烯效唑对低氮水平下红小豆生长和产量的影响OA

To investigate the regulatory effects of uniconazole on the growth and yield of adzuki bean under low nitrogen level,two adzuki bean cultivars,Pearl Red(small-grained cultivar)and Ji Hong 352(large-grained cultivar),were selected as test materials.The 50 mg·L-1 uniconazole solution was used as the exogenous regulator.A pot culture method was adopted to simulate low nitrogen environment,with two nitrogen levels set:low nitrogen treatment(N1:pure N 28.8 kg·hm-2)and conventional fertilization control(N2:pure N 57.6 kg·hm-2).Foliar spraying of uniconazole was conducted at the initial flowering stage.Key physiological indices including morphological characteristics,photosynthetic characteristics,and carbon-nitrogen metabolism of adzuki bean were deter-mined to clarify the regulatory effects of uniconazole on the growth and yield under low nitrogen level.The results showed that foliar application of 50 mg·L-1 uniconazole significantly increased the net photosynthetic rate of adzuki bean under low nitrogen level,with the net photosynthetic rate of Zhenzhuhong and Jihong 352 increased by 25.06％and 11.46％,respectively.Meanwhile,uniconazole enhanced the carbon-nitrogen metabolism capacity of adzuki bean;the fructose content of Zhenzhuhong and Jihong 352 increased by 21.24％and 23.33％,respectively.It further promoted plant growth and biomass accumulation,and ultimately improved the yield of adzuki bean.