缩节胺、比久对紫花苜蓿种子产量的影响

Effects of Mepiquat chloride and Bijiu on alfalfa seed yield

为了探究植物生长调节剂对紫花苜蓿种子产量的影响,试验采用随机区组方法,以龙牧801苜蓿为研究对象,采用缩节胺(80,160,240 mg/L)、比久(3000,5000,7000 mg/L)两种植物生长调节剂分别于现蕾期和盛花期两次对紫花苜蓿种子田进行叶面喷施,在成熟期测定不同浓度对紫花苜蓿种子产量及构成因子的影响,并进行相关性分析和逐步回归分析。结果表明:喷施缩节胺、比久(除7000 mg/L)后种子产量均显著高于对照(P<0.05)。各产量构成因子与种子产量均呈正相关,喷施缩节胺处理每平方米生殖枝数与种子产量呈显著正相关(P<0.05)。喷施比久处理每个生殖枝的结荚花序数与种子产量呈极显著正相关(P<0.01),每个荚果的种子数与种子产量呈显著正相关(P<0.05)。喷施缩节胺处理种子产量与各产量构成因子的逐步回归方程为Y=2.0439+0.2165X_(1)(Y为种子产量,X_(1)为每平方米生殖枝数)。喷施比久处理种子产量与各产量构成因子的逐步回归方程为Y=17.1753+0.0491X_(1)+0.9327X_(2)+3.8748X_(4)(Y为种子产量,X_(1)为每平方米生殖枝数,X_(2)为每个生殖枝的结荚花序数,X_(4)为每个荚果的种子数)。说明通过喷施缩节胺、比久两种植物生长调节剂能够显著增加紫花苜蓿种子产量。

In order to explore the effects of plant growth regulators on the seed yield of alfalfa,a random block method was used in this experiment.Longmu 801 was selected as the research object,and two plant growth regulators,Mepiquat chloride(80,160,240 mg/L)and Bijiu(3000,5000,7000 mg/L)were sprayed to alfalfa seed fields at the budding stage and the full flowering stage,respectively.The effects of different treatments on the yield and constituent factors of alfalfa seeds were examined at the maturity stage,and correlation analysis and stepwise regression analysis were carried out.The results showed that the seed yield treated with Mepiquat chloride and Bijiu(except for 7000 mg/L)was significantly higher than that in the control(P<0.05).Each yield component factors were positively correlated with seed yield,and the number of reproductive branches per square meter in the spraying Mepiquat chloride groups was significantly positively correlated with seed yield(P<0.05).There was a significant positive correlation between the number of pod inflorescences/reproductive branch and the seed yield(P<0.01)in the spraying Bijiu treatment,and a significant positive correlation between seed/pod number and seed yield(P<0.05).The stepwise regression equation between seed yield and yield component factors in the sprayed Mepiquat chloride treatment was Y=2.0439+0.2165X_(1)(Y was seed yield,X_(1) was the number of reproductive branches per square meter).The stepwise regression equation between seed yield and yield component factors in the spraying Bijiu treatment was Y=17.1753+0.0491X_(1)+0.9327X_(2)+3.8748X_(4)(Y was the seed yield,X_(1) was the number of reproductive branches per square meter,and X_(2) was the number of pods/reproductive branches,X_(4) was the number of seeds per pod).The results indicated that the spraying of Mepiquat chloride and Bijiu could significantly increase the yield of alfalfa seeds.