广东省困难立地区域“桑林引育增汇-功能桑饲料开发降碳-绿色养殖减排”生态种养模式关键技术研发

Revitalizing and excavating difficult site areas with basically zero carbon sequestration capacity,enhancing the carbon sink function of difficult site land,is of great significance for achieving the"dual carbon"and"beautiful China"strategies.By conducting screening,cultivation,and ecological planting and breeding models suitable for difficult site areas,we aim to enhance the carbon sequestration function of these areas.Difficult site areas,due to harsh environments or unreasonable human activities,have suffered damage to their ecosystems,making them a typical area with extremely low utilization rates,severely inadequate carbon sink functions,and serious constraints on the implementation of the"Beautiful China"strategy.Guangdong Province has a large area of difficult sites,mainly including coastal saline alkali land,the Dabaoshan mining area in northern Guangdong,and the inferior red bed desert(commonly known as Niugan Land)in the Nanxiong Basin.Plants are the primary factor in achieving or improving carbon sequestration in difficult areas,but there is a shortage of varieties and difficulty in forming forests in these areas,making them an important link in enhancing carbon sequestration capacity in these areas.Mulberry trees have the characteristics of strong adaptability,salt alkali resistance,barren tolerance,resistance to various heavy metals,rapid growth,and large biomass.Their annual fixed CO2 amount is 49291.7 kg/hm2,equivalent to pure carbon of 13467.7 kg/hm2,which is higher than most trees in terms of carbon sequestration capacity.Therefore,mulberry trees have the characteristics of both poor habitat tolerance and high carbon sequestration capacity.At the same time,mulberry branches and leaves contain various active substances that have the function of improving immunity and inhibiting glucose and lipid metabolism in animal feeding.This can increase carbon sequestration by reducing the amount of medication used in animal feeding.In addition,after harmless treatment of animal manure generated by green farming,it is returned to the mulberry forest,which not only reduces pollution but also partially replaces industrial fertilizers,and greatly increases carbon sink increment. Focusing on the three goals of"increasing foreign exchange,reducing carbon emissions,and reducing emissions",starting from the three ends of"ecological carbon fixation,raw material production,and industrial consumption",we will construct an artificial planting and breeding cycle model of"mulberry forest introduction,functional feed development,and green aquaculture"that synergizes multiple factors of green ecology and economic improvement.We will propose a solution for the ecological utilization of difficult site areas that connect and support"variety agriculture industry",Provide new theories,technologies,and models to support the improvement of carbon sequestration capacity in difficult site areas and the implementation of strategies such as"Beautiful China"and"Green Guangdong".