喷施新型腐植酸对谷子籽粒产量和品质的影响OA北大核心CSTPCD

To investigate the effect of foliar spraying of a new humic acid on yield and quality of millet.Experiments were conducted by taking pure water as the control(NC),and three gradients of low concentration(0.75 L/hm2,600 × liquid,LC),medium concentration(3.75 L/hm2,120 x liquid,MC),and high concentration(7.50 L/hm2,60 × liquid,HC)were set up.They were sprayed on the foliar surface of the grain during the filling period.The effects of spraying new humic acid on millet yield and grain quality during the filling period were analyzed by measuring yield,spike traits,and several indexes such as protein,amino acids,fat,carbohydrates,straight-chain starch,yellow pigment,total flavonoids,polyphenols.Changes in the yield and nutritional quality were determined.The results showed that:1)The foliar spraying of new humic acid during the irrigation period increased the yield through increasing the weight of thousand grain weight,and the effect of yield increase was HC＞MC＞LC＞NC.Compared with spraying with water,the middle and high concentration treatments were able to increase the yield by 18.5％and 19.4％,respectively,and the optimal concentration of the yield increase ranged from 60 to 120 times.2)Spraying new humic acid during the irrigation period improved the quality of millet,and it increased the contents of protein,amino acid,yellow pigment and polyphenol.3)The quality indexes of grains under different treatments were comprehensively analyzed by principal component analysis.The ranking of total score in descending order was MC＞LC＞HC＞NC,and the medium concentration(3.75 L/hm2,120 × liquid,MC)treatment had the best effect on quality improvement.In conclusion,the foliar spraying of novel humic acids could enhance the yield and improve the quality of millet,and the medium concentration treatment is optimal.