玉米木质素自降解系统的构建与秸秆饲料化利用研究

Crop straw is annually the most abundant lignocellulosic materials of terrestrial plants in our country. For aboveground biomass, Maize stalk approximately occupies 60%-70% of the plant. Every year, the most of maize straw are being burned randomly or being raw material for papermaking, except for being covered in the land or methane production. This treatment of straw seriously resulted in environment pollution. It’s a burning question for Maize straw being effectively utilized. Efficient regulation of lignin biosynthesis for straw fodder Production in Maize is the primary objective of this project. first, vector construction will be done in order to high efficiently regulate and control lignin biosynthesis of Maize stalks . By using modern biotechnology, the content and component of lignin will be changed during the later stage of growth. Then, several varieties of Maize will be achieved, which stalks will be easily converted to straw feed. And that, it will be evaluated that whether this regulation system of lignin synthesis could improve the quality of Maize straw fodder or not. This project will provide theoretic support to resolve environmental pollution resulted from improper treatment of Maize straws and to promote the industrialization of crop stalks.

秸秆是我国陆地植被中年生长量最高的生物质资源。玉米秸秆占其生物产量的60%-70%，目前除少部分饲用和秸秆还田外，多数被荒置、焚烧或制浆造纸，伴随的高污染和高能耗等问题十分严重，秸秆是令人头疼的城镇固体废弃物之一，即使作为饲料，玉米茎秆也因木质素的存在而难以被牲畜有效吸收利用，玉米茎秆的工业化高效利用研究迫在眉睫。本课题拟在前期研究结果的基础上，构建玉米木质素自降解的高效调控系统，转化并获得玉米茎秆在衰老期可自行降解的自交系A188，并研究该调控系统在秸秆饲料化利用中的应用潜力。