叶面喷施油菜素内酯和亚精胺对甜菜生长及产量的影响

【目的】研究不同浓度的油菜素内酯和亚精胺对甜菜生长和产量的影响。【方法】在塔额盆地滴灌施肥条件下，以甜菜Beta 796为材料进行田间喷施试验，设置8个喷施处理(CK:清水对照，BR:0.1、0.2和0.3mg/L,SP:35、70和105 mg/L,BR+SP:0.2 mg/L+70 mg/L),分析不同浓度的油菜素内酯和亚精胺对甜菜株高、叶片光合性能、叶绿素含量以及干物质积累和产量的影响。【结果】0.2 mg/L BR处理的叶片数、株高和叶绿素含量分别较CK增加了20.7%、25.72%和39.13%,净光合速率和蒸腾速率提高了33.88%和71.03%,总干物质积累增加了61.27%,产量和产糖量分别增加了32.31%和23.82%。105 mg/L SP处理的株高增加了9.53%,收获时青头比例降低了11.45%,产量增加了12.71%,含糖率提高了0.98%,产糖量增加了13.78%。【结论】喷施0.2 mg/L油菜素内酯可以促进甜菜生长，提高甜菜产量和产糖量，105 mg/L亚精胺可以提高块根含糖率和产糖量，复配组合并未起到更优的效果。

Effects of Spraying Brassinolide and Spermidine on Growth and Yield of Sugarbeet

【Objective】 To explore the effects of different concentrations of brassinolide and spermidine on the growth and yield of sugarbeet.【Method】 Under the condition of drip irrigation and fertilization in Ta'e area, the field spraying experiment was carried out with sugarbeet Beta 796 as experimental material, and eight spraying treatments were set up (CK: clear water control;BR:0.1 mg/L, 0.2 mg/L, 0.3 mg/L;SP:35 mg/L, 70 mg/L, 105 mg/L;BR+SP:0.2 mg/L+70 mg/L) to study the effects of different concentrations of brassinolide and spermidine on plant height, leaf photosynthetic performance, chlorophyll content, dry matter accumulation and yield of sugarbeet.【Results】 The results showed that the leaf number, plant height and chlorophyll content of 0.2 mg/LBR compared with CK increased by 20.7%, 25.72% and 39.13% respectively, net photosynthetic rate and transpiration rate increased by 33.88% and 71.03%, total dry matter accumulation increased by 61.27%, yield and sugar yield increased by 32.31% and 23.82%, respectively.The plant height of 105 mg/L SP treatment increased by 9.53%, the beet top ratio at harvest decreased by 11.45%, the yield increased by 12.71%, the sugar content increased by 0.98%, and the sugar yield increased by 13.78%.【Conclusion】 Spraying 0.2 mg/L brassinolide can promote sugarbeet growth and increase sugar yield and sugar yield and spraying 105 mg/L spermidine can increase sugar content and sugar yield of root tuber.Under the experimental conditions, the compound combination does not have a better effect.