Model And Demonstration Of Planting For Carbon Sink And Low Carbon Breeding In The Rehabilitation Of Karst Rocky Desertification

Carbon can be sequestered though rehabilitation of rockydesertification. With the global ecology safety and sustainabledevelopment being threatened by the global worming, to study thecomprehensive treatment technologies of rocky desertificationwhich can increase carbon sink and reduce carbon emission ismeaningful for the ecological construction and social economydevelopment in kasrt area. The agriculture based on planting andbreeding not only plays a key role in the creation andrehabilitation of karst rocky desertification, but also is relatedclosely with the carbon emission caused by it and the carbon sinkthough it’s rehabilitation. So, the low carbon agriculture inkasrt and low carbon rocky desertification comprehensive treatmenttechnologies will be developed at the same time by studying ofplanting for carbon sink and low carbon breeding technologies. Twotypical karst physiognomies pilots were chose in Guizhou for studyin this paper: Salaxi Pilot in Bijie of Guizhou and Guanlin-Huajiangof Zhenfeng Pilot. The former one representants mild-mid rockydesertification of karst plateau-mountain and the later one ofmid-intense karst plateau valley. Based the terrestrial ecosystemcarbon cycle and karst carbon cycle, the carbon cycle model in karstarea was constructed and the ways of carbon sink or emission were analyzed. And then, with the theories of low carbon agriculture andcarbon footprint, and the date got by field research, the carbonemission of plating and breeding in karst were calculated thoughthe using of carbon emissions coefficients method. At last, basedthe analyzing of carbon emission features in karst area, thetechnologies of rocky desertification comprehensive treatment andlow carbon agriculture, the model and technology system of rockydesertification comprehensive treatment were constructed anddemonstrated. Main conclusions gain by this study are as follows:(1) In karst area, the carbon emission of planting is mainlyfrom fertilizer and straw burning, and that of breeding is mainlyfrom energy consumption and wastes management. The carbon emissionfrom agriculture of Bijie Salaxi Demonstration site in2011andZhenfeng-Guanling Huajiang Demonstration site in2010wasestimated with the use of emission coefficients method, and thecarbon emission composition was analyzed in this paper. It’s foundthat the carbon emission of planting is mainly from fertilizer andstraw burning, and that of breeding is mainly from energyconsumption and wastes management. This can give rockydesertification comprehensive treatment some guidance on reducingthe carbon emission. But there is no estimate of carbon sink andno analysis of carbon sink compositions in this paper, and can’t offer direction for rocky desertification comprehensive treatmenton increase carbon sink. So, the further study should focus on theestimate and compositions of carbon sink in karst rockydesertification area, so that can offer direction for rockydesertification comprehensive treatment on increase carbon sink.(2) Rocky desertification can reduce the carbon emission ofagriculture by changing the structure of agriculture and energy inrocky desertification area. Based on the unit plant area carbonemission of plant and unit area carbon emission of breeding,contrastive analysis between two study areas was taken in this paper.It’s found that both the unit plant area carbon emission ofplanting and unit area carbon emission of breeding in HuajiangDemonstration site are lower than that in Salaxi Demonstration site.And this is because that the carbon emission in HuajiangDemonstration site was reduced with the changing of agriculture andenergy structure in the process of rocky desertificationrehabilitation. So, the positive role of rocky desertificationrehabilitation was proved. But if we want to know the potential ofrocky desertification treatment in reducing carbon emission andincreasing carbon sink absolutely, an estimate system should beestablished, which concludes the reducing of agriculture carbonemission, increasing of terrestrial ecosystem carbon library and increasing of karst carbon sink.(3) Though optimizing the measures of rocky desertificationcomprehensive treatment with low carbon agriculture technologies,the technology system of planting for carbon sink and low carbonbreeding in the rehabilitation of karst rocky was constructed. Fromaspects of planting for carbon sink and low carbon breeding, thispaper abstracted the low carbon agriculture technologies, anddistributed them into6fields: seed select breeding technologies,stereoscopic planting, agriculture field management, clean energydevelopment and breeding wastes management. Then, check analysiswas taken between the low carbon agriculture technologies and mainrocky desertification comprehensive treatment technologies inthese fields. At last, the technology system of planting for carbonsink and low carbon breeding in the rehabilitation of karst rockywas constructed. Because lacking of the quantitative analysis, onlybased on the qualitative analysis, the rocky desertificationcomprehensive treatment measures was selected and optimized. If wewant to select and optimized the rocky desertificationcomprehensive treatment measures with quantitative analysis, themore practicable and targeted estimation method of carbon emissionand carbon sink in the rocky desertification comprehensivetreatment should be constructed. (4)6models of planting for carbon sink and low carbon breedingin the rehabilitation of karst rocky was constructed. Based thefield research of study area, and analyzed the projects and targetsof rocky desertification treatment,6models were constructed, theyare planting model for carbon sink suitable for ecosystemrehabilitation, planting model for carbon sink suitable forcomprehensive planting industry development, planting model forcarbon sink suitable for crops production, low carbon breedingmodel based clean energy development, planting-breeding mixedlow-carbon model based on herbivorous livestock andplanting-breeding mixed low-carbon model suitable forgarden-economy. The construction of above models lack of empiricaland quantitative analysis, and have no method to assess theincreasing of carbon sink and the reducing of carbon emission causedby rocky desertification comprehensive treatment. We need toconstruct the estimation method of carbon emission and carbon sinkin the rocky desertification comprehensive treatment, so that canquantitative analysis the increasing of carbon sink and thereducing of carbon emission which caused by the rockydesertification comprehensive treatment, and give the betterguidance for the demonstration and popularizing of the rockydesertification comprehensive treatment models.