The Research Of Afforestation Matching Technology In Difficult Site On Saline-alkali Land In Shanxi Province

It is a very difficult work for the improvement and afforestation in saline-alkali soil forestation in northern Shanxi province. Based on the Forestry industry research special funds for public welfare projects, aiming at the problem as the lack of species seedling, the low survival rate and the low preserving rate. Through filtering the salt resistant tree species, using the measure of the combination of the salt resistant tree species and harnessing alkalized soil to conduct an experiment on some species seedling; Using elaeagnus angustifolia to do experiments that through the combination of methods of a variety of site preparation reforestation and a variety of soil-conditioning chemical to harnessing alkalized soil. filtering the salt resistant tree species and methods of harnessing alkalized soil. This article have come to the tentative conclusion:1. Chinese Tamarisk Twig, Chinese tamarisk, Elaeagnus angustifolia, medlar, Pyrus betulaefolia, ulmus pumila, Populus diversifolia and Sabina vulgarisare studied by comparative experimental method. Based on the survival rate, the preserving rate, the physiological indexes, the pH of the soil and the electrical conductivity of the soil are introduced to make the synthetical arrangement objectively of different planting species. Adaptation showed:Chinese tamarisk> Chinese Tamarisk Twig>medlar>Sabina vulgarisare>Pyrus betulaefolia>Populus diversifolia>Elaeagnus angustifolia>ulmus pumila.2. Using different levels of black alum, furfural residue and fgd gypsum as soil amendment material. Soil amendment material, subcrust and coating combine in a multitude of ways to form different Mode. Based on the pH of the soil, the electrical conductivity of the soil and the soil moisture are introduced to make the synthetical arrangement objectively of different modes Results:Mode2>Mode12>Mode15>Mode19>Model>Mode3>Mode5>Mode7>Mode8>Mode9>Mode10> Mode13>Mode14>Mode16>Mode18>Mode6>Mode11>Mode17. The results indicated that the effect of Mode2,12,15and19on soil amelioration is the best.3. Elaeagnus angustifolia amendment material on daily basis by different methods of the experiment about photosynthesis as. Based on the Pn, the E, the C1and the CO2int of blade are introduced to make the synthetical arrangement objectively of different methods of the experiment about photosynthesis of elaeagnus angustifolia. Adaptation showed:Furfural residue is the best.