AM真菌和解磷菌双接种对滨梅根蘖苗及盐土有机碳影响

Inoculating AM fungi and phosphate-solubilizing fungi on beach plum, a dominant species for bio-remedying seashore saline soil, can promote root suckers growth, and increase primary production significantly. Research on the mechanism of dual inoculation effect on root suckers of beach plum and organic carbon in saline soils is innovative in the field of the biological capture of CO2. On the basis of series studies on the beach plum, AM fungi and phosphate-solubilizing fungi, this project aims to answer the following key questions: 1) The effects of dual inoculation on glomalin-related soil protein and organic carbon in saline soils. 2) The effect of dual inoculation on P-N-C chain of AM symbiotic system. 3) The mechanism of the effects on primary production and organic carbon of beach plum in saline soils by strengthening P-N-C chain. The expected achievements from the research will make a substantial contribution to carbon sequestration biologically.

滨梅是海滨盐土碳生物捕集的优势物种，AM真菌和解磷菌双接种能促进滨梅根蘖苗的生长，显著提高生物量，研究双接种对滨梅根蘖苗及盐土有机碳的作用机制，在二氧化碳生物捕集的研究中具有鲜明的创新性。在项目组已有的滨梅、AM真菌及解磷菌系列研究的基础上开展本项研究将重点探讨如下问题：1、双接种对土壤球囊霉素及有机碳的效应机制； 2、双接种对AM共生体系中P-N-C链合的作用机制；3、强化P-N-C的链合对滨梅根蘖苗的初级生产及其土壤有机碳的作用机制。本项研究预期获得的有关AM真菌和解磷菌双接种对海滨盐土植物的初级生产及土壤有机碳作用机制方面的标志性成果将为二氧化碳生物捕集做出实质性贡献。

滨梅是海滨盐土碳生物捕集的优势物种，AM真菌和解磷真菌双接种能促进滨梅根蘖苗的生长，显著提高生物量。本项研究围绕双接种对滨梅根蘖苗净初级生产的影响开展的前期研究，获得了阶段性成果：丛枝菌根的形成改善了滨梅幼苗的微生态环境，提高根际土壤肥力，根际效应与AM真菌的种类有关；特定的AM真菌能够缓解土壤盐胁迫对滨梅的伤害；AM真菌和解磷真菌双接种对低磷土壤滨梅插条磷素营养的改善和生根、生长具有明显的互作效应；双接种可能通过强化微生物功能群、土壤酶活性和氮磷营养之间的关联来提高滨梅的耐盐性，AM真菌和解磷真菌间具有协同效应。本项研究获得的有关AM真菌和解磷菌双接种对海滨盐土植物的初级生产的阶段性成果为二氧化碳生物捕集提供了基础材料。