生物质发酵液仿生强化黄土植被根际生境的机制

Biomass-derived hydrolysates contain chemical and biological components similar to those of root exudates. The present project aims to establish a biomimetic niche simulating that of rhizosphere, in order to expedite the physical, chemical and biological reaction and convention in soil, thereby to accelerate the property improvement of poor soil. Therefore, the project takes soil from Loess plateau as the targeted object, implies the factorial experiments to investigate the independent and synergetic influences of biotic and abiotic components contained in the biomass-derived hydrolysates, i.e., volatile fatty acids, macromolecular organic matters, mineral elements, hydrolases, microorganism cells, to assess the intensity and durability of these influences. The project will study on the hydrolysates direct effect, indirectly priming effect and the resultant plant growth. The project will design and set up artificial root bioreactor, in order to temporally and spatially evaluate the physicochemical and biological properties of soils in the microdomains around the artificial roots during the long-term input of biomass-derived hydrolysates. Thereby, the project will try to exploit the mechanism underlying the soil property regulation through biomass-derived hydrolysates.

生物质发酵液富含类似根系分泌物的化学组分和生物成分。本项目拟通过调控生物质发酵液组成，诱导形成类似根际层的仿生生境，从而加速土壤物、化、生复合生境的转化，以达到快速改良贫瘠土壤性质的目的。由此，本申请项目拟以典型黄土为改良目标，以土壤培育的方法析因分析生物质发酵液中不同类型有机酸、其它有机物、元素、水解酶、微生物等非生物因子与生物因子影响土壤性质的独立作用机制和复合作用机制、作用强度和作用持续性；在长期配施过程中，探究发酵液对土壤—微生物二元体系的直接输入作用、间接激发作用，以及可造成的植物生态效应；构建人工根系反应器，以从时空维度评估生物质发酵液补给导致的根际微域理化和生化性质演化规律。据此，探索生物质发酵液组成优化调理黄土根际理化生境的响应机制与效应。

生物质发酵液富含类似根系分泌物的化学组分和生物成分。本项目研究目标是通过调控生物质发酵液组成，诱导形成类似根际层的仿生生境，从而加速土壤物、化、生复合生境的转化，以达到快速改良贫瘠土壤性质的目的。具体以典型黄土为改良对象，开展了“生物质发酵液非生物因子和生物因子成分分析”、“析因分析生物质发酵液非生物因子的土壤改性原理”、“析因分析生物质发酵液生物因子的土壤改性原理”、“生物质发酵液诱导土壤改性的过程耦合验证”、“改性土壤的植物地上地下生物功能调控原理”以及“生物质发酵液有效成分高浓度制备和分离”等有关研究工作。