Research On The Key Techniques And The Provincinal Technical Criterion's Formulation Of Schima Superba's Sowing Seedling

This research,based on the randomized block design,is mainly on such The technique indexes of Schima superba's sowing seedling as the fertilizer types, sowing method,coverage thickness and the seed amount,and the investigate parameters are the germination percent, height,diameter,length of taproot,number of lateral roots,total seedlings and the number of qualified seedlings.With the help of statistics,we get the results as follows: (1)The sowing method usually is related to the total seedlings and the number of qualified seedlings while it nearly useless to the quality of seedlings.Even though the number of seedlings from the broadcast sowing method is larger than the other ways,however its labor input is much more and its management is too complicated. Therefore the strip sowing is our choice; (2)The seedlings of Schima superba need the enough phosphate and potash fertilizer's support.So increasing their settings is so important that it shouid be emphasized in the future; (3)The coverage thickness is obviouslyaffects the germination, which is the key factov to the germination percentlf the high germination percent and the perfect root system have to be simultaneously taken into account,we think the 0.50cm of coverage percent is the best one.(4).The seed amount affects not only the quantities but quality of the seedlings.Due to the contradiction between the quantity and quality, and the correlation among the seed quantities,quality,sowing method and the nursery's situation,it is very difficult to decide the seed amount,and,on the basis of our experiments,5kg/667m2 is a possible selection.In terms of our research and the project plan drafted by the Technology Supervision Bureau of Hunan Province,we compiled The Technique Regulation on The Sowing Seedling of Schima superba and an anmex.on the edit directions which should exert a great influence to the seed and seedling industry.The topic carried on systematic study at first to Schima superbas sowingseeding. The Technique Regulation is of benefit production .It filled in the blank oftheTechnique Regulation of the wide-leaf trees seeding.