Effects of Foliar Spraying Diethyl Aminoethyl Hexanoate and Its Compound solution with Epibrassinolide on Physiological Characteristics and Grain Yield of Paeonia ostii'Fengdan'
In order to screen plant growth regulators suitable for high-yielding and high-efficiency culti-vation of oil peony,this experiment was conducted taking Paeonia ostii'Fengdan'as material.Different mass concentrations of aminoethyl hexanoate(D1,D2 and D3)and its compound solution with brassinolide(BD1,BD2 and BD3)were sprayed on the leaves of'Fengdan'at full-bloom stage(April 7),grain formation stage(April 18),pod and grain rapid growth stage(May 10),respectively.The effects of different treatments on plant physiological characteristics and grain yield indexes(100-grain weight,grain weight per fruit,grain weight per plant and grain yield)were studied.The results showed that compared with the control group,the key parameters of physiological characteristics of leaves and grain yield of peony were significantly improved af-ter spraying plant growth regulators.On July 3,the leaf SOD activity of BD2 treatment was significantly in-creased by 5.24%compared with the control.On May 19 and July 3,the MDA content in leaves of all treat-ments was significantly lower than that of the control.On July 3,the leaf soluble sugar content of all treatments was significantly different from that of the control,and that of BD2 treatment was the highest,which increased by 33.84%compared with the control.On June 10,the total chlorophyll content of all treatments was signifi-cantly higher than that of the control,and the increase of BD3 treatment was the largest(98.11%).In the three test periods,except BD3 treatment on June 10,the leaf net photosynthetic rate of all the other treatments was significantly higher than that of the control,and showed a trend of first increasing and then decreasing with the increase of mass concentration of aminoethyl hexanoate.The grain weight per plant and grain yield of all treatments were significantly higher than those of the control,and their increase of BD3 were the largest as 10.45%and 10.44%,respectively.The correlation analysis showed that SOD activity was significantly posi-tively correlated with Chl a,Chl b,Car and total chlorophyll contents and net photosynthetic rate,positively correlated with soluble sugar content,and significantly negatively correlated with MDA content.The total chlo-rophyll content was significantly positively correlated with net photosynthetic rate,and net photosynthetic rate was significantly positively correlated with grain weight per fruit,grain weight per plant and grain yield.In conclusion,the physiological characteristics of oil peony plants were excellent and higher grain yield could be obtained after spraying 12 and 16 mg/L aminoethyl hexanoate combined with 0.05 mg/L brassinolide.
万方数据
维普
