Hole Sowing And Grafting Based Building Technique For 'Tongxinyuanzao' And Its Investment Analysis At Arid Area

'TongxinYuanzao'(Zizipus jujuba Mill.cv.'TongxinYuanzao') is a landrace which suitable to plant at the arid area middle part of Ningxia Hui autonomous region.Its main characters include drought-Resistance,cold-Resistance,barren resistance,wide-adaptability, especially extremely drought-Resistance.It is pioneer tree for afforest abandoned hill and sandy land,and is economic tree at middle part of Ningxia Hui autonomous region.Based on the situation of low survival rates caused by supply shortage at Seedling and arid,the research building garden by the technique of hole sowing Sour Jujube(Ziziphus van. spinosa Hu) and grafting'TongxinYuanzao' rootstock seedling.Soil humidity were raised and water loss were reduced by the drought-Resistance measures of bring forward the site preparation time to autumn,covering plastic,covering soil on all plastic,hole sowing, Irrigation.Seeding rate and survival rate were raised by the measures of seed soaking, pregermination,sowing in time,reseeding.Seedlings growing were promoted by the measures of additional fertilizer and Irrigation at sides of hole,strengthen field management on the basis of protect plastic.Overwinter survival rate were raised by the measures of tipping to promote lignifications,covering soil.Graft'TongxinYuanzao' by the measures of wax sealing and cold storage scion.To promote the growth of grafting seedling by the measures of re-grafting,erasing redundant buds,binding the brunches for the purpose of building garden of 'TongxinYuanzao'.The data compare result shows that the suitable sowing time is middle May,the soil covering depth should be 2-3cm after seeding.Seedling time is 5-7 days,and 10 days at most, the seedling rate can reached 98%,and the growth were balanced.The seedling height reached 35cm at the year of sowing for Sour Jujube,the average diameter at bottom exceeded 0.5cm,the overwinter survival rate exceeded 95%,percentage of seedling to the hole exceeded 98%,percentage of suitable for grafting reached 93%,meet the need of grafting and building garden.Suitable time for grafting is early May,the survival rate reached 95%,the average seedling height reached 75cm at the same year of grafting,the average diameter at bottom reached 0.75cm,the qualified seedling rate reached(aboveâ…¡level) 85.5%, meet the need of building garden.The cost reached 3567.7 Yuan/ha by above-mentioned Technique,333.5 Yuan lower than plant seedling directly,and the combined cost is 450-500 Yuan lower than plant seedling directly,and reduced cost the fund is 1018.8 Yuan/ha for government;Compare to build garden by plant seedling directly,the lab force input of build garden by sowing is 41.7%higher,the cost increase 770Yuan/ha,the lab force input is 48 person/ha,equal to 1750 Yuan,reached 49.1%of the total cost,is 24%higher than the former, so the lab force needed is higher than the former.But,the corresponding rate often can not reach the same standard by the technique of build garden by plant seedling directly,and must be re-plant at second year.And,to build garden by the technique of hole sowing and grafting, the problem of seedling supply could be released,the survival rate could be raised,the survival rate of first year could reach the accepted standard.So the economic effect and social effect is lower than building garden by the technique of hole sowing and Grafting.