Screening of Fungal Mutant Strain with High Laccase Yield by N+-Implantation and Enzyme Production Condition Optization Effect of N+ Implantation on the Inducement of Polyploid Astragalus membranaceus(Fisch.) Bge. var. mongholicus(Bge.) Hsiao Screening of Lactic Acid Bacteria with High Autolysis Rate by N+ Implantation VARIATION OF HMW-CS AND GLIADIN INDUCED BY LOW ENERGY N~+ IMPLANTATION IN COMMON WHEAT SEEDS EFFECT OF N~+ IMPLANTATION ON RICE IR36 SEEDS GERMINATION