Effect of Uniconazole on Growth,Seed Yield and Quality of Prairie Grass
The effect of uniconazole on plant growth,seed yield and quality of prairie grass was explored in order to provide a scientific basis for the seed yield and quality improvement.The plant growth,seed yield and germination characteristics of prairie grass'Jiangxia'were studied by spraying different concentrations of uniconazole(0 mg/kg,50 mg/kg,90 mg/kg and 130 mg/kg)at jointing stage in a random block design.The results showed that uniconazole reduced plant height and increased lodging resistance.Except that 50 mg/kg uniconazole significantly increased the reproductive branch number(P＜0.05),other treatments had no significant effects on the second stem node length,stem diameter,tiller number of plants and reproductive branch number.The spikelet number/reproductive branch,seed number and yield of prairie grass were increased by spraying different concentrations of uniconazole,but the difference of the all indexes was significant only under 50 mg/kg treatment(P＜0.05).90 mg/kg uniconazole treatment significantly increased seed vigor index(P＜0.05),but all treatments had little effect on 1000-seed weight,germination rate and germination index.Correlation analysis showed that plant height was positively correlated with lodging rate,tillers number and reproductive branch number(P＜0.01).And seed yield was positively correlated with reproductive branch number(P＜0.05).The highest seed yield of prairie grass was 1508.31 kg/hm2 when 50 mg/kg uniconazole was sprayed,which was 13.63％higher than that of the control and the difference was significant(P＜0.05).
万方数据
维普
