Effect of Spraying Different Nutrient Elements on Physiological Index and Yield of Buckwheat

CHEN Wenjin; SHENG Jinhua; ZHANG Xiongjie

doi:10.15933/j.cnki.1004-3268.2015.04.005

Abstract：To study the effects of foliar fertilization on the chlorophyll content,enzymatic activity,yield and quality of common buckwheat,the mixture of different macro elements(A),trace elements(B) and plant growth regulators ( C) were sprayed on the buckwheat variety Fengtian 1. The leaf chlorophyll content and enzyme activity, yield and quality were measured. The results showed that the highest chlorophyll content came from the A3B1C3 treatment after 35 days of the first spraying,while the biggest difference of chlorophyll contents between 7 days and 35 days of the first spraying was A1B3C3 treatment,the SPAD being 6. 46 higher in 35 days than in 7 days. Among the combinations of macro elements,the chlorophyll content of buckwheat was A3 > A2 > A1,and A3 also had the maximum value on SOD, POD, CAT activities. Among the combinations of micro elements, the chlorophyll content of buckwheat was B1 > B3 > B2, and B2 had the maximum value on SOD,POD,CAT activities. Among the treatments of different plant growth regulators,the chlorophyll content of buckwheat was C1 > C3 > C2, and treatments C2 and C3 had the maximum value on SOD and POD,but little effect on CAT. The trace elements had the biggest effects on yield and protein content of buckwheat,followed by macro elements, and then by plant growth regulators. The highest content of total starch was treatment 6 (A3B2C1),while the highest protein content and yield was treatment 7 ( A1B3C3). Based on the results of yield and quality,the best treating combination was 3. 003 g / L calcium sulfate,4. 004 g / L magnesium sulfate and 5. 005 g / L monopotassium phosphate for macro elements,and 3. 003 g / L borax,1. 001 g / L manganese chloride and 2. 002 g/ L ammonium molybdate for trace elements,and 6 g/ L ABA,15 g/ L GA3 and 15 g/ L 2,4 - D for plant growth regulators.