Effects of Combined Application of Different Inorganic Sulfur Forms on Nitrate Reduction and Assimilation in Chinese Chive

With perennial greenhouse Chinese chive as experimental materials,10 mmol /L sulfur as total,to study the effects of inorganic sulfur forms on the nitrate content of Chinese chive,nitrogen metabolism and nutritional quality. Experimental results show that,the combined application of NaHSO 3 and Na 2 S 2 O 3 can significantly improve the activities of nitrate reductase( NR),glutamic-oxaloacetic transaminase( GOT),glutamic-pyruvic transaminase( GPT),and reduce the nitrate content effectively,especially,the effect of 7. 5 mmol / L NaHSO 3 + 1. 25 mmol / L Na 2 S 2 O 3 is the best,and it can decrease 35. 79%. After sulfur treatment,and the content of soluble protein,free amino acids,soluble sugar,Vitamin C in Chinese chive leaves increases in different degrees,especially, free amino acids has the greatest increases. 2. 5 mmol / L NaHSO 3 + 3. 75 mmol / L Na 2 S 2 O 3( S7) increases 88. 89%,and 5 mmol / L Na 2 S 2 O 3( S4) increases 83. 33% and soluble protein( A1P) increase. Meanwhile,the combined application of NaHSO 3 and Na 2 S 2 O 3 can also promote the accumulation of dry matter Chinese chive,and increase chives plant height and fresh weight.