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采用三室根箱研究了磷高效小麦 81( 85) 5 3 3 3及磷低效NC37两个小麦品种根际磷转化及VA菌根对根际土壤磷转化的影响。结果表明 ,磷胁迫下 ,81( 85) 5 3 3 3的吸磷量略高于NC37,两种小麦品种根际土壤均形成了明显的Olsen P ,Ca2 P ,Ca8 P ,Al P等形态磷的耗竭区。两种小麦品种在不施磷肥和施用磷肥下接种VA菌根 ,小麦的生物量、植株磷浓度、小麦根际Olsen P ,Ca2 P ,Ca8 P ,Al P ,Fe P的消耗量均显著增加 ;根际、非根际土壤各形态磷素的浓度梯度明显降低。
The rhizosphere phosphorus transformation of two wheat cultivars, P (superscript r) high efficient wheat 81 (85) 5 3 3 3 and phosphorus inefficient NC37, and the effects of VA mycorrhizosphere on phosphorus transformation in rhizosphere soil were studied using a three-compartment root box. The results showed that the phosphorus uptake of 81 (85) 5 3 3 3 was slightly higher than that of NC37 under phosphorus stress, and obvious forms of phosphorus such as Olsen P, Ca2 P, Ca8 P and Al P were formed in rhizosphere soil of both wheat cultivars The depletion zone. In the two wheat cultivars, VA mycorrhizae were inoculated without phosphate fertilizer and application of phosphate fertilizer. The biomass of wheat, plant phosphorus concentration, Olsen P, Ca2 P, Ca8 P, Al P, Fe P consumption in wheat rhizosphere increased significantly. Rhizosphere and non-rhizosphere soil phosphorus concentration gradient significantly reduced.