摘要
研究不同浓度复配封顶剂飞喷对棉花的封顶效果,结果表明,高浓度处理的株高、株宽、果台数、主茎节间数、平均LAI较中浓度减少了2.76%、5.89%、6.37%、7.77%、0.61%,较低浓度处理减少了11.85%、9.78%、16.94%、18.68%、6.25%,其平均SPAD值和单叶Pn较中浓度增加了6.49%、4.46%,较低浓度处理增加了12.47%、17.51%;低药剂浓度处理的茎、叶干物质积累显著高于中、高浓度处理,其生殖器官干物质积累及最终产量明显低于中、高浓度处理,且中浓度与高浓度处理差异不显著.无人机喷施甲哌鎓水剂 1 200～1 500 mL/hm2+烯效唑300～375 g/hm2+油酸甲酯40～47.5 mL/hm2,可有效控制株型,增加产量.
Abstract
A study was conducted on the capping effect of different concentrations of composite capping agents on cotton.The results showed that the plant height,plant width,number of fruit stands,number of internodes on the main stem,and average LAI of the high concentration treatment decreased by 2.76%,5.89%,6.37%,7.77%,and 0.61% compared to the medium concentration,decreased by 11.85%,9.78%,16.94%,18.68%,and 6.25% compared to the lower concentration.The average SPAD value and single leaf Pn of high concentra-tion treatment increased by 6.49% and 4.46% compared to medium concentration treatment,while the lower concentration treatment increased by 12.47% and 17.51%;The dry matter accumulation in stems and leaves of low concentration treatments was significantly higher than that of medium and high concentration treatments,and the dry matter accumulation in reproductive organs and final yield were significantly lower than those of medium and high concentration treatments.Moreover,there was no significant difference between medium and high concentration treatments.Drone spraying of 1 200-1 500 mL/hm2 of meperidium water solution with 300-375 g/hm2 of uniconazole and 40-47.5 mL/hm2 of methyl oleate can effectively control plant type and increase yield.
维普
万方数据