphere soil of rhizosphere soil was lower than that of non-rhizosphere soil, but the rhizosphere of larch had no obvious acidification.